根据最新报告，美国鸟类数量正在急剧下降，超过100个物种在过去50年里数量减少了一半以上。栖息地丧失和气候变化是主要原因，只有少数水鸟数量有所增加。
The U.S. bird population is declining at an alarming rate, according to a report published Thursday by an alliance of science and conservation groups.
Habitat loss and climate change are among the key contributing factors to the bird population losses, according to the 2025 U.S. State of the Birds report.
More than 100 of the species studied, have reached a "tipping point," losing more than half their populations in the last 50 years. The report revealed that the avian population in all habitats is declining, including the duck population, previously considered a triumph of conservation. "The only bright spot is water birds such as herons and egrets that show some increases," Michael Parr, president of the American Bird Conservancy, told Reuters.
The decline in the duck population fell by approximately 30% from 2017, but duck population numbers still remain higher, however, than their 1970 numbers, according to an Associated Press account on the report.
"Roughly one in three bird species (229 species) in the U.S. requires urgent conservation attention, and these species represent the major habitats and systems in the U.S. and include species that we've long considered to be common and abundant," Amanda Rodewald, faculty director of the Cornell Lab of Ornithology's Center for Avian Population Studies told Reuters.
Included among the birds with highest losses, Reuters reported, are the mottled duck, Allen's hummingbird, yellow-billed loon, red-faced cormorant, greater sage-grouse, Florida scrub jay, Baird's sparrow, saltmarsh sparrow, mountain plover, Hawaiian petrel, Bicknell's thrush, Cassia crossbill, pink-footed shearwater, tricolored blackbird and golden-cheeked warbler. Some of the birds in this "red alert" group are already protected under the U.S. Endangered Species Act, the news agency said.
"For each species that we're in danger of losing, it's like pulling an individual thread out of the complex tapestry of life," Georgetown University biologist Peter Marra. who was not involved in the new report, told AP. While the outlook may seem dire, it is not without hope, said Marra, who noted the resurgence of the majestic bald eagle.