Nautilus reports
Crows and ravens, which belong to the corvid family, are known for their high intelligence, playful natures, and strong personalities. They hold grudges against each other, do basic statistics, perform acrobatics, and even host funerals for deceased family members. But we keep learning new things about the savvy of these birds, and how widespread that savvy is among the corvid family.
Read more at : Crows May Be Smarter Than We Thought
Natural History Wanderings 
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