The first State of North America's Birds report finds that of 1,154 bird species that live in and migrate among Canada, the U.S. and Mexico, 432 are of "high concern" due to low or declining ...

Nearly two-thirds of all bird species in North America will be at an increased risk of extinction if the world does not act to reign in climate change, a new report has found.

Object Details Author Bull, John L Notes Maps on lining papers. Includes index. Date 1985 C1985 Call number QL682.B58 1985X Type Identification Physical description 157 p. : ill. (some col.) ; 20 cm ...

According to a study released on Sept. 19, 2019, North America’s skies are lonelier and quieter as nearly 3 billion fewer wild birds soar in the air than in 1970.

There are nearly three billion fewer birds in Canada and the United States than there were half a century ago, a new study estimates. It counted a loss of 2.9 billion birds compared with 1970 ...

Audubon spent seven years investigating the likely effects of the changing climate on 588 bird species in Canada and the U.S., representing about three-quarters of all bird species on the continent.

Across North America, three-fourths of bird species are in decline, according to a sweeping study of avian populations published Thursday, the latest sign of a slow-moving extinction crisis that ...

A new study has found that there are 2.9 billion fewer birds in Canada and the U.S. than there were in 1970. That includes the loss of two out of every five baltimore orioles. (Gary Mueller ...

North American bird populations are shrinking most rapidly in the very areas where they are still most abundant, according to a new study leveraging citizen science data for nearly 500 bird species.

Analysis of nearly 500 bird species across North America has found that three-quarters are declining across their ranges, with two-thirds of the total shrinking significantly.