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Journal articles on the topic 'Cockatiles'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Alcaraz, Luis David, Apolinar M. Hernández, and Mariana Peimbert. "Exploring the cockatiel (Nymphicus hollandicus) fecal microbiome, bacterial inhabitants of a worldwide pet." PeerJ 4 (December 22, 2016): e2837. http://dx.doi.org/10.7717/peerj.2837.

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BackgroundCockatiels (Nymphicus hollandicus) were originally endemic to Australia; now, they are popular pets with a global distribution. It is now possible to conduct detailed molecular studies on cultivable and uncultivable bacteria that are part of the intestinal microbiome of healthy animals. These studies show that bacteria are an essential part of the metabolic capacity of animals. There are few studies on bird microbiomes, and, to the best of our knowledge, this is the first report on the cockatiel microbiome.MethodsIn this paper, we analyzed the gut microbiome from fecal samples of thr

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2

A., A. R. Khafagy, A. Moustafa M., S. Ibrahim I., I.I. Shabana, and F. Khalifa M. "Prevalence and characterization of Esherichia coli isolated from apparently healthy and diseased Cockatiles." Global Animal Science Journal 2, no. 1 (2015): 1247–52. https://doi.org/10.5281/zenodo.19362.

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A total of 258 fecal samples from Cockatiles and budgerigars (230 from apparently healthy birds and 28 from clinically diseased) were collected. The bacteriological examination revealed the isolation of <em>E.coli</em> (51.28%), Salmonella (10.26%), <em>Klebsiella</em> (17.95%), Proteus (17.95%) and <em>Enterobacter</em> (2.56%) respectively in relation to total number of isolates. They were infected with percentage of <em>E.coli</em> (7.75%), <em>Salmonella</em> (1.55%), <em>Klebsiella</em> (2.71%), proteus (2.71%) and <em>Enterobacter</em> (0.39%) respectively in relation to total number of

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3

A., A. R. Khafagy, A. Moustafa M., S. Ibrahim I., I.I. Shabana, and M. F. Khalifa I. "Prevalence and characterization of Esherichia coli isolated from apparently healthy and diseased Cockatiles and budgerigars." Global Animal Science Journal 2, no. 1 (2015): 139–44. https://doi.org/10.5281/zenodo.27223.

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A total of 258 fecal samples from Cockatiles and budgerigars (230 from apparently healthy birds and 28 from clinically diseased) were collected. The bacteriological examination revealed the isolation of <em>E.coli</em> (51.28%), Salmonella (10.26%), <em>Klebsiella</em> (17.95%), Proteus (17.95%) and <em>Enterobacter</em> (2.56%) respectively in relation to total number of isolates. They were infected with percentage of <em>E.coli</em> (7.75%), <em>Salmonella</em> (1.55%), <em>Klebsiella</em> (2.71%), proteus (2.71%) and <em>Enterobacter</em> (0.39%) respectively in relation to total number of

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4

Tomasek, O., O. Kubicek, and V. Tukac. "Unusual fatal avian polyomavirus infection in nestling cockatiels (Nymphicus hollandicus) detected by nested polymerase chain reaction." Veterinární Medicína 52, No. 5 (2008): 193–201. http://dx.doi.org/10.17221/2002-vetmed.

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High mortality of nestling cockatiels (<i>Nymphicus hollandicus</i>) was observed in one breeding flock in Slovakia. The nestling mortality affected 50% of all breeding pairs. In general, all the nestlings in affected nests died. Death occurred suddenly in 4- to 6-day-old birds, most of which had full crops. No feather disorders were diagnosed in this flock. Two dead nestlings were tested by nested PCR for the presence of avian polyomavirus (APV) and <i>Chlamydophila psittaci</i> and by single-round PCR for the presence of beak and feather disease virus (BFDV). After th

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5

Andersen, Arthur A. "Comparison of Pharyngeal, Fecal, and Cloacal Samples for the Isolation of Chlamydia Psittaci from Experimentally Infected Cockatiels and Turkeys." Journal of Veterinary Diagnostic Investigation 8, no. 4 (1996): 448–50. http://dx.doi.org/10.1177/104063879600800407.

