See what the ruby-throated hummingbird has in common with the rofous hummingbird. Learn what sets it apart from the turkey vulture. Readers will compare key traits of ruby-throated hummingbirds--their appearance, behavior, habitat, and life cycle--to traits of other birds. Charts and sidebars support key ideas and provide details. Through gathering information about similarities and differences, readers will make connections and draw conclusions about what makes this animal a bird and how birds are alike and different from each other.