| avian paramyxovirus serotype 3 infection in neopsephotus, cyanoramphus, and neophema species. | an outbreak of avian paramyxovirus serotype 3 (apmv-3) infection occurred in a private bird collection consisting mainly of neophema species. two bourke's parrots (neopsephotus bourkii) and one red-crowned parakeet (cyanoramphus novaezelandiae) were examined after developing torticollis and circling. the 3 birds were euthanatized and submitted for necropsy. brain and liver samples from the 3 birds were homogenized and inoculated into the allantoic cavity of 10-day-old embryonated specific-pathog ... | 2009 | 19999764 |
| luminance-dependence of spatial vision in budgerigars (melopsittacus undulatus) and bourke's parrots (neopsephotus bourkii). | budgerigars (melopsittacus undulatus) and bourke's parrots (neopsephotus bourkii) are closely related birds with different activity patterns. budgerigars are strictly diurnal while bourke's parrots are active in dim twilight. earlier studies show that the intensity threshold of colour vision is similar in both species while bourke's parrots have larger eyes with a higher density of rods than budgerigars. in this study, we investigate whether this could be an adaptation for better spatial vision ... | 2012 | 22001888 |
| a novel herpesvirus associated with respiratory disease in bourke's parrots (neopsephotus bourkii). | a novel herpesvirus infection in nine bourke's parrots (neopsephotus bourkii, formerly neophema bourkii) housed in an outdoor aviary comprised of multiple species of birds was diagnosed based on histopathology, electron microscopy and polymerase chain reaction (pcr). clinical signs in the parrots included anorexia, ruffled feathers, depression, loss of weight and respiratory distress. the most common gross lesions were moderately congested and oedematous lungs and a mild fibrinous exudate in the ... | 2012 | 23237365 |
| psittacid herpesvirus 3 infection in the eclectus parrot (eclectus roratus) in australia. | psittacid herpesvirus 3 (pshv-3) has recently been implicated as the cause of a severe respiratory disease in bourke's parrots (neopsephotus bourkii) in the united states. in this report, the clinical manifestations and gross and microscopic lesions of pshv-3 infection in 2 eclectus parrots (eclectus roratus) in australia are described. the presence of a pshv-3 infection was confirmed by polymerase chain reaction amplification and sequencing of pshv-3 dna using degenerate and pshv-3 primers. ele ... | 2013 | 23697483 |
| occurrence of ornithonyssus sylviarum in pet birds from the district of setúbal, portugal. | ornithonyssus sylviarum is a blood-feeding ectoparasite of birds and the most serious pest in poultry farms in north america. although the mites are typically adapted to temperate climates, information on this mite in europe is sparse, and dermanyssus gallinae is considered to be the only mite impacting the poultry industry. the present study reports the occurrence of o. sylviarum in pet birds in portugal. mites were collected directly from birds and with traps placed in cages and nests at 20 di ... | 2017 | 28523489 |
| a survey of a mixed species aviary provides new insights into the pathogenicity, diversity, evolution, host range, and distribution of psittacine and passerine adenoviruses. | a bourke's parrot (neopsephotus bourkii) originating from an aviary in australia, containing two species of parrots, five species of finch and a species of dove, was presented for necropsy. the bourke's parrot died from gastritis caused by macrorhabdus ornithogaster, but also had an interstitial nephritis and ureteritis with adenovirus-like inclusion bodies within collecting duct epithelial cells. the adenovirus causing the lesions was shown to be psittacine adenovirus-2 (psadv-2) using a pcr as ... | 2019 | 31081348 |
| retinal ganglion cell topography and spatial resolution of two parrot species: budgerigar (melopsittacus undulatus) and bourke's parrot (neopsephotus bourkii). | retinal ganglion cell (rgc) isodensity maps indicate important regions in an animal's visual field. these maps can also be combined with measures of focal length to estimate the theoretical visual acuity. here we present the rgc isodensity maps and anatomical spatial resolving power in three budgerigars (melopsittacus undulatus) and two bourke's parrots (neopsephotus bourkii). because rgcs were stacked in several layers, we modified the nissl staining procedure to assess the cell number in the w ... | 2014 | 24677162 |
| the intensity threshold of colour vision in two species of parrot. | we have used behavioural tests to determine the intensity thresholds of colour vision in bourke's parrots (neopsephotus bourkii) and budgerigars (melopsittacus undulatus). we have also examined the relationship between these thresholds and the optical sensitivities of single photoreceptors using morphological methods. bourke's parrots lose colour vision in brighter light (0.4 cd m(-2)) than budgerigars (0.1 cd m(-2)) and both birds lose colour vision in brighter light (;end of civil twilight') t ... | 2009 | 19880731 |