Were They Whoopers? You Be the Judge If you saw large white birds flying high above you, how would you identify them? Look closely at the photos of whoopers and the mystery birds. Next, use this chart to list features that are unique to each species. Observation Chart Whooping Cranes Mystery Species                                   Hints: Things you can't tell by looking at photos They fly in very small groups (usually less than 5 per group). Wingspan: 7 1/2 feet Height: 5 feet They migrate in large groups, often flying in a "v" formation. Wingspan: 9 feet Height: 4 feet   This Season Teachers Kids Orientation Registration Search Copyright 1997-2009 Journey North. All Rights Reserved. Questions or comments? Contact us.