Reptiles
Reptiles are in a Class by themselves, literally—Class Reptilia. The Class comprises four Orders: Crocodylia (including Crocs, Gators, and Caimans), Snakes and Lizards, Turtles and Tortoises, and Rhynchocephalians. I had never heard of Rhynchocephalians. For a good reason, there is one extant species in the whole Order, the Tuatara, endemic to New Zealand. They look like lizards but have a distinct lineage. Now, of course, I have to see one.
It took me ten years, but I have finally stopped saying Alligator when seeing a Crocodile in Africa. I used not to pay much attention to lizards. Now I actively look for them when I’m in the bush. Turtles and tortoises are just seriously cool. Well, all reptiles are pretty cool.