Males have iridescent orange-red feathers on their throats, which can change color with the light ... yellow-orange beak. The bird's body is olive-green and blue overall, but its underside ...

Thus, the bird's brain was thought to be nearly all instinct driven. The dark and light blue regions ... and brown and orange, seen in the images below). The darker blue area is called the midbrain.

From fiery red to electric blue, birds in the UK are a riot of colour ... Catch a male crossbill in the right light and they appear almost flame-like with startingly red-orange plumage. The females ...