Mammoth by Kunihiko Kasahara

Diagrams in Cute! Cool! Beautiful! Animal Origami Book by Kunihiko Kasahara
Diagrams in NOA Magazine 514
Folded from a square of double-sided unryu paper

Mammoth by Makoto Yamaguchi

Diagrams in Cute Animal Origami by Makoto Yamaguchi
Diagrams in Tanteidan 12th convention
Diagrams in The Beauty of Origami by Makoto Yamaguchi
Folded from a square of origami paper