Compared to a robin it's bigger/smaller/fatter/thinner.....

Now that I know what a kestrel is I can begin to learn how to draw one!  These are small raptors and I was truly surprised to see one on a telephone wire in town.

Along the way I also learned - you probably already knew this - that the American Robin is the standard by which birds are compared.  A kestrel is larger than a robin, a hummingbird is smaller, that sort of thing.

You might need that bit in a crossword puzzle sometime, I'm always surprised by what random trivia is exactly the answer to some strange clue.