Hummingbirds Day 7: Pinfeathers Feathers grow inside little drinking-straw-shaped "sheaths." These sheaths flake apart, little by little, from the tips. Look carefully and see if you can spot the little feather tips breaking through. Q: Can you see where the feathers are going to grow on the head? <Back to Gallery Next> Facebook Pinterest Twitter © 1997 – 2024 Journey North. All rights reserved.