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Direct comparisons were made of Chlamydial isolation rates from pharyngeal swabs, fecal samples, and cloacal swabs from cockatiels and pharyngeal and cloacal swabs from turkeys experimentally infected with Chlamydia psittaci. During pathogenesis studies, 133 paired specimens were collected from cockatiels and 118 paired specimens were collected from turkeys. Of the 51 cockatiel Chlamydial infections detected, 80.4% were positive by the pharyngeal swab sample, 45.1% were positive by the fecal swab sample, and 37.3% were positive by the cloacal swab sample. Of the 87 turkey infections detected,

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6

Carvalho, T. S. G., C. C. Abreu, P. A. Nakayama, F. Wouters, C. E. P. Saad, and M. G. Zangeronimo. "Undifferentiated carcinoma of the pancreas in a cockatiel ( Nymphicus hollandicus ): case report." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 69, no. 3 (2017): 600–602. http://dx.doi.org/10.1590/1678-4162-9429.

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ABSTRACT Undifferentiated carcinoma of the pancreas is a malignant neoplasm that is uncommon among domestic species, especially cockatiels (Nymphicus hollandicus), one of the most popular birds kept as a pet throughout the world. The aim of this study was to describe the occurrence of an undifferentiated carcinoma in the pancreas of a cockatiel. A bird, an adult male that died naturally with swelling in the abdominal region, was referred to necropsy. Macroscopic examination showed poor body condition, the coelomic cavity filled with liquid and a white mass attached to the pancreas and other sm

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7

Jones, D. "Feeding Ecology of the Cockatiel, Nymphicus-Hollandicus, in a Grain-Growing Area." Wildlife Research 14, no. 1 (1987): 105. http://dx.doi.org/10.1071/wr9870105.

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The feeding ecology of the cockatiel Nymphicus hollandicus was studied in a grain-growing district near Moree, in northern New South Wales, between August 1980 and June 1982, by direct observations and monthly collections of birds in feeding flocks. Cockatiels fed from the ground, on fallen seed or by felling stems, and, when feeding on sorghum and sunflowers, while perched on the seed heads. The mean size of a feeding flock was 27; large flocks of more than 100 birds were formed only during periods of limited food supply. Cockatiels showed a clear preference for sorghum over sunflowers, and w

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8

KazemiLifshagerd, Farzin, Omid BehrouziNasab, Alireza Koochakzadeh, and Majid Kazemnezhad. "Evaluation of Giardiasis in Companion Birds in Mashhad, Iran." Journal of World’s Poultry Science 2, no. 3 (2023): 20–23. http://dx.doi.org/10.58803/jwps.v2i3.16.

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Introduction: Giardia spp. are parasitic protozoans that infect the digestive system of ornamental birds, especially in Psittaciformes, with different prevalence in various species. Symptoms of Giardia infection vary from no noticeable signs in adult birds to poor growth, weakness, anorexia, ruffled feathers, and diarrhea in chicks. This study aimed to evaluate the prevalence of giardiasis in some parrots referred to a private veterinary clinic in Mashhad, Iran, during 2022. Case report: Feces of 215 birds suspected of being infected with Giardia spp. were collected. The birds were visited at

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9

Schneider, Helena, Dominik Fischer, Klaus Failing, et al. "Investigations on different Semen Extenders for Cockatiel Semen." Journal of Zoo Biology 1, no. 1 (2018): 01–12. http://dx.doi.org/10.33687/zoobiol.001.01.1579.

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The aim of the present study was the modification and evaluation of three different semen extenders for cockatiel semen in order to achieve a long survival time for transport, examination purpose and for potential cryopreservation, respectively. Therefore, individual and pooled semen samples of 30 cockatiels (Nymphicus hollandicus) were investigated for pH and osmolality values and subsequently pH and osmolality values of the semen extenders were adjusted to those values in the semen. Pooled semen samples were then partitioned into four equal parts and diluted with the three different semen ex

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10

Krohn, Judith, Dominik Fischer, Helena Schneider, et al. "Modification and Clinical Application of the Inner Perivitelline Membrane Test in Different Avian Species." Veterinary Sciences 6, no. 2 (2019): 39. http://dx.doi.org/10.3390/vetsci6020039.

