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Owl Pellets - PowerPoint PPT Presentation


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Owl Pellets. Owls. 19 species in North America Predatory birds. Predator Adaptations. Avoiding detection Cryptic coloration Finding prey Vision Auditory Capturing prey. Cryptic Coloration. Western Screech Owl. Long Eared Owl. Great Horned Owl. Silent Flight.

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Presentation Transcript
slide2
Owls
  • 19 species in North America
  • Predatory birds
predator adaptations
Predator Adaptations
  • Avoiding detection
    • Cryptic coloration
  • Finding prey
    • Vision
    • Auditory
  • Capturing prey
owl digestive system
Owl Digestive System
  • No crop
    • Food storage
  • Proventriculous
    • Digestive enzymes & acids
    • Less acidic than other birds of prey
  • Ventriculous aka gizzard
    • Filters bones, fur, teeth
owl pellet
Owl Pellet
  • Created in gizzard
  • Stored in proventriculous
  • Up to 10-12 hours
  • Regurgitated
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http://www.youtube.com/watch?v=WACVNqi71NA&feature=related