This trap is very effective for almost every species of raptor when baited with a sparrow.  Clip the sparrow jesses (not included) to the swivel and you're all set!  It is designed to catch raptors as they fly by, attempting a "grab and go" of the bait bird.  Trap is roughly 18" in diameter, stands about 7" tall, and comes with 130# Dacron drag line.

Phai Hoop / Padam Ring Trap