That snake on your hummingbird feeder? A gray rat snake—non-venomous, but an adept climber and bird predator. Snake expert Jim Rodgers confirms it can strike and injure hummingbirds. You did the right thing gently shooing it away with a broom.
Rat snakes are beneficial for rodent control but will eat birds and eggs if they can reach them. Consider a baffle on your feeder pole to deter climbers. And keep the feeder away from trees or structures the snake can use as a bridge.

Gray rat snake on hummingbird feeder

Close-up of snake on feeder
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