> Calling someone a "bird brain" is honestly more of a compliment.
Well no. Some birds are flat-out dumb. Chickens for example.
Chickens are not dumb, check out:
https://thehumaneleague.org/article/are-chickens-smart https://pmc.ncbi.nlm.nih.gov/articles/PMC5306232/
One fact that I find very curious is that I see all sorts of animals killed on the road, but never chickens. And I see plenty of them by the road.
Maybe they never try to cross roads?