WASHINGTON — Billions fewer birds are flying across North American skies than decades ago and their population is shrinking ever faster, mostly due...

By SETH BORENSTEIN, Associated Press WASHINGTON (AP) — Billions fewer birds are flying through North American skies than decades ago and their...

By SETH BORENSTEIN, Associated Press WASHINGTON (AP) — Billions fewer birds are flying through North American skies than decades ago and their...

A new study finds North American bird populations keep dropping, and that decline is...

A new study finds North American bird populations keep dropping, and that decline is...

A new study finds North American bird populations keep dropping, and that decline is speeding up for many species. ......

A new study finds North American bird populations keep dropping, and that decline is speeding up for many species. ......

A new study finds North American bird populations keep dropping, and that decline is speeding up for many species. ......

A new study finds North American bird populations keep dropping, and that decline is speeding up for many species. ......

A new study finds North American bird populations keep dropping, and that decline is speeding up for many species. ......