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The aim of this study was to adapt an inner perivitelline membrane (IPVM) test as an interspecies penetration assay for avian spermatozoa. The IPVM of different bird species was evaluated to test the penetrating ability of avian spermatozoa in an intra- and interspecies design. Isolation of the IPVM via acid hydrolysis was tested in pre-incubated chicken eggs and in six other avian species. The separation protocol was modified (time, acid concentration) to facilitate practicability. Separated membranes were evaluated with dark field microscopy for the presence of holes produced by penetrating

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Grimes, James E. "Enigmatic psittacine chlamydiosis: Results of serotesting and isolation attempts, 1978 through 1983, and considerations for the future." Journal of the American Veterinary Medical Association 186, no. 10 (1985): 1075–79. https://doi.org/10.2460/javma.1985.186.10.1075.

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SUMMARY From 1978 through 1983, chlamydiosis was diagnosed by isolation of Chlamydia psittaci from various types of psittacine birds. The organism was isolated from 126 (30.4%) of 414 tissue specimens, with the percentages ranging from 12.5% (budgerigars) to 42.8% (cockatiels), excluding 2 parakeets with 1 isolation (50%). From 1,035 cloacal swab/feces specimens, 51 (4.9%) isolations were made, ranging from 1.4% from African grays (1 of 70) to 27.8% from lovebirds (5 of 18). Positive direct microscopic examination of stained (Gimenez method) tissue impressions correlated with positive isolatio

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12

Millam, James, Tracey Spoon, and Donald Owings. "Variation in the stability of cockatiel (Nymphicus hollandicus) pair relationships: the roles of males, females, and mate compatibility." Behaviour 141, no. 10 (2004): 1211–34. http://dx.doi.org/10.1163/1568539042729711.

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AbstractPair relationships and their emergent properties represent potentially significant sources of proximate and ultimate influence on mating systems, but the study of such relational factors has been rare compared to the volume of literature dedicated to individual-level measures of mate quality. This study assessed variation in the stability of pair relationships in cockatiels (Nymphicus hollandicus) and sought sources for that variation in both the behavior of mated individuals and their compatibility. Pair relationships represent an especially salient aspect of the social system of cock

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13

Garcia-Mazcorro, Jose F., Cecilia Alanis-Lopez, Alicia G. Marroquin-Cardona, and Jorge R. Kawas. "Composition and Potential Function of Fecal Bacterial Microbiota from Six Bird Species." Birds 2, no. 1 (2021): 42–59. http://dx.doi.org/10.3390/birds2010003.

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Gut microbial communities play a fundamental role in health and disease, but little is known about the gut microbiota of pet bird species. This is important to better understand the impact of microbes on birds’ health but may also be relevant in a context of zoonoses. Total genomic DNA samples from pooled fecal samples from 30 flocks (4–7 pet birds per flock) representing over 150 birds of six different species (two Passeriformes: Northern Mockingbird (Mimus polyglottos) and Zebra Finch (Taeniopygia guttata), and four Psittaciformes: Lovebird (Agapornis, different species), Cockatiel (Nymphicu

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14

Seki, Yoshimasa. "Cockatiels sing human music in synchrony with a playback of the melody." PLOS ONE 16, no. 9 (2021): e0256613. http://dx.doi.org/10.1371/journal.pone.0256613.

