In self-defense, one of the Talosians made himself look like the anthropoid ape to Pike, but this disguise was not successful. (TOS: "The Cage")
The anthropoid ape was, like the humanoid bird, played by Janos Prohaska. The costume was a creation by master sculptor Wah Chang and was a reuse from the TV series The Outer Limits, for which both Prohaska and Chang also worked. (Star Trek: The Magazine Volume 3, Issue 9, p. 71) Originally it was used for the Calco creature in the episode "Fun and Games". In the original scripts for "The Cage", the creature is described as the "anthropoid-spider," but the final credits give the name anthropoid ape.