Cobra by Kunihiko Kasahara

Diagrams in Happy Origami by Kunihiko Kasahara
Folded from a square of patterned origami paper

King cobra by Ronald Koh

Diagrams in Origami Deutschland 2003
Diagrams in Origami USA Convention 2002
Diagrams in Pajarita Magazine 79
Diagrams in Pajarita Magazine 80
Folded from a long rectangle of brown wrapping paper

Snake by Jun Maekawa

Diagrams in Genuine Origami by Jun Maekawa
Folded from a square of animal-patterned origami paper