Where have the wild birds gone? 3 billion fewer than 1970

WASHINGTON — A comprehensive study shows there are nearly 3 billion fewer wild birds in North America than in 1970.

The new study finds that the bird population in the United States and Canada was probably around 10.1 billion nearly half a century ago and has dropped 29% to about 7.2 billion birds.

Study lead author Kenneth Rosenberg, a Cornell University conservation scientist, says the thinning of the flocks is happening before our eyes but is so slow we don't often notice.

Rosenberg and colleagues projected population data using weather radar, which captures flocks of migrating birds, 13 different bird surveys going back to 1970 and computer modeling to come up with trends for 529 species of birds.

The study is in Thursday's journal Science.

You may also like these

China targets $3 billion of US goods in tariff...

Mar 23, 2018

China lists $3 billion of U.S. goods including pork and steel pipe for possible retaliation in...

Chip Wars: Tech rivalry underlies US-China trade...

May 3, 2018

Chip wars: US-China trade tensions underscore intense rivalry over key semiconductor expertise

China tech giant sidelined, US imports held amid...

May 10, 2018

China tech giant sidelined, US imports held amid trade spat

China: Smaller trade surplus, OK. But tech...

Jun 4, 2018

China says it will narrow its trade surplus with the United States but rejects pressure to change...

Tesla announces deal for Shanghai factory

Jul 11, 2018

Tesla announces plans for Shanghai factory

Search
All Stories
Trending

About Us

Science Tech Today is all about the present with what’s new in the Science and Technology world. “Keep up with today, and don’t be left behind.”

Subscribe Now!