Baby dinosaur by Michael G. LaFosse

Diagrams in Ultimate Origami for Beginners by Michael G. LaFosse and Richard L. Alexander
Folded from a square of textured origami paper

Fossil by Marc Kirschenbaum

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

Prehistoric bird by Roman Diaz

Diagrams in Licence to Fold by Nicolas Terry
Folded from a square of double-sided mulberry paper