RACING PIGEONS â IMPACT OF RAPTOR PREDATION

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Figure 5.5. Principal race routes for Scottish racing pigeons. 60
5.4.2 Results method 1: A total of 58.4% of the Scottish racing pigeons assessed were potential strays, with no difference between old and young birds (Table 5.6). For both old and young birds, 55.6% were off-line and 2.8% had overshot their home loft. Table 5.6 Estimation of the rate of potential straying by deviation from direct line of flight between release point and loft (method 1). No. % YOUNG BIRDS (n=36) Off-line 20 55.6 Overshot 1 2.8 On-line 15 OLD BIRDS (n=72) Off-line 40 55.6 Overshot 2 2.8 On-line 30 ALL BIRDS (n=108) Off-line 60 55.6 Overshot 3 2.8 On-line 45 method 2: Estimates of the percentage of Scottish racing pigeons killed by peregrines which were potential spatial strays ranged from 44% to 61% for young birds, from 31% to 54% for old birds, and 38% to 57% collectively (Table 5.7). Table 5.7. Estimation of the rate of potential straying using three categories for the distance between the race route and the eyrie in which rings were recovered (method 2). Potential Stray Distance Definition >20km >30km >50km No. % No. % No. % YOUNG BIRDS (n=36) Off-line 21 58.3 19 52.8 16 44.4 Overshot 1 2.7 0 0 0 0 On-line 14 17 20 OLD BIRDS (n=72) Off-line 35 48.6 26 36.1 22 30.6 Overshot 4 5.6 3 4.2 3 4.2 On-line 33 43 47 ALL BIRDS (n=108) Off-line 46 51.9 45 41.7 38 35.2 Overshot 5 4.6 3 2.8 3 2.8 On-line 47 60 67 61
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RACING PIGEONS - IMPACT OF RAPTOR P
Page 5 and 6:
CONTENTS PAGE 1. EXECUTIVE SUMMARY
Page 7:
6.3 DETERRENTS USED IN OTHER CIRCUM
Page 10 and 11:
OB=48). Collectively, however, the
Page 12 and 13:
• The risk of sparrowhawk predati
Page 14 and 15:
1.5 REVIEW OF DETERRENTS • A revi
Page 16 and 17:
• Overall reported losses to spar
Page 18 and 19: 2. INTRODUCTION 2.1 BACKGROUND Pere
Page 20 and 21: During the Second World War (1939-4
Page 22 and 23: Table 2.1. Changes in the peregrine
Page 24 and 25: website, 2002). In South Wales, Dix
Page 26 and 27: 2.5.2 Sparrowhawk Diet Sparrowhawk
Page 28 and 29: In 1996 a total of 34,685 birds fro
Page 30 and 31: Dixon (2002) also estimated the num
Page 32 and 33: more likely to follow natural featu
Page 34 and 35: 3. TOTAL REPORTED LOSSES FROM SCOTT
Page 36 and 37: 3.3a). The circumstances of losses
Page 38 and 39: Figure 3.2. Location of lofts used
Page 40 and 41: Table 3.3 Regional comparison of ol
Page 42 and 43: would be expected as a consequence
Page 44 and 45: p>0.05), although at the Federation
Page 46 and 47: Ayrshire Loft 25 20 15 10 5 0 1981
Page 48 and 49: 4. REPORTED LOSSES TO SPARROWHAWKS
Page 50 and 51: Table 4.1. Summary of reported loss
Page 52 and 53: 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 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 106 and 107: Nicolaus, L.K., Herrera, J., Nicola
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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RACING PIGEONS â IMPACT OF RAPTOR PREDATION