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It is known among aviculturists that cockatiels imitate human music with their whistle-like vocal sounds. The present study examined whether cockatiels are also able to sing “in unison”, or, line up their vocalizations with a musical melody so that they occur at the same time. Three hand-raised cockatiels were exposed to a musical melody of human whistling produced by an experimenter. All the birds learned to sing the melody. Then, two out of these three birds spontaneously joined in singing during an ongoing melody, so that the singing by the bird and the whistling by the human were nearly pe

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15

Brilhante, R. S. N., D. S. C. M. Castelo-Branco, G. D. P. Soares, et al. "Characterization of the gastrointestinal yeast microbiota of cockatiels (Nymphicus hollandicus): a potential hazard to human health." Journal of Medical Microbiology 59, no. 6 (2010): 718–23. http://dx.doi.org/10.1099/jmm.0.017426-0.

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Cockatiels are the world's second most popular psittacine pet bird, but no data characterizing their gastrointestinal microbiota have been found. Thus, the aim of this work was to characterize the yeast gastrointestinal microbiota of cockatiels and to evaluate the relevance of cockatiels as carriers of potentially pathogenic yeasts. A total of 60 cockatiels, from 15 different premises, were assessed. A thorough clinical examination was performed with each bird, and samples were collected from oral cavity, crop and cloaca. The stools were collected from cages where the birds were kept. The isol

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16

Panegossi, Mariele Fernanda da Cruz, Giovanni Widmer, Walter Bertequini Nagata, et al. "Cryptosporidium proventriculi in Captive Cockatiels (Nymphicus hollandicus)." Pathogens 12, no. 5 (2023): 710. http://dx.doi.org/10.3390/pathogens12050710.

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Cockatiels (Nymphicus hollandicus) are among the most commonly sold psittacines pets. The aim of this study was to evaluate the occurrence of Cryptosporidium spp. in domestic N. hollandicus and identify risk factors for this infection. We collected fecal samples from 100 domestic cockatiels in the city of Araçatuba, São Paulo, Brazil. Feces from birds of both genders and older than two months were collected. Owners were asked to complete a questionnaire to identify how they handle and care for their birds. Based on nested PCR targeting the 18S rRNA gene, the prevalence of Cryptosporidium spp.

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17

Harms, Craig A., James J. Hoskinson, David S. Bruyette, et al. "Development of an experimental model of hypothyroidism in cockatiels (Nymphicus hollandicus)." American Journal of Veterinary Research 55, no. 3 (1994): 399–404. http://dx.doi.org/10.2460/ajvr.1994.55.03.399.

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Summary Hypothyroidism is 2 possible predisposing factor in a number of disorders of companion psittacine birds. We developed and validated a thyroid-stimulating hormone (tsh) response testing protocol for cockatiels (Nymphicus hollandicus), using 0.1 IU of tsh/bird given IM, with blood sample collection at 0 and 6 hours after tsh, and a commercial radioimmunoassay for thyroxine (T4). This protocol was used to document a seasonal sex difference in stimulated T4 values— females responded with higher T4 values than those in males in summer—and a stress-induced depression of baseline T4 values wa

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18

Woods, Leslie W., R. P. Chin, and Bradd C. Barr. "Esophageal Trichomoniasis in Cockatiels." AAV Today 1, no. 5 (1987): 203. http://dx.doi.org/10.2307/30133071.

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19

Wheler, Colette. "Pituitary Tumors in Cockatiels." Journal of the Association of Avian Veterinarians 6, no. 2 (1992): 92. http://dx.doi.org/10.2307/30134990.

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20

Rall, Isabell, Ralf Amann, Sara Malberg, Christiane Herden, and Dennis Rubbenstroth. "Recombinant Modified Vaccinia Virus Ankara (MVA) Vaccines Efficiently Protect Cockatiels Against Parrot Bornavirus Infection and Proventricular Dilatation Disease." Viruses 11, no. 12 (2019): 1130. http://dx.doi.org/10.3390/v11121130.

