Identification - This warbler is the size of a small sparrow. The male is olive green above and yellow below with a white belly. The head has a broad black mask through the eyes and on the forehead. The mask is often edged by light gray. The throat is a bright yellow.
Morsels - The Common Yellowthroat is often among the bird corpses that litter city streets below today's glass-sided office towers. During autumn, but also at other times of the year, migrating birds become disoriented by the effects of electric lights left on. Also, reflective glass buildings attract the birds, which collide with the glass panes and die. In the United States alone it is estimated that about 955 million birds die each year after colliding with windows.