Melopsittacus undulatus

Birds are generally thought to have excellent vision with high spatial resolution. However, spatial contrast sensitivity of birds… (More)

Birds have excellent spatial acuity and colour vision compared to other vertebrates while spatial contrast sensitivity is… (More)

Yawning is contagious in humans and some non-human primates. If there are social functions to contagious behaviors, such as… (More)

Understanding the mechanistic bases of natural color diversity can provide insight into its evolution and inspiration for… (More)

BACKGROUND While considerable scientific effort has been devoted to studying how birds navigate over long distances, relatively… (More)

The perceived locations of paired auditory images, simulating direct sounds and their echoes, have been recently studied in… (More)

The susceptibility of budgerigars (Melopsittacus undulatus) to graded doses of Toxoplasma gondii oocysts was studied. Sixteen… (More)

Discrimination of three synthetic versions of a/ra-la/ speech continuum was studied in two species of birds. The stimuli used in… (More)

Budgerigars (Melopsittacus undulatus) and zebra finches (Poephila guttata) share a common functional class of vocalizations… (More)

Avoidance conditioning and the method of limits were used to measure absolute auditory thresholds, masked thresholds, and… (More)