Researchers, including a North Carolina State University zoologist, found in a new study that three species of weasels once common in North America are likely in decline, including a species that’s considered the world’s smallest carnivore.

The findings show there’s a need to better track weasels, researchers say. With better data, they could understand the weasels’ disappearance – whether it’s due to climate change, pesticides and rodenticides, diseases, or predation from raptors or owls.

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