Habitat destruction, pollution and other problems have left nearly a third of the nation’s 800 bird species endangered, threatened or in serious decline, according to a study issued on Thursday.

Described as the most comprehensive survey of American bird life, the report, "The U.S. State of the Birds," analyzed changes in the bird population over the last 40 years. “This report should be a call to action,” Interior Secretary Ken Salazar said at a news conference in Washington.

Citing surveys by government agencies, conservation organizations and citizen volunteers, the report said that the population of grassland birds had declined by 40 percent and birds in arid lands by 30 percent. It estimated that 39 percent of bird species that depend on American coastal waters were in decline.

Many forest birds are threatened by urban sprawl, logging, wildfires and “a barrage of exotic forest pests and disease,” the study said.