I don't know that I'd trust an ornathologist to know how the brain chemistry works. But I do trust that they're dumb. Lacking memory isn't predictive of being dumb, but there's probably some correlation. Maybe seagulls have perfect memory but just want to flip human observers the bird.
Ornithologists do actual science, they aren't just bird watchers. An ornithologist is pretty much the only one I would trust about this because they are the ones studying the birds.
Idk man, I wouldn't trust those guys. I think some of them are being paid off by the government to defend the position that birds are real. Crazy stuff, I know.