Odors: While you may not recognize the smell of guano or urine from one bat, the odors due to a colony of bats are visible. Their urine has a solid ammonia odor that homeowners have called musty, acrid, or https://bookmarkcitizen.com/story17769632/how-much-you-need-to-expect-you-ll-pay-for-a-good-bats-in-gable-vents