Download or read book Do All Birds Fly? Animal Book for Children | Children's Animal Books written by Baby Professor and published by Speedy Publishing LLC. This book was released on 2017-04-15 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike land animals, birds have hollow skeletons that’s why they can fly to the sky. But there are large birds who are too heavy to fly like the ostrich and the penguins. So why are birds called birds? What makes them fly other than their hollow bones? Encourage your child to discover the answers by going over the pages of this book today!