* Reindeer and Caribou: These animals are famous for their lichen diet, especially during winter when other food is scarce.
* Deer: Various deer species also eat lichen, especially in the winter.
* Moose: Similar to deer, moose will graze on lichens, particularly in areas with a lot of ground lichens.
* Small Mammals: Mice, voles, and rabbits are known to eat lichen, especially when other options are limited.
* Insects: Certain types of insects, like some moths and butterflies, can feed on lichens.
* Birds: While not a primary food source, some birds may eat lichen occasionally, particularly if it's a component of their nesting material.
* Snails and Slugs: These gastropods can graze on lichens and sometimes leave trails of slime across the lichen.
It's important to remember that lichens are slow-growing organisms, and excessive grazing can negatively impact their populations.