The birds are leaving all this crap behind. And by crap, I do not mean shit.
Are they seeds? Why are birds leaving seeds in my birdbath? (I guess it's their birdbath, but I have title to it, right?)
Are they softening the seedcoats? Birds don't care about germinating new plants. They just want to eat, right? Maybe the birds know soaking these seeds makes the seeds taste better. Birds can't taste capsaicin, but maybe there are other tastes birds cannot abide.
Softening the seedcoat might make the seed more digestible. But how would a bird know that? A bird doesn't understand that it digests its food. And birds eat plenty of seeds without soaking them first. How would they know these seeds need soaking?
And what about the seed? What's it getting in the bargain? (And what kind of seed is this anyway? I can't take a good picture of it. It's kinda spotted, and when I cut it open, it's white inside.)
Does the seed expect a bird to soak it in water before it germinates? Birds and seeds evolved without birdbaths. Where would a bird find water right now if my birdbath wasn't here? It's been cold and frosty. There is no standing water anywhere right now. There would have been streams without all these buildings, but leaving food in streams doesn't seem like a good idea to me.
Am I being too rational about this? Birds have tiny little brains. Maybe they're crazy. Maybe the bird vomited these seeds in my birdbath. Eww!
P.S. Please share your ideas about this in the comments.