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Items you will need
Nylon screening or bird netting
Their ability to eat up to a thousand mosquitoes in an hour make bats pretty good neighbors. But if they've decided to roost in your house or another section of your property, it's time to move them to a different part of the neighborhood. Here's how to safely relocate bats.
Figure out where in your house or property the bats are flying in and out of. Dusk is the best time to watch for this, since this is when the bats will begin flying out in search of food. Look for telltale signs of bat occupancy, such as dark, pellet-like droppings. You may be able to hear them moving about in the roost during the day if they are somewhere in your house.
Install one-way screening over the entrance or entrances so the bats can fly out but can't get back in. This is done by attaching the screen several inches above the top of the opening and along the sides, leaving the bottom of the screen hanging over the bottom of the entry by several inches. The bats will be able to push their way out but will be unable to reenter.
Install a bat house on a nearby tree, post or other available structure. Bat houses can be easily built or bought (see Resources below). If possible, place some of the bat guano (droppings) on the new house to make it more familiar to the bats. The bat house should be hung at a height of at least 15 feet and in a location where the sun will warm it. Make sure the bat house has good ventilation, as well as nylon screen or plastic mesh stapled on the inside walls and ceiling to provide footholds for the bats.
Wait 7 to10 days after installing the one-way screening for all the bats to leave, then permanently seal the openings.