Wrong kind of archosaur. That's a pterosaur, not a dinosaur. Calling a pterosaur a bird is like calling an alligator a sauropod.
>>37077342Not all reptiles are birds, but all birds are reptiles. They're dinosaurs, and crocodilians are closer to them than to other reptiles, so they fall in the Sauropsida/Sauria/Reptilia/whatever you want to call it class in modern biology.