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Parrot bornaviruses (PaBVs) are the causative agents of proventricular dilatation disease (PDD), a chronic and often fatal neurologic disorder in Psittaciformes. The disease is widely distributed in private parrot collections and threatens breeding populations of endangered species. Thus, immunoprophylaxis strategies are urgently needed. In previous studies we demonstrated a prime-boost vaccination regime using modified vaccinia virus Ankara (MVA) and Newcastle disease virus (NDV) constructs expressing the nucleoprotein and phosphoprotein of PaBV-4 (MVA/PaBV-4 and NDV/PaBV-4, respectively) to

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21

Wuest, Elisa, Sarah Malberg, Jana Petzold, et al. "Experimental Infection of Embryonic Cells and Embryonated Eggs of Cockatiels (Nymphicus hollandicus) with Two Parrot Bornavirus Isolates (PaBV-4 and PaBV-2)." Viruses 14, no. 9 (2022): 1984. http://dx.doi.org/10.3390/v14091984.

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Parrot bornavirus (PaBV) might be transmitted vertically. Cockatiel embryonic brain cells and embryonated eggs of cockatiels (ECE) were infected with PaBV-2 and PaBV-4. In embryonic brain cells, PaBV-2 and PaBV-4 showed no differences in viral spread despite the slower growth of PaBV-2 compared with PaBV-4 in CEC-32 cells. ECE were inoculated with PaBV-4 and 13–14 dpi, organs were sampled for RT-PCR, immunohistochemistry/histology, and virus isolation. In 28.1% of the embryos PaBV-4-RNA and in 81.3% PaBV-4-antigen was detected in the brain. Virus isolation failed. Division of organ samples and

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Ibrahim, Mohamed, and S. M. Al-Kafagy. "Morphological Comparative Study of Proventriculus and Gizzard Between Bronze Fallow Cockatiel and White Eared Bulbul." SAR Journal of Anatomy and Physiology 6, no. 02 (2025): 75–79. https://doi.org/10.36346/sarjap.2025.v06i03.005.

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The current result aimed to investigate the comparative morphological note of gizzard and proventriculus between two bird (white eared bulbul and bronze fallow cockatiel) according to their food type. In this study used (10 sample) from each bird. The proventriculus of bulbul was spindle tubular in shape- pink in color, the internal surface have shallow longitudinal fold. While in cockatiel the proventriculus was red in color with the spindle shape, the internal surface there was conical projection. The weight of proventriculus of bulbul was more the than that in cockatiel while the length of

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Carvalho, T. S. G., M. G. Zangeronimo, C. E. P. Saad, et al. "Behaviour of cockatiels (Nymphicus hollandicus) at two temperatures in captivity." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 67, no. 6 (2015): 1669–74. http://dx.doi.org/10.1590/1678-4162-7892.

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Behavioural studies with cockatiels (Nymphicus hollandicus) in captivity are scarce. Due to the need for appropriate management of these animals, this study was performed to examine the behaviour of cockatiels kept in captivity at two temperatures. Sixteen cockatiels were individually housed in cages (62cm high x 43cm long x 27cm wide) and fed with a commercial ration and seed mixture for psittacids. Water was provided ad libitum. The eight-day experiment was divided into two stages of four days each. In the first stage, the birds were kept at room temperature (25°C) with 70% relative humidity

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Curtis-Velasco, Michelle. "Giardia-like Organism in Cockatiels." Journal of the Association of Avian Veterinarians 4, no. 4 (1990): 206. http://dx.doi.org/10.2307/27670962.

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25

Buyukmihci, Nedim C., Christopher J. Murphy, Joanne Paul-Murphy, Dennis V. Hacker, Louis J. Laratta, and Dennis E. Brooks. "Eyelid malformation in four cockatiels." Journal of the American Veterinary Medical Association 196, no. 9 (1990): 1490–92. http://dx.doi.org/10.2460/javma.1990.196.09.1490.

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Pearson, James T. "Energetics of embryonic development in the cockatiel (Nymphicus hollandicus) and the king quail (Coturnix chinensis)." Australian Journal of Zoology 47, no. 6 (1999): 565. http://dx.doi.org/10.1071/zo98064.

