Sea ducks such as Common eiders, grassland birds such as Western meadowlarks and Lark buntings, and forest species such as Pinyon jays in the West and Bachman's sparrow in the East are among a wide variety of bird species that are in serious declines,

This year's State of the Birds report has worrisome updates on the population numbers for U.S. birds — including the Allen's hummingbird.

For several decades, waterfowl stood out as a conservation bright spot with populations of ducks growing nationwide even as many other groups of birds declined in the U.S.