Cast net
Gamo Whisper with PBA pellets and a trashbag.
stake down a dozen snelled hooks and put corn on hook. :innocent
Size 6 treble hook works better :rolleyes
Since you've obviously agreed to catch them alive and unharmed, I would suggest a chicken wire trap about 6x6x6 with a trap door and 20 lbs of scratch feed. Sprinkle some out in little piles (key word being little) leading to the trap, with larger piles in the trap. Sit back, watch em go in the trap (all of them) and then spring the trap. Otherwise, you could probably hire you a Gaucho to rope em for ya. My neighbor is a Mexicowboy, and he can rope a robin if you pay him.
Or just set one of these up in your yard...
https://www.youtube.com/watch?v= http://www.youtube.com/watch?v=MX-8WIg6LMI&feature=related

