Caribou crossing the frozen Porcupine River upstream from Old Crow in the Yukon Territory became trapped when the river’s ice began breaking up. A group of caribou is trapped on an ice floe on the ...

The Western Arctic Caribou Herd, once the biggest in Alaska, is faltering, having fallen from a high of 490,000 animals in 2003 to only 152,000 as of 2023. But to the east, the Porcupine Caribou Herd ...

The caribou herd that is at the center of the debate over oil drilling in the Arctic National Wildlife Refuge has declined by about a third over the past eight years, according to state biologists.

A group of Western Arctic Herd caribou pause in front of mountains in Kobuk Valley National Park during fall migration in 2016. The Western Arctic herd, one of the largest in the world, has been in ...