Bears that rub trees reproduce more
In bear country, it’s not uncommon to notice the evidence of a bear rubbing against a tree, even if you don’t catch it in the act. Claw marks may be etched in ...
offspring
Bluebird cares for another species’ offspring
Researchers captured footage of a male eastern bluebird (Sialia sialis) feeding young tree swallows (Tachycineta bicolor) while studying the effects of gas ...