Jane Park 
Hidden Animal Colors [EPUB ebook] 

Why should the bright and flashy animals get all of the attention? If you look closely at some seemingly ordinary animals, you may find a colorful surprise. A lizard is brown. A hippo is gray. But wait! The lizard has a blue tongue to scare predators, and the hippo has pink "sweat" that protects it from the sun! Brilliant photos accompany author Jane Park’s rhyming nonfiction text in this playful exploration of animals’ hidden colors.