Tool use is so rare in the animal kingdom that it was once believed to be a uniquely human trait. While it is now known that some non-human animal species can use tools for foraging, the rarity of ...

This is a schematic illustration of the study rationale. New Caledonian crows consume a range of foods, but require tools to extract wood-boring beetle larvae from their burrows. These larvae, with ...

THE AMERICAN CROW (Corvus brachyrhynchos) is commonly seen year-round in Frederick County. In winter the "caaw, caaw, caaaw" sound seems louder with the leaves down, as the crows communicate among ...