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?

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 Dipidomys110002 Reithrodotomys301004 Sigmidon210104 Peromyscus5432115 Pocket mice8360017 Neotoma100102 Unknown000022 Pellets1910852 44

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?