Nearly 3 Billion Birds Gone Since 1970
The first-ever comprehensive assessment of net population changes in the U.S. and Canada reveals across-the-board declines that scientists call “staggering.” All told, the North American bird population is down by 2.9 billion breeding adults, with devastating losses among birds in every biome. Forests alone have lost 1 billion birds. Grassland bird populations collectively have declined by 53%, or another 720 million birds.
“A staggering loss that suggests the very fabric of North America’s ecosystem is unraveling.”—Cornell Lab director John Fitzpatrick and study coauthor Peter Marra
The Main FindingsEven Common Birds Are Vanishing
Common birds—the species that many people see every day—have suffered the greatest losses, according to the study. More than 90% of the losses (more than 2.5 billion birds) come from just 12 families including the sparrows, blackbirds, warblers, and finches.
The losses include favorite species seen at bird feeders, such as Dark-eyed Juncos (or “snowbirds,” down by 168 million) and sweet-singing White-throated Sparrows (down by 93 million). Eastern and Western Meadowlarks are down by a combined 139 million individuals. Even the beloved Red-winged Blackbird—a common sight in virtually every marsh and wet roadside across the continent—has declined by 92 million birds.
“We want to keep common birds common, and we’re not even doing that,” said Pete Marra, a study coauthor who formerly directed the Smithsonian Migratory Bird Center and now directs the Georgetown Environment Initiative.
This Is a Problem Everyone Can Solve7 Simple Ways to Help Birds
1. Make Windows Safer, Day and Night
Simple adjustments to your windows can save birds’ lives.
2. Keep Cats Indoors
Indoor cats live longer, healthier lives. Outdoor cats kill more birds than any other non-native threat.
3. Reduce Lawn by Planting Native Species
The U.S. has 63 million acres of lawn. That’s a huge potential for supporting wildlife.
4. Avoid Pesticides
Look for organic food choices and cut out some of the 1 billion pounds of pesticides used in the U.S. each year.
5. Drink Coffee That’s Good for Birds
Shade-grown coffees are delicious, economically beneficial to farmers, and help more than 42 species of North American songbirds.
6. Protect Our Planet From Plastics
91% of plastics are not recycled, and they take 400 years to degrade.
7. Watch Birds, Share What You See
Bird watchers are one of science’s most vital sources of data on how the ecological world is faring.
- More about the 7 Simple Actions
Let’s Tell People About This
If you’re on this page, chances are birds are already important to you—but most people don’t know about this finding. Can you help us take the news to them? Share these short videos on social media. Tweet about the research. Post an image to Instagram. Or just tell a friend the old-fashioned way—it all helps.
Share these videos:
New finding says 1 in 4 birds have vanished in our lifetime. Let’s get together and #BringBirdsBack Tweet
Save these infographics and share them on your Instagram feed to help people see how the birds we know and love are faring. Many trends are downward, but some positive trends illustrate what is possible when we take action.
ABOUT THE STUDY
Critical data were contributed by citizen-science participants in the Audubon Christmas Bird Count, North American Breeding Bird Survey, and other bird-monitoring initiatives. The Partners in Flight Avian Conservation Assessment Database was a critical source for the data.