Alaska wildlife officials push to continue its aerial predator-control program despite a court ruling that says the program ...

Reindeer are a species of deer also known as caribou in certain regions ... and protozoans in the stomach of a reindeer break down lichen compounds into sugars that the animals use for sustenance.

FEEDING: Although caribou eat a wide variety of foods, winter foraging is limited almost exclusively to ground and arboreal lichens. Caribou in the Selkirk population eat lichens for up to six months ...

This meant that resident caribou were relatively free to roam and spread out with little risk of high predation as they fed on their favoured food, terrestrial lichen. Following seasonal cycles ...

Human-caused changes to weather patterns have also forced a redistribution of caribou based on where they can continue to access sufficient snow and lichen, the researchers write. The toll taken on ...

caribou still prefer to graze on lichen. They only eat the top centimetre or two, which forces the lichen to grow back to be eaten at another time; a kind of lichen farming! The videos also showed ...

These female caribou — part of North America's largest ... trudging through the snow using their scoop-shaped hooves to dig for lichen clinging to rocks and shrubs buried beneath the snow.