What amazes me about crows is the intelligence they achieve with such a small brain. That elephants and whales are highly intelligent is perhaps less impressive

What amazes me about crows is the intelligence they achieve with such a small brain. That elephants and whales are highly intelligent is perhaps less impressive. I can't think of any reasonable way to compare the intelligence of a whale with the intelligence of a crow. It's hard enough to compare the intelligence of two humans when they have different personalities and interests.