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In this study the energetics of embryonic development and metabolism of the altricial cockatiel (Nymphicus hollandicus) were compared with that of the precocial king quail (Coturnix chinensis), which produces hatchlings of similar body mass (~4 g). On average, cockatiel invested 28% less energy in their eggs (principally as smaller yolks), which contained more water than king quail eggs. Cockatiel embryo mass and the accumulation of tissue solids increased at slower rates than in king quail. A similar fraction of egg energy was converted to yolk-free hatchling (50%) in both species; however, k

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Hong, Hsin-Tai, and Chean-Ping Wu. "Evaluation of Steroid Sex Hormone Levels in Cockatiels During Their Reproductive Cycle." Journal of Agricultural Science 11, no. 3 (2019): 172. http://dx.doi.org/10.5539/jas.v11n3p172.

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Sexual steroid hormone concentrations differ with respect to the different stages of animal life. For example, hormone concentrations in the reproductive stage show a periodic variation. Studies on variations in sexual hormones in parrots using non-invasive methods as well as the effect of nest-boxes in parrots are less. This study aimed to detect the levels of fecal steroid hormones during the cockatiel reproductive cycle and to investigate the effect of nest-box placement on reproduction. There were 24 mating pairs of cockatiels, and the study was conducted over 13 months. Based on their rep

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Li, S. J., E. Njumbe Ediage, S. De Saeger, et al. "Occurrence and pathology of mycotoxins in commercial parrot feeds." World Mycotoxin Journal 6, no. 4 (2013): 449–53. http://dx.doi.org/10.3920/wmj2013.1570.

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Mycotoxins are toxic secondary metabolites of fungi. Animal feeds can be easily infected by fungi during production and storage, resulting in mycotoxin contamination. This study was performed to evaluate the possible health risks of mycotoxin-contaminated feed for cockatiels. The occurrence of mycotoxins in commercial parrot feeds (5 seed mixes and 5 pelleted feeds) was investigated by liquid chromatography tandem mass spectrometry. The following 12 mycotoxins were detected: zearalenone, deoxynivalenol, 3-acetyldeoxynivalenol, 15-acetyldeoxynivalenol, fusarenon X, aflatoxin B1, sterigmatocysti

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VanDerHeyden, Nicole, and Willie M. Reed. "Paramyxovirus Group 3 Infection in Cockatiels." AAV Today 1, no. 2 (1987): 53. http://dx.doi.org/10.2307/30134357.

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Doolen, Michael. "Compounded Doxycycline in Budgies and Cockatiels." Journal of the Association of Avian Veterinarians 5, no. 4 (1991): 191. http://dx.doi.org/10.2307/27671056.

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Freitas, Priscilla Pimentel, Vanair Carlos da Paz, and Rodrigo Diana Navarro. "Feeding behavior of cockatiels in captivity." Brazilian Journal of Veterinary Research and Animal Science 57, no. 4 (2020): e168320. http://dx.doi.org/10.11606/issn.1678-4456.bjvras.2020.168320.

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In nature, cockatiel (Nymphicus hollandicus) feed consists of a huge variety of seeds, fruits, flowers, leaves, and insects. In captivity, their feed is generally poor, as many breeders offer only a mixture of seeds as food, leading to nutrient deficiency and even obesity. This paper presents a study on cockatiel feeding behavior in artificial environments at different stages of development (growth, maintenance, and reproduction), to evaluate their preference from the offer of six different food types (sunflower seed, oats, millet, rice, ration, and a cornmeal based feed or farinhada), and an

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Schmidt, Robert E., Laura L. Becker, and Jack M. McElroy. "Malignant intraocular medulloepithelioma in two cockatiels." Journal of the American Veterinary Medical Association 189, no. 9 (1986): 1105–6. https://doi.org/10.2460/javma.1986.189.09.1105.

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PYE, GEOFFREY W., R. AVERY BENNETT, RENEE PLUNSKE, and JEFF DAVIDSON. "Endoscopic Salpingohysterectomy of Juvenile Cockatiels (Nymphicus hollandicus)." Journal of Avian Medicine and Surgery 15, no. 2 (2001): 90–94. http://dx.doi.org/10.1647/1082-6742(2001)015[0090:esojcn]2.0.co;2.

