Other
National Aviary: Curriculum: Wings to Fly
Richly illustrated interactive activity leads you through an investigation of bird wings. Includes interesting comparisons of the bones in a bird's wings with those in human arms and of the design of wings in birds versus planes.
Open Door Team
Open Door Web Site: Movement in the Air
A site on how birds fly discusses their anatomy that allows them to fly. Also discusses the role that feathers play in flight. Also includes a section which discusses other insects that fly.
Soft Schools
Soft Schools: Birds on the Move: Migration
Take this interactive, multiple-choice quiz over bird migrations, then review your score and any missed questions at the end.