These two accipiters can be tough to tell apart, especially when they aren't together.

Don Freiday provides help with a new blog post --26 ways in all.

Here's a sample:

"We've gotten way better at sharpies and coops, but anyone who tells you they have no trouble telling these two apart is at best wrong and at worst a liar. Everybody gets a few wrong."

You can read it here.

(Thanks, Don!)