"Squirrels, jays, and magpies will snatch your peanuts if you don't hide your food."
The verb phrase "will snatch" is suitable in the sentence because it conveys a future action. In the context of the sentence, it implies that if you don't hide your food, squirrels, jays, and magpies are likely to take or grab your peanuts in the future.
The use of "will" indicates a future event or action, and "snatch" is a fitting verb to describe the quick and sudden movement these animals might make to take the peanuts. "Squirrels, jays, and magpies will snatch your peanuts if you don't hide your food."