Sloths, moths, algae may live in three-way benefit pact
Insects and green slime may justify slow mammal’s risky descent from trees

MAMMAL’S LITTLE HELPERS To make a living as one of the rare mammals that eats only tree leaves, a brown-throated three-toed sloth may be getting some help from mating moths and sloth-specialist algae.
Christian Mehlführer/Wikimedia Commons