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10 Cards in this Set

  • Front
  • Back
What type of feathers are soft, fluffy, cover body of nesting birds for insulation?
Down
What enables birds to migrate to the same places year after year?
stars and sun position, topographical landmarks, magnetic cues, air pressure and low frequency sounds
What is the place where gastric fluids begin breaking down food called?
Proventriculus
What type of young have eggs incubated for long periods of time and are active when hatched?
Precocial
What type of feathers are specialized on the wings or tail?
Flight
What is the muscular organ that kneads and crushes food?
Gizzard
What type of young have eggs that hatch quickly-blind, naked, and helpless?
Altricial
What type of feathers give adult birds streamlined shape and provide color and insulation?
Contour
What is the enlargement of the esophagus that stores and moistens food?
Crop
What type of feathers are dust-filtering bristles near nostrils?
Pin