Santa Catalina Island Rattlesnakes Mating! (Crotalus catalinensis)

[Najakeeper]

*raises hand*

The video is really cool but...why are they categorized as a rattler if they don't have a rattle? Why not then name them as some other type of viper?

Because physical appereance doesn't have much to do with modern taxonomy. This species is a rattlesnake genetically speaking and just loosing the rattle doesn't kick it out of genus Crotalus. It is very closely related to Crotalus ruber.