This is a Rainwing, a type of dragon. You can find these in the book series Wings of Fire. Have fun reading, if you do!!
A quote from one of the books (Wings of Fire: Winter Turning) describing Rainwings:
(SPOILERS)
Description: scales constantly shift colors, usually bright like birds of paradise; prehensile tails
Abilities: can camouflage their scales to blend into their surroundings; shoot a deadly venom from their fangs
Queen: Queen Glory
Students at Jade Mountain: Boto, Coconut, Kinkajou, Siamang, Tamarin
