In the U.S. 42 species of birds have low and steeply declining populations that put them on the brink of disaster, scientists ...

State of the Birds report identifies 112 "tipping point" species — those that have lost more than half their populations in the past five decades.

This species is one of the most widely distributed ... One of the most abundant birds in North America, the red-winged’s count was estimated at 190 million in the mid-1970s.