Tp copperhead survey

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Tp copperhead survey

  1. 1. Copperhead Snake Population Survey June 2006 Brazoria County, Texas Photos by Marty Cornell 1
  2. 2. Copperhead Snake Population Survey PARTICIPANTS Marc Ealy Area Manager Nannie M. Stringfellow WMA Texas Parks & Wildlife Department Phil Huxford Member, Texas Master Naturalists Cradle of Texas Chapter Member, Friends of Brazoria Wildlife Refuges 2
  3. 3. Southern Copperhead 3
  4. 4. Collection Area County Road 946, Brazoria, Texas 4
  5. 5. Collection Area County Road 946, Brazoria, Texas 5
  6. 6. Catch from consecutive days, June 2006 6/25 6/26 6/27 6/23 6/24 6
  7. 7. Tools for specimen examination 7
  8. 8. Examining for evidence of past capture 8
  9. 9. Designating Copperhead ID #198 Cloaca Scale 1 Scale 8 Scale 9 9
  10. 10. Notching ID number in scales 10
  11. 11. Coaxing immobilization 11
  12. 12. Gotcha! 12
  13. 13. Measuring length 13
  14. 14. Recording Data 14
  15. 15. Typical Data Snake ID number Capture date Length – Head to Cloaca (inches) Length – Head to Tail Notes (e.g. RC = Recapture) 15
  16. 16. 25 Copperhead Snakes at Release 16
  17. 17. Reference Texas Snakes: A Field Guide (Texas Natural History Guides) James R. Dixon (Author) John E. Werler (Author) Regina Levoy (Illustrator) 17
  18. 18. Range 18
  19. 19. Comparison Study Dixon-Werler Ealy-Huxford Geographic Area Entire Range About 1/4 acre Daily search Two hours/ window All night evening Length of study Several years Four years Observed March- May- activity November September 19
  20. 20. Observations • Length – adult – up to 27” • Length shortly after birth – average 11” • Don’t travel more than 0.5 mile • Think they’re invisible • Move slowly • Strike quickly • Climb palmettos • Rarely climb trees (fall off) 20
  21. 21. Conclusions • Both studies (Dixon-Werler and Ealy- Huxford) produced comparable results. • Copperheads are most active at temperatures 80o and above. 21

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