7 Ways To Be Bat Friendly In Your Garden! According to the Maryland Dept. of Natural Resources, one little brown bat can easily catch 1000 mosquito sized insects in an hour. Plus, their guano (poop) is an excellent natural fertilizer for your plants. Have a few trees or large shrubs in the yard, even small trees such as dogwoods, serviceberry, buttonbush, spicebush, honeysuckle shrubs. Turn off night lights. Urban areas can be confusing for bats as there is constant light throughout the night. Turning off backyard lights can help bats locate the night flying insects. Plant stinky or fragrant...