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34

Fitzgerald, Scott D., Christine Hanika, and Willie M. Reed. "Lockjaw syndrome in cockatiels associated with sinusitis." Avian Pathology 30, no. 1 (2001): 49–53. http://dx.doi.org/10.1080/03079450020023195.

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Wilson, Ronald B., Myron A. Holscher, James R. Fullerton, and Mahlon D. Johnson. "Pineoblastoma in a Cockatiel." Avian Diseases 32, no. 3 (1988): 591. http://dx.doi.org/10.2307/1590937.

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36

McCluskey, James D., Robert R. Haight, and Stuart M. Brooks. "Cockatiel-induced hypersensitivity pneumonitis." Environmental Health Perspectives 110, no. 7 (2002): 735–38. http://dx.doi.org/10.1289/ehp.02110735.

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Murray, Michael J. "The New Cockatiel Handbook." Journal of the Association of Avian Veterinarians 3, no. 4 (1989): 206. http://dx.doi.org/10.2307/27670894.

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Roudybush, T. E., and C. R. Grau. "Cockatiel (Nymphicus Hollandicus) Nutrition." Journal of Nutrition 121, suppl_11 (1991): S206. http://dx.doi.org/10.1093/jn/121.suppl_11.s206.

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39

Carvalho, T. S. G., C. E. P. Saad, R. R. Alvarenga, et al. "Use of collard green stalks as environmental enrichment for cockatiels ( Nymphicus hollandicus ) kept in captivity." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 69, no. 3 (2017): 718–24. http://dx.doi.org/10.1590/1678-4162-8988.

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ABSTRACT The objective of this study was to evaluate the influence of collard green stalks as environmental enrichment on the behavior of cockatiels (Nymphicus hollandicus) maintained in captivity. Sixteen birds were housed individually in cages and fed a commercial diet for parrots and seed mix, with water ad libitum during 12 days in climatic chamber with temperature and relative humidity simulating tropical conditions. The animals (n = 8) were divided into two groups, control and enriched, and the experimental period was divided into two phases (during and after enrichment) of four days eac

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Roudybush, T. E., and C. R. Grau. "Reproductive Activity of Force-Paired Cockatiels (Nymphicus hollandicus)." Auk 106, no. 1 (1989): 86–93. http://dx.doi.org/10.2307/4087760.

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Piepenbring, Anne K., Dirk Enderlein, Sibylle Herzog, et al. "Pathogenesis of Avian Bornavirus in Experimentally Infected Cockatiels." Emerging Infectious Diseases 18, no. 2 (2012): 234–41. http://dx.doi.org/10.3201/eid1802.111525.

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Kwon, Y. K., S. H. Wee, J. H. Kook, and C. G. Lee. "Outbreak of enteric cryptosporidiosis in cockatiels (Nymphicus hollandicus)." Veterinary Record 156, no. 7 (2005): 210–11. http://dx.doi.org/10.1136/vr.156.7.210.

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Naves, D. A. S., T. S. G. Carvalho, M. G. Zangeronimo, C. E. P. Saad, and J. D. Scalon. "Food preferences of cockatiel chicks ( Nymphicus hollandicus ) in captivity." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 69, no. 3 (2017): 683–86. http://dx.doi.org/10.1590/1678-4162-9430.

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ABSTRACT In order to improve the management and maintenance of the quality of life of captive wild birds, this study aimed to assess the food preferences of cockatiel chicks (Nymphicus hollandicus) kept in captivity. Thirty-two cockatiel chicks, three to 12 months of age, were kept in a galvanized, wire-netted vivarium with six ceramic feeders, two for an extruded diet, two for a dry-mashed diet and two for a seed mixture. Both extruded and dry-mashed food are commercial psittacine diets. Three round ceramic pots were used to provide water. The birds were exposed to 12 hours of artificial ligh

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Walløe, Solveig, Heidi Thomsen, Thorsten J. Balsby, and Torben Dabelsteen. "Differences in short-term vocal learning in parrots, a comparative study." Behaviour 152, no. 11 (2015): 1433–61. http://dx.doi.org/10.1163/1568539x-00003286.

