Another reason the Environmental Center of San Diego continues to work so hard to protect the environment.

NY Times – By Carl Zimmer – Published Sept. 19, 2019
Updated Sept. 20, 2019, 11:03 a.m. ET

The skies are emptying out.

The number of birds in the United States and Canada has fallen by 29 percent since 1970, scientists reported on Thursday. There are 2.9 billion fewer birds taking wing now than there were 50 years ago.

The analysis, published in the journal Science, is the most exhaustive and ambitious attempt yet to learn what is happening to avian populations. The results have shocked researchers and conservation organizations.