"Staggering" decline in America's bird population
The global bird population, declining rapidly.
New study reveals massive decline in North American bird population
Why bird populations are declining? [CC]
Is The Bird Population Declining?
Yes, the American bird population is in decline
North America has lost nearly 30 percent of its bird population in the last 50 years
What's causing Helena's bird population decline?
How One Man's Mistake Killed 750,000,000 Birds
North America's 3 Billion Lost Birds | SciShow News
2 out of 3 North American bird species face extinction. How we can save them
Tennessee birds part of North American population decline
3 Billion Birds Lost
Bird population declining in Michigan
Bird Population Decline Across North America | Connecting Point | Nov. 14, 2019
Conserving North America's bird populations
Bird populations in North America have declined by 2.9 billion since 1970, study finds
Bird's Population Decline | Introduction Video | Adversified Nature
Maine's bird population is declining, and experts say humans are playing a significant role
Bird population faces drastic decline: Habitat loss and building collisions cited as primary causes
