The early worm catches the bird

said to advise someone that they will have an advantage if they do something immediately or before anyone else does it

Thank god I hoarded TPs at Costco in February. The early worm catches the bird and the latecomers get nothing

Catch these birds

Means to hold your hands back from swinging into a fight.
"Hold back my hands"
hands = birds

Steve: This guy been hitting on me and my friend all night.

Joe: If he comes at me, he's catch these birds
Steve: Hold on!
Joe: He's gonna get it