Deforestation is responsible for most of the bird population decline.
The Earth is greener than ever.
We have more trees in the US than at any time in history.
You are wrong.
“Deforestation is responsible for most of the bird population decline.”
However...
Reforestation Rates-
In the United States, deforestation has been more than offset by reforestation between 1990 and 2010. The nation added 7,687,000 hectares (18,995,000 acres) of forested land during that period. The trend in reforesting areas has been driven by organizations such as the U.S. Forest Service and the Arbor Day Foundation. Reforestation efforts were critical to maintain forest cover starting at the beginning of the 20th century, and they are the reason that there is a net positive trend in forest growth today.
Except the U.S. has undergone massive re-forestation.