great horned owl diet
DESCRIPTION
Great Horned Owl Diet. Geoffrey H. Palmer. Intro to Great Horned Owls. Intro to Great Horned Owls. Classification. Intro to Great Horned Owls. Classification Distribution. Intro to Great Horned Owls. Classification Distribution Morphology. Intro to Great Horned Owls. Classification - PowerPoint PPT PresentationTRANSCRIPT
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Great Horned Owl Diet
Geoffrey H. Palmer
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Intro to Great Horned Owls
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Intro to Great Horned Owls
• Classification
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Intro to Great Horned Owls
• Classification• Distribution
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Intro to Great Horned Owls
• Classification• Distribution• Morphology
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Intro to Great Horned Owls
• Classification• Distribution• Morphology• Behavior & Diet
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Does diet vary over time?
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Why would diet vary over time?
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Why would diet vary over time?
1. Prey availability & vulnerability
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Why would diet vary over time?
1. Prey availability & vulnerability
2. Breeding season of owls
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How can I measure diet variation?
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How can I measure diet variation?
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Field Site
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Methods
19 Feb 2008 to 05 Apr 2008
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Results
• 44 pellets
• 46 individuals
• 7 groups of small mammals
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Dipodomys – Kangaroo rats
• 3 species
• 2 individuals
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Reithrodontomys – Harvest mice
• 3 species
• 4 individuals
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Sigmodon – Cotton rats
• 4 species
• 4 individuals
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Neotoma - Woodrats
• 1 species
• 2 individuals
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Peromyscus – Deer mice
• 4 species
• 15 individuals
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Pocket Mice
• 5 species
• 17 individuals
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Visits Totals
Dipidomys 1 1 0 0 0 2
Reithrodotomys 3 0 1 0 0 4
Sigmidon 2 1 0 1 0 4
Peromyscus 5 4 3 2 1 15
Pocket mice 8 3 6 0 0 17
Neotoma 1 0 0 1 0 2
Unknown 0 0 0 0 2 2
Pellets 19 10 8 5 2 44
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Importance
1. Las Cienegas
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Management Practices
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Management Practices
Change in prey species:
1. Availability
2. Vulnerability
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Importance
1. Las Cienegas
2. Range wide
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Importance
1. Las Cienegas
2. Range wide
3. Other species
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Importance
1. Las Cienegas
2. Range wide
3. Other species
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Importance
1. Las Cienegas
2. Range wide
3. Other species
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Importance
1. Las Cienegas
2. Range wide
3. Other species
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Importance
1. Las Cienegas
2. Range wide
3. Other species
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Importance
1. Las Cienegas
2. Range wide
3. Other species
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Acknowledgements
Dr. JodyLee Duek
Jess Gwinn
Nate Gwinn
David Kahrs
Sonja Smith
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?Questions?