I think crows are probably smarter. But we probably arent up to being able to reverse engineer brains of crows. Maybe just playing around at it.
Present list i believe is: 1. lab mice; 2. lab rats; 3. crows; 4. octopi; 5. pigs; 6. chimps; ending on the human brain.
The intelligent birds, thought to be a nuisance by some, learn from consequences and can recognize resemblance between objects.
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