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Parrots are renowned for their vocal learning abilities. Yet only few parrot species have been investigated and empirically proven to possess vocal learning abilities. The aim of this study was to investigate if short-term vocal learning may be a widespread phenomenon among Psittaciformes. Through an interactive experiment we compare the ability of four parrot species, the peach-fronted conure (Aratinga aurea), the cockatiel (Nymphicus hollandicus), the peach-faced lovebird (Agapornis roseicollis) and the budgerigar (Melopsittacus undulatus), to vocally match playback of contact calls. All fou

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Petzold, Jana, Anna Maria Gartner, Sara Malberg, et al. "Tissue Distribution of Parrot Bornavirus 4 (PaBV-4) in Experimentally Infected Young and Adult Cockatiels (Nymphicus hollandicus)." Viruses 14, no. 10 (2022): 2181. http://dx.doi.org/10.3390/v14102181.

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Proventricular dilatation disease (PDD) caused by parrot bornavirus (PaBV) infection is an often-fatal disease known to infect Psittaciformes. The impact of age at the time of PaBV infection on organ lesions and tissue distribution of virus antigen and RNA remains largely unclear. For this purpose, tissue sections of 11 cockatiels intravenously infected with PaBV-4 as adults or juveniles, respectively, were examined via histology, immunohistochemistry applying a phosphoprotein (P) antibody directed against the bornaviral phosphoprotein and in situ hybridisation to detect viral RNA in tissues.

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Kafrashi, Muhammad H., and Daryoush Babazadeh. "Prevalence of Avian Gastric Yeast (Macrorhabdus ornithogaster) in Parrots and Parakeets: A Case Study." Journal of World’s Poultry Science 1, no. 1 (2022): 29–31. http://dx.doi.org/10.58803/jwps.v1i1.5.

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Introduction: The avian gastric yeast (Macrorhabdus ornithogaster) is a microorganism that infects aviary birds worldwide and can cause chronic wasting disease. Macrorhabdus ornithogaster, previously named Megabacter, infects a large group of companion birds, such as cockatiels, budgerigars, lovebirds, parrots, african gray parrots, and green-cheeked parakeets. The aim of the present case study was to evaluate the infection by Macrorhabdus ornithogaster in some companion birds and to show their prospects in the future. Case report: The investigated species included 145 cockatiels, gray p

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SYCHRA, OLDÃICH. "Neopsittaconirmus vendulae, a new species of louse (Phthiraptera: Philopteridae) from the Cockatiel Nymphicus hollandicus (Psittaciformes: Cacatuidae)." Zootaxa 1270, no. 1 (2006): 57. http://dx.doi.org/10.11646/zootaxa.1270.1.5.

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A new species of Neopsittaconirmus Conci is described from lice collected from captive cockatiels Nymphicus hollandicus, in Australia, Czech Republic, and Germany. This is the first record of lice from this host. These captive birds probably originated from limited populations which were randomly selected from wild populations and then bred and transported by cage-bird breeders. Keys are provided for identification of the 27 species of Neopsittaconirmus.

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Swartout, Margaret S., and Milton Wyman. "Pancreatic carcinoma in a cockatiel." Journal of the American Veterinary Medical Association 191, no. 4 (1987): 451–52. https://doi.org/10.2460/javma.1987.191.04.451.

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Haq, Seema, and Sadaf Saghier. "Cockatiel Birds Causing Hypersensitivity Pneumonitis." Southern Medical Journal 98, Supplement (2005): S62. http://dx.doi.org/10.1097/00007611-200510001-00173.

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Rosenwax, AC, and ML Cowan. "Fibrous ingluvial foreign bodies in 33 cockatiels (Nymphicus hollandicus)." Australian Veterinary Journal 93, no. 10 (2015): 381–84. http://dx.doi.org/10.1111/avj.12367.

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