Headwinds, Heat and Humidity (+0 Miles) December 13, 2006: Migration Day 70 Headwinds, heat and humidity caused the 4th down-day in Terrell County, GA. The next stop is about 60 miles away, but the headwinds would mean about 2 hours of flying. Flying in warm, heavy air is very hard work for the birds. Hear Joe tell why cold air makes flying easier. Photo Joan Garland In the Classroom Today's Journal Question: Cold temps make easier flying for birds, but what do cranes do if their legs get cold? Look for clues in the photo above. (See larger view.) Joan Garland took the photo on cold Dec. 9. She said, "It was hard to tell they were cranes because they had their legs tucked up into their feathers to keep warm, instead of extended straight out behind in the usual way they fly." Now imagine you are a crane-kid in the photo. Write what it's like to fly on a cold day. Do you like cool air or warm air best? Use Joan's comment and Joe's clip to add facts and details. Migration History: Has there ever been a Day 70 before? See your Comparing Migrations Chart — and update it for today. Help the Cranes and Planes Reach Florida! Map Daily News The Chicks The Team Journey North is pleased to feature this educational adventure presented in cooperation with the Whooping Crane Eastern Partnership (WCEP). Copyright 2006 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to our feedback form.