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Great Horned Owl Diet Geoffrey H. Palmer. Intro to Great Horned Owls.

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Presentation on theme: "Great Horned Owl Diet Geoffrey H. Palmer. Intro to Great Horned Owls."— Presentation transcript:

1 Great Horned Owl Diet Geoffrey H. Palmer

2 Intro to Great Horned Owls

3 Classification

4 Intro to Great Horned Owls Classification Distribution

5 Intro to Great Horned Owls Classification Distribution Morphology

6 Intro to Great Horned Owls Classification Distribution Morphology Behavior & Diet

7 Does diet vary over time?

8 Why would diet vary over time?

9 1.Prey availability & vulnerability

10 Why would diet vary over time? 1.Prey availability & vulnerability 2.Breeding season of owls

11 How can I measure diet variation?

12

13 Field Site

14 Methods 19 Feb 2008 to 05 Apr 2008

15 Results 44 pellets 46 individuals 7 groups of small mammals

16 Dipodomys – Kangaroo rats 3 species 2 individuals

17 Reithrodontomys – Harvest mice 3 species 4 individuals

18 Sigmodon – Cotton rats 4 species 4 individuals

19 Neotoma - Woodrats 1 species 2 individuals

20 Peromyscus – Deer mice 4 species 15 individuals

21 Pocket Mice 5 species 17 individuals

22 VisitsTotals Dipidomys Reithrodotomys Sigmidon Peromyscus Pocket mice Neotoma Unknown Pellets

23 Importance 1.Las Cienegas

24 Management Practices

25 Change in prey species: 1.Availability 2.Vulnerability

26 Importance 1.Las Cienegas 2.Range wide

27 Importance 1.Las Cienegas 2.Range wide 3.Other species

28 Importance 1.Las Cienegas 2.Range wide 3.Other species

29 Importance 1.Las Cienegas 2.Range wide 3.Other species

30 Importance 1.Las Cienegas 2.Range wide 3.Other species

31 Importance 1.Las Cienegas 2.Range wide 3.Other species

32 Importance 1.Las Cienegas 2.Range wide 3.Other species

33 Acknowledgements Dr. JodyLee Duek Jess Gwinn Nate Gwinn David Kahrs Sonja Smith

34 ?Questions?


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