# How to Recognize Eggshell

### Shape

* Semi-rounded or semi-spherical
* Elongated oval
* Perfect sphere and more
* Out here, the Maiasaura eggs are semi-spherical and oval in shape
* Troodon eggs are shaped more like an elongated oval
* Theropods tend to have eggs in the shape of elongated ovals
* Herbivores, like Maiasaura, tend to have eggs more spherical in shape 

### Texture

* Can have bumps and ridges 
* Can have small pits or be almost perfectly smooth

### Color

* They come in many colors
* Out here we tend to see black eggshell

### Size

* Size can vary
* Out here we have seen eggs the size of cantaloupe (whole egg)
* A fraction of a millimeter in thickness

### Example of eggs found out here

![](https://lh7-us.googleusercontent.com/XKxd2EdSizXcWBx-QTTaKF6PWqmlXYi6Dawb-pJr80fM4tBpBWHOqHvkKlN-2wQioqUQRk84AxxWk9K4hOEC65jm_-1ZIwKBQxYQ8TuHGetEMfEotNWqB07DljPSKXWdoowmjQtFjtux)

#### Maiasaura eggshell

![](https://lh7-us.googleusercontent.com/cY8qwl8EJ6e52AW9Ndn_QehGwhjkP6PYBgJB8INyRdt7QsUzye3sfYvyehDzj7o8FwtrlYe7fr9UlwoqWicUAa3wW-RULZPdw15iLiJ-CxHTLTyasvy4GOb2TObApZnHWZHBuP3GWk5n)

* (A) Troodon; 
* (B) probably hadrosaurian; 
* (C) unidentified egg-layer