Gorilla mask by Kunihiko Kasahara

Diagrams in Happy Origami by Kunihiko Kasahara
Folded from a square of Momigami

Gorilla mask by Kunihiko Kasahara

Diagrams in Origami Omnibus by Kunihiko Kasahara
Folded from a square of double-sided mulberry paper

Mountain gorilla by Ronald Koh

Diagrams in Czech Origami Convention 2017
Diagrams in Tanteidan 22nd convention
Wet-folded from a square of 160gsm Canson art paper