Note: These Challenge Questions coincide with the Spring 2006 Reports Challenge Question #3 From: by way of Journey North <susamel.biz@brounstein.com> Date: Mon Mar 27 2006 - 10:37:56 EST The whooping cranes know when to migrate when the weather changes. It starts to get colder and the birds realize it is time to head south. Instinct tells them it's time to go. Another way, is when they run out of food, which for them is the blue crab. Iselin Middle School/grade 7 Kathryn Brittany Alia Nick James Received on Mon Mar 27 10:38:00 2006 Copyright 2006 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to jn-help@learner.org