Whitewash from an owl

Side-by-side images showing owl excrement on a tree branch
Photo By/Credit
Mael Glon, Ph.D./USFWS
Date Shot/Created
02/08/2023
Media Usage Rights/License
Public Domain
Image
Over time, as owls roost in trees, their excrement can leave white streaks known as "whitewash" on the tree, ground, or nearby vegetation.