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

Lifelike robots made in Hong Kong meant to win...

Jan 16, 2018

David Hanson envisions a future in which AI-powered robots evolve to become "super intelligent...

China raises tariffs on US pork, fruit in trade...

Apr 2, 2018

China raised import duties on a $3 billion list of U.S. pork, fruit and other products in an...

China urges US to avoid damaging business...

Apr 26, 2018

China urges Washington to avoid damaging business confidence following report U.S. investigating...

China first home-built aircraft carrier completes...

May 18, 2018

China says its first entirely home-built aircraft carrier has successfully completed five days of...

China's Huawei says it hasn't collected Facebook...

Jun 6, 2018

Facebook has acknowledged it shared user data with Chinese handset manufacturers, including...

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!