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 ...

With a population of over 27 million and counting, crows seem almost ubiquitous across the US. Their loud “caws” are hard to miss, and the tone of these cries varies depending on what the birds are ...

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