To escape predators, some insects developed the ability to fly. As animals emerged from the water, the need to evade predators increased. Since flying creatures were an inaccessible food source, some predators might have yearned to take to the air themselves. In fact, several groups of reptiles attempted to develop the ability to fly.
CHIN

© 2001, CHIN. All Rights Reserved.

Teachers' Centre Home Page | Find Learning Resources & Lesson Plans