
Boreal Chickadee (Malkolm B. photo)
Migrating birds have always faced dangers. Humans have added many extra hurdles:
• We’ve destroyed critical bird habitat.
• Our pets kill birds as they rest in our yards.
• Birds smash against our buildings and windows.
• We poison birds with toxics and oil spills.
• Climate change is already affecting birds.
Fortunately, there are success stories amid the gloom. In the 1940s there were only 21 wild Whooping Cranes. Now there are 340. Huge efforts have brought California Condors back from the brink of extinction.
