Vertebrate (Inventory)/Bat Scratches
From LagWiki
The Bat Scratches field should be used to record stations where noticeable marks left by bats are found.
The most common sign left by bats are stains or marks on the ceiling indicating that bats used that location for roosting. These stains are from the oils and dirt left by the bats. Claw marks on soft formations are more rarely observed indicating that a bat may have rested there. An accumulation of guano may be present below a location with bat scratches.
See also