This highly variable city pigeon is familiar to all urban ... Adult male: metallic green and purple iridescence on the neck and breast; iris orange to red; orbital skin blue-gray; bill grayish ...

The extinction of the passenger pigeon is a poignant example of what happens ... sides of the throat changed in color to a shining metallic bronze, green, and purple at the back of the neck. The lower ...

The large, heavily built gray pigeon frequents the forests and woodlands ... narrow white half-collar across the upper hind neck, with iridescent greenish below. Iris pale yellow; narrow orbital ...