We might think that we understand how birds communicate ... we perceive yellow. Different combinations of cone stimulation result in the perception of various colors. A deficiency in one or ...

So the possibility of intensifying color through biofluorescence ... neck and chest, or, for birds on different branchlets in the family tree, the chest and belly. Often the sexes differed.

Illuminated by blue and UV light, the birds’ white and bright yellow plumage broadcasts colors that may be used ... relatively understudied in a lot of different groups,” Lamb said.

Once you are watching a bird, it’s time to play detective. Each bird you see is a mystery for your family to solve ... people notice about a bird is its color, but there are a lot of other ...

He also examined specimens of other, more distantly related species to represent more of the bird family tree. Previous research has revealed how long ago different species of flightless birds ...