Duck-billed platypus by Matsuno Yukihiko

Diagrams in NOA Magazine 575
Folded from a square of Duo Thai origami paper

Platypus by Marc Kirschenbaum

Diagrams in Creative Origami Kit by Marc Kirschenbaum
Diagrams in The Paper Magazine 43
Folded from a square of duo origami paper

Platypus by Mitsuda Shigeru

Diagrams in Cute and Funny Origami by Mitsuda Shigeru
Diagrams in JOAS 2024 Special Issue
Folded from a square of Shadow Thai origami paper