Lichens on the Nushagak Peninsula are a critical food source for the caribou that live there. But as the herd has thrived, exceeding management goals, they are depleting the complex composites.

Lichens on the Nushagak Peninsula are a critical food source for the caribou that live there. But as the herd has thrived, exceeding management goals, they are depleting the complex composites.

Lichens cover the Nushagak Peninsula. They range from mottled green and gray, to yellow and brown, spreading in moss-like patches across the tundra. But as the peninsula caribou herd multiplies ...

If our group sees a caribou from here on up the river, it’s fair game for both me and Risi. After trekking 10 miles upriver, we find a flat patch of lichen from which we can glass all evening. I look ...

Migratory tundra caribou (Rangifer tarandus) are listed as vulnerable by the IUCN Red List and have lost more than half of their total abundance since the 1990s.