Assertion: caribou's food source | /r/HasProperty | lichen
Facets:
Source sentences:
text: The boreal forests offer favorable snow conditions that allow the caribou ready access to their favorite winter food source, lichens, of which they need to eat approximately 3 kilograms each day.
text: The main food source for reindeer in the winter months is lichen.
text: Their main food source is lichens, which gives caribou an advantage in the more harsh northern areas of its range where vegetation is scarce.