RACING PIGEONS â IMPACT OF RAPTOR PREDATION

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Nicolaus, L.K., Herrera, J., Nicolaus, J.C. and Dimmick C.R. 1989b. Carbachol as a conditioned taste aversion agent to control avian depredation. Agriculture, Ecosystems and Environment, 26: 13-21. Nicolaus, L.K., Herrera, J., Nicolaus, J.C. and Gustavson, C.R. 1989c. Ethinyl estradiol and generalised aversions to eggs among free ranging predators. Appl. Anim. Behav. Sc., 24: 313-324. Oro, D. & Tella, J.L. 1995. A comparison of two methods for studying the diet of the peregrine falcon. Journal of Raptor Research, 29: 207-210. Parker, A. 1979. Peregrines at a Welsh coastal eyrie. British Birds, 72: 104-114. Pfeiffer, S. & Keil, W. 1963. Abwehr von Greifvogelschaden durch Glaskugeln. Int. Rat. Vogelschutz, Bericht 3: 43-47. Ratcliffe, D.A. 1963. The status of the Peregrine in Great Britain. Bird Study, 56-90. Ratcliffe, D.A. 1965. The Peregrine situation in Great Britain 1963-64. Bird Study, 12: 66-82. Ratcliffe, D.A. 1967. The Peregrine situation in Great Britain 1965-66. Bird Study, 14: 238-246. Ratcliffe, D.A. 1972. The Peregrine population of Great Britain in 1971. Bird Study: 19: 117-156. Ratcliffe, D.A. 1984. The Peregrine breeding population of the United Kingdom in 1981. Bird Study: 31: 1-18. Ratcliffe, D.A. 1993. The Peregrine Falcon (Second Edition). T. & A.D. Poyser. London. Redpath, S.M. & Thirgood, S.J. 1997. Birds of Prey and Red Grouse. H.M. Stationery Office, London. Redpath, S.M. & Thirgood, S.J. 1999. Numerical and functional responses in generalist predators: hen harriers and peregrines on Scottish grouse moors. Journal of Animal Ecology, 68: 879-892. Redpath, S.M., Thirgood, S.J. & Leckie, F.M. 2001. Does supplementary feeding reduce predation of red grouse by hen harriers. Journal of Applied Ecology, 38: 1157-1168. Redpath, S.M., Thirgood, S.J., Leckie, F.M. & Lock, K.A. 1999. Management trial to reduce hen harrier predation on red grouse at Langholm: the effects of providing hen harriers with supplementary food. ITE/GCT draft report to SNH. 98
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RACING PIGEONS - IMPACT OF RAPTOR P
Page 5 and 6:
CONTENTS PAGE 1. EXECUTIVE SUMMARY
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6.3 DETERRENTS USED IN OTHER CIRCUM
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OB=48). Collectively, however, the
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• The risk of sparrowhawk predati
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1.5 REVIEW OF DETERRENTS • A revi
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• Overall reported losses to spar
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2. INTRODUCTION 2.1 BACKGROUND Pere
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During the Second World War (1939-4
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Table 2.1. Changes in the peregrine
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website, 2002). In South Wales, Dix
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2.5.2 Sparrowhawk Diet Sparrowhawk
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In 1996 a total of 34,685 birds fro
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Dixon (2002) also estimated the num
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more likely to follow natural featu
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3. TOTAL REPORTED LOSSES FROM SCOTT
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3.3a). The circumstances of losses
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Figure 3.2. Location of lofts used
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Table 3.3 Regional comparison of ol
Page 42 and 43:
would be expected as a consequence
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p>0.05), although at the Federation
Page 46 and 47:
Ayrshire Loft 25 20 15 10 5 0 1981
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4. REPORTED LOSSES TO SPARROWHAWKS
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Table 4.1. Summary of reported loss
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Table 4.2. Comparison of reported l
Page 54 and 55:
irds, a mean of 0.91 birds per loft
Page 56 and 57: 5. LOSSES TO PEREGRINES AWAY FROM L
Page 58 and 59: Figure 5.1. Regional distribution o
Page 60 and 61: crags were also examined unless it
Page 62 and 63: also died between the time of the r
Page 64 and 65: 5.2.3 Discussion It was always reco
Page 66 and 67: 5.4 ESTIMATE OF POTENTIAL STRAYS 5.
Page 68 and 69: Figure 5.5. Principal race routes f
Page 70 and 71: 5.4.3 Discussion The rate of potent
Page 72 and 73: These 86 questionnaire returns were
Page 74 and 75: Table 6.2. Frequency of multiple lo
Page 76 and 77: within the area of application. The
Page 78 and 79: Table 6.6. Management techniques wh
Page 80 and 81: 1986). Peregrines in Britain, likew
Page 82 and 83: pitched wail and may illuminate at
Page 84 and 85: development to ensure that the chem
Page 86 and 87: deterrents were regularly moved and
Page 88 and 89: located at another loft) and two un
Page 90 and 91: other stimuli. Essentially, the mor
Page 92 and 93: 7. FIELD TRIALS OF RACE DETERRENTS
Page 94 and 95: Table 7.1. Return rates of racing p
Page 96 and 97: 8. CONCLUSIONS AND RECOMMENDATIONS
Page 98 and 99: 9. FUTURE RESEARCH Accurate recordi
Page 100 and 101: Trials of loft-based deterrents The
Page 102 and 103: Conover, M.R. 1979. Response of bir
Page 104 and 105: Inglis, I.R. 1980. Visual bird scar
Page 108 and 109: Toyne, E.P. 1998. Breeding season d
Page 110 and 111: pigeons are available to peregrines
Page 112 and 113: Daily Food Intake (DFI) Redpath & T
Page 114 and 115: Reliability of the available data T
Page 116 and 117: Estimates of potential peregrine ki
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