fat-spacebird replied to your post:i have a lot of random knowledge about a wide...
say words about hoatzins! they’re like smelly pterodactyls.
The only surviving member of their family/order, and if i remember right they literally smell like crap. The smell is because they have a funky digestive system - they've developed a massively oversized crop. They eat food, and then let it ferment inside the crop/essentially go rotten, which is why they smell so bad. It's the same thing that cattle, goats, camels and etc do! Except it's in a bird, which is pretty unusual.
The most interesting thing about hoatzins can only be found in their babies - when they're not yet fully grown chicks have claws on their thumbs and their first digit, and they use them to climb trees. Now, the digits of modern birds have been fused for a REALLY long time, so hoatzins make more sense when you note that filholornis, a suspected close relative, was around 34 MILLION years ago. These are some prehistoric ass birds.
(Archaeopteryx is far older than filholornis, living 150 million years ago and some 116 before filholornis, but in it you can find the origins of those wing claws, which in turn most likely originate from theropod dinosaurs and in specific the coelurosauria (small feathered dinosaurs)).