Tag: declines

About 48% of bird species around the world are facing population declines, according to a new global analysis. The finding comes after a 2019 study showing nearly 3 billion breeding...

For many bird species, scientists don’t have much information to figure out whether their populations are rising, falling or staying about the same. To get a better sense, researchers turned...

The likelihood of bumblebee populations surviving in a given place has declined by more than 30%, according to new research, and researchers point to climate change as the prime reason....

When the once common rusty-patched (Bombus affinis) bumblebee disappeared from Canada by the early 2000s, researchers became worried. What would this mean for less common bumblebee species? “This raised the...

Monarch butterfly (Danaus plexippus plexippus) populations have declined steeply since the 1990s, prompting the U.S. Fish and Wildlife Service to determine that monarchs may warrant listing under the federal Endangered...

Researchers know that frogs, toads and salamanders have been facing steep declines in recent decades, but is climate change the main driver? Putting together data from across North America, including...