Why does a turkeys wattle change color?

A turkey's wattle changes color due to changes in blood flow. When a turkey is aroused or excited, more blood flows to the wattle, causing it to become redder and more engorged. This is similar to how a human's face may turn red when they blush.

The wattle is a fleshy growth that hangs from the neck of a turkey. It is made up of erectile tissue that can fill with blood, causing it to change color and size. The wattle is used for communication between turkeys and can also help regulate the bird's body temperature.