The pollen beetle Meligethes aeneus Fabricius (Coleoptera, Nitidulidae), a pest of oilseed
rape (Brassica napus), is known to respond to coloured stimuli; however, current …

A very large proportion of the world's animal species are active in dim light, either under the
cover of night or in the depths of the sea. The worlds they see can be dim and extended, with …

During the day, a non-uniform distribution of long and short wavelength light generates a
colour gradient across the sky. This gradient could be used as a compass cue, particularly …

The colors of fruits and flowers are traditionally viewed as an adaptation to increase the
detectability of plant organs to animal vectors. The detectability of visual signals increases …

During dusk and dawn, the ambient illumination undergoes drastic changes in irradiance (or
intensity) and spectrum (or color). While the former is a well-studied factor in synchronizing …

Sexual communication between male and female fireflies involves the visual detection of
species-specific bioluminescent signals. Firefly species vary spectrally in both their emitted …

Successive color contrast and color constancy were investigated with a behavioral training
technique using pigment colors. In both experiments, single, freely flying bees were trained …

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 …

Aim The observed decrease in insect colour lightness with increasing latitude has been
explained in earlier macroecological studies by the increased solar absorption of dark …

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