Dull-colored birds don’t see the world like colorful birds do

Bengalese finches — also called the Society finch — are a species of brown, black and white birds that don’t rely on colorful signals when choosing a mate. Consequently, when presented with a color-perception test that their bright red-beaked cousins the Zebra finches routinely ace, they seem to be paying more attention to differences in brightness than hue.