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Central Wisconsin Kestrel Research

Central Wisconsin Kestrel Research. Janet Eschenbauch Amber Eschenbauch Eric Anderson-Facilitator. Falco sparverius. Holds the Latin meaning “falcon of the sparrows” Often called a sparrow hawk. Frances Hamerstrom. Started this historic nestbox program in 1968.

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Central Wisconsin Kestrel Research

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  1. Central Wisconsin Kestrel Research Janet Eschenbauch Amber Eschenbauch Eric Anderson-Facilitator

  2. Falcosparverius Holds the Latin meaning “falcon of the sparrows” Often called a sparrow hawk

  3. Frances Hamerstrom Started this historic nestbox program in 1968. Monitored nestboxes for 30 years with help from gabboons.

  4. Buena Vista Grasslands • Originally swamp and open marsh, the BVG was ditched and drained for agricultural use • WDNR manages 12,000 acres for preservation of Greater Prairie Chicken

  5. Monitoring May to August 14/58 on Trees 26/58 on Electric Poles 18/58 on Free-standing Poles

  6. Methods & Improvizations

  7. Surprises on the Marsh

  8. Clutches • Between 3-6 Eggs • Lays one egg every other day • Incubates when second to last is laid • Incubates for 28-30 days

  9. Chicks of all Ages

  10. Male Female

  11. Female Adult Plumage Male

  12. Adaptations • Eyespots confuse predators • Eurasian Kestrels locate voles by urine trails which reflect ultraviolet light

  13. Diet • Mice • Small birds • Snakes • Grasshoppers • Dragonflies • Other insects

  14. Capture Methods • Mechanical stuffed owl, Recorded owl call, Dho-gaza Net • Bal-chatri trap • Hand grabbing

  15. Dho-gaza Net • Net drops down to cradle kestrel • No birds have been injured

  16. Banding Sizes

  17. Processing Chicks

  18. Processing Adults

  19. Brood Patch • Males brood about 30% of the time • Some develop brood patch

  20. Education • Nest site fidelity • Natal dispersal • Clutch success rates • Educate public with help from other researchers and volunteers

  21. The Release

  22. Percent of boxes occupied by American Kestrels in central Wisconsin from 2002-2008. Our study has not shown a significant drop.

  23. Clutch size, number hatched, and number of fledglings from successful AMKE nest boxes in central WI.

  24. We would like to thank the WDNR, Greg Dahl, Jim Keir, the Citizen-Based Monitoring Partnership Grant Program, Eric Anderson, Eugene Jacobs, the Aldo Leopold Audubon Society, D. Haessly and all of our volunteers for making this research possible.

  25. Number of young American Kestrels produced per nest attempt from central Wisconsin.

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