Enemies (Leap Day)

Porco

Mr Spring Heads
Mr Spring Heads is a name Jon Annal called one of the members of this species, and someone decided that it was the name of the species as a whole. The name is also in plural because all enemy names on the wiki should apparently in plural form when referring to it. Because clearly, Jon Annal was referring to all of the spring headed enemies, not just that one guy in the Tweet.

So remember, if you see someone call a cat "Oliver" that species name is now "Olivers".