1. http://www. physics. unl
Department of Physics & Astronomy University of Nebraska-Lincoln Lincoln NE Embryology

2. Animals that lay eggs
Embryology for Humann’s 3rd Grade class—a supplement for the 3rd Grade Embryology Curriculum

3. Birds

4. Bird eggs come in all shapes and colors

5. Very large
Very small

6. The ostrich lays the largest eggs

7. Iguanas, monitors and alligators all lay eggs
Reptiles
Iguanas, monitors and alligators all lay eggs

8. Reptile eggs are soft and squishy

9. Turtles lay eggs too!

10. Mammals
Echidna
Two mammals lay eggs
Both live in Australia

11. Platypus