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