" You are 50 percent less likely to see a bumblebee than you were in 1974. Butterfly populations have decreased, according to one estimate, by 33 percent in the last twenty years. Three billion birds have disappeared from North American skies in the past five decades. Audubon’s Birds and Climate Change Report warns that half of all birds on our continent are at risk, "

― Sy Montgomery , The Hummingbirds' Gift: Wonder, Beauty, and Renewal on Wings