Green Guru: How High Do Migrating Birds Fly? By Susan CosierMarch 29, 2011 By Susan CosierMarch 29, 2011 Popular Stories Peregrines—and a Photographer—Bunk Out at Chicago Man’s Apartment Why Do Parrots Talk? Ornithologists Own up to Their #fieldworkfails Why Are Some of England’s Pigeons Pink? Video: Hummingbirds Are Groove-Tongued Wonders R Support Bird Safe Buildings Building collisions kill millions of birds. A new bill would reduce deadly collisions at federal buildings. Take Action Watch Live Birds Follow the Atlantic Puffin family wherever you go. Watch the Birds You Can Make a Difference Save birds and their habitats with a donation to Audubon today. Donate to Save Birds Spread the word. It’s the least you can do.