Cardinal by Yoo Tae Yong

Diagrams in New Generation of Supreme Origami by Makoto Yamaguchi
Folded from a square of Duo Thai paper

North American Cardinal by Robert J. Lang

Diagrams in Extraordinary Origami by Marc Kirschenbaum
Folded from a square of duo origami paper

North American cardinal by Roman Diaz

Diagrams in AEP convention 2012
Diagrams in Bogota Origami Convention 2016
Diagrams in Quadrato Magico Magazine 102
Diagrams in The Beauty of Origami by Makoto Yamaguchi
Diagrams in The Paper Magazine 105
Folded from a square of duo origami paper

North American Cardinal by Roman Diaz

Diagrams in Origami Essence by Roman Diaz
Folded from a square of double-sided Unryu paper

North American Cardinal - singing by Roman Diaz

Diagrams in Origami Essence by Roman Diaz
Folded from a square of double-sided Unryu paper