What is a Bird?
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Questions and Answers

How do kestrals use their vision in hunting?

  • By detecting changes in air pressure
  • By sensing vibrations in the ground
  • By detecting UV-reflective chemicals in rodent urine (correct)
  • By using echolocation
  • What is the function of a bird's crop?

  • To grind food like a muscular stomach
  • To store and soften food (correct)
  • To process nitrogenous waste into uric acid
  • To beat rapidly to support wing motion
  • What is the role of a bird's gizzard in digestion?

  • Regurgitating undigested food matter
  • Grinding food like a muscular stomach (correct)
  • Storing food like a crop
  • Excreting uric acid
  • Why do many birds like owls regurgitate undigested food matter as pellets?

    <p>To avoid the weight of unnecessary liquid in the body</p> Signup and view all the answers

    What is unique about how birds excrete uric acid compared to mammals?

    <p>Birds excrete uric acid without having a urinary bladder</p> Signup and view all the answers

    How does a bird's circulatory system differ from that of mammals?

    <p>Birds have a four-chambered heart</p> Signup and view all the answers

    Which system in birds processes nitrogenous waste into uric acid?

    <p>Digestive system</p> Signup and view all the answers

    Why is the heart rate of small birds, like hummingbirds, very fast?

    <p>To support rapid wing motions</p> Signup and view all the answers

    What do ecologists learn about bird niches from studying regurgitated pellets?

    <p>The diet and prey selection of birds</p> Signup and view all the answers

    Why do birds excrete uric acid when it is formed instead of storing it?

    <p>To avoid carrying excess water weight in their bodies</p> Signup and view all the answers

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