The intensity threshold of colour vision has been behaviourally tested in birds; the results show that parrots lose colour vision in brighter light than humans.

Parrots are popular companion animals, but are frequently relinquished because of behavioral problems, including abnormal repetitive behaviors like feather damaging behavior and stereotypy. In addition to contributing to pet relinquishment, these behaviors are important as potential indicators of diminished psychological well-being. While abnormal behaviors are common in captive animals, their ...

The African Grey parrot (Psittacus erithacus) is one of the most popular avian pets in exotic animal practice. In this study, blood samples (n = 459) from healthy parrots 239) were collected for haematological testing. Reference intervals determined according to guidelines American Society Veterinary Clinical Pathology with Value Advisor (v2.1) freeware. calculated reference (RIs) were: packed ...

Mitochondrial genome rearrangements that result in control region duplication have been described for a variety of birds, but the mechanisms leading to their appearance and maintenance remain unclear, and their effect on sequence evolution has not been explored. A recent survey of mitochondrial genomes in the Psittaciformes (parrots) found that control region duplications have arisen independen...