In humans, geometrical illusions are thought to reflect mechanisms that are usually helpful
for seeing the world in a predictable manner. These mechanisms deceive us given the right …

This fifth edition book is a comprehensive guide to the behaviour and welfare of domestic
animals. It provides practical information for those involved with farming, pet animals and …

Birds are renowned for their exceptional vision and the way that this enables them to survive
and navigate the world in such a unique way. However, it is now recognised that avian …

Birds have impressive physiological adaptations for colour vision, including tetrachromacy
and coloured oil droplets, yet it is not clear exactly how well birds can discriminate the …

Completely updated and revised, and synthesizing the recent explosion in animal welfare
literature, the sixth edition of this best-selling textbook continues to provide a thorough …

To interact with its visual environment, an organism needs to perceive objects in both space
and time. High temporal resolution is hence important to the fitness of diurnally active …

The assessment of flicker fusion frequency (FFF), the stimulus frequency at which a flickering
light stimulus can no longer be resolved and appears continuous, and critical flicker fusion …

The luminance contrast sensitivity function has been investigated using behavioral and
electrophysiological methods in many vertebrate species. Some features are conserved …

Abstract Budgerigars (Melopsittacus undulatus) and Bourke's parrots (Neopsephotus
bourkii) are closely related birds with different activity patterns. Budgerigars are strictly …

Piling behaviour of laying hens often results in smothering or death due to suffocation.
Mechanisms leading to piling are not yet understood though various potential factors have …