Here's my entry! Thanks for the contest.

I have two ideas for a theme. The first one I think might be some welcomed comic relief: birds pooping and places where there's lots of bird poop, like sea rocks, under roosts, etc. Especially action poop shots!
Second one, I can't remember if I suggested it or not, is corvids. There are so many birds in the corvid family. Ravens, rooks, crows, jackdaws, magpies, jays, choughs...