Protogen Fursuit Head, Error by GreenyCharacter3717 on DeviantArt

user error (comm) by how2101 on DeviantArt

Protogen Head Model (no neck sorry lol) : r/furry

Protogen head I'm making! Credits in comments! : r/furry

Error the Protogen, Wiki

Yo ! I received the fursuit head of my protogen, it's incredible i love it ! ⚡ : r/protogen

There´s not a lot of Proto head references for some reason, here´s my take on them for people who have trouble with drawing heads [ Art by me ] : r/ protogen

Protogen head by JigokuFox on DeviantArt

Fursuit Takeover (Protogen Fursuit TF) by vaporeon1511 on DeviantArt

Pixilart - protogen fursuit head by furryqueen-art

The protogen head by Karnelion on DeviantArt