For many years I didn’t see any birdshit on my front sidewalk. This year I’ve been hearing frequent competitive conversations among one species of bird, and now I’m seeing birdshit in one place on the sidewalk.
Two weeks ago I mowed the yard and swept the sidewalk. Felt proud after creating a bit of beauty. The next day I saw a big white splash, apparently three deposits in the same spot. Rain and wind faded it. Just after another mow and sweep, another white splash on the same spot.
Mammals play poop games with trees and other vertical objects. Do birds compete in the same way?
Polistra's Mill 