The Tortuga is travelling down a dirt road when Martin spots something blue in the sky. It's a Blue heron! One of the largest birds in North America and the largest heron. Even though the bird is blue - and not green as Chris was hoping - Chris realizes that it doesn't matter. It's not the color of the creature, but the power within. And soon the Wild Kratts are off to discover the Blue heron's amazing abilities. Science Concept: Body form shaped by hunting strategy.