Then there's crows and ravens... https://www.sciencealert.com/crows-ravens-corvids-best-birds-animal-intelligence https://www.sciencealert.com/crows-ravens-corv

Then there's crows and ravens... https://www.sciencealert.com/crows-ravens-corvids-best-birds-animal-intelligence https://www.sciencealert.com/crows-ravens-corvids-best-birds...