Montroll's Sea Turtle

Yes, the model is folded from a single square without requiring separate pieces for the shell, head, or four flippers. That one-sheet construction is characteristic of John Montroll's approach to representational origami.

The folder must allocate enough paper for four broad flippers, a head, and a raised shell from the same square. Shaping those features cleanly involves more layers and precision than a basic beginner turtle.

A thin, strong origami paper is easier to manage because several layers accumulate around the body and shell. A larger square also gives more room to form the flippers and head accurately before attempting a smaller display version.

The shell emerges through three-dimensional shaping and the redistribution of layers rather than cuts or added pieces. Gentle curved shaping at the end helps distinguish the domed body from the flatter flippers.