Our 4th vertebrate on the countdown is the bird 🐦 🦅 🦉 Birds evolved alongside the dinosaurs. The bones and muscles in their wings are highly specialized. Their whole body is designed for flight, including their digestive system, which can hold off on digestion until after flight. . . . . . . . . . #vertebrateweek #animalplanet #wildlife #birds #birdsofinstagram #nature #animallovers