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Do bats hibernate in the winter in Iowa

My daughter has what sound like bats in her garage. It is very cold in Iowa now and it seems like they should be departing. It is an attached garage9not heated) so it seems like they will not have a food source. Will they leave?How bit a hole do they need to get into the nesting area?

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Not all bats will migrate for hibernation, especially if they've found an inviting place to stay. They only need a hole big enough to squeeze their bodies through, which could be no more than a half-inch wide, to get into a nesting area. Most bats live off of insects, so you may be surprised at how well they are foraging. If they've set up house in the garage, they won't leave on their own. Look for bat droppings, and watch to see if they are coming and going. Concentrations of bat droppings can actually cause a health hazard to humans. Sound emitters and ammonia are often recommended to get rid of bats, but the do NOT work! The only way to get rid of them is to physically remove them, and then seal up the area so that can't get back in.

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Yes, They do hibernate in the cooold Iowa winters.

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