wait...humans?
In at least two episodes (this and Unlimited), the writers have ALL of the "original 7" declared humans. Both Grodd episodes.
1) They're in Gorilla City. The apes refer to them as humans. In this episode, J'onn and Hawkgirl a CLEARLY not humans.
2) In an Unlimited episode, Grodd turns all "humans" into apes. Which evidently includes Superman?
Wonder Woman is in both episodes. One can speculate she's not human either since she was sculpted from clay and her entire "tribe" is immortal.