There are relatively few places worldwide where migrating raptors can be captured in numbers. Two such places are Cape May Point in southern New Jersey in the United States, in operation for 27 years, and Elat in southern Israel, operated for five years. Migrant raptors were captured, and numbered bands (rings) were placed on their legs. Information about migration pathways, breeding areas, and nonbreeding areas could be inferred from the recovery of these bands in other locations. To get a large enough sample of band recoveries, one must capture and band many raptor migrants. The recovery rates from Cape May Point and Elat are compared. Capture and banding as a method to study raptor migration has the advantage that researchers can get a large sample of raptors that come from a broad area, and, while handling them, can determine their age, sex, and physical condition, as well as obtain photographic documentation and samples of blood, feathers, parasites, and tissues. Records of environmental pollution, such as oil contamination, can also be obtained during handling. Deviations in age distribution and sex ratios of the captured birds in comparison to the general population are assumed to be due mainly to differences in survival and capture rates and migrational pathways.
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Bildstein K.L., Clark W.S., Evans D.L., Field M., Soucy L., Henckel E.Sex and age differences in fall migration of northern harriers J. Field Ornithol 1984 55 145 150
Clark W.S.Migration trapping of hawks (and owls) at Cape May N.J — Third year. EBBA News 1970 33 181 189
Clark W.S.Second record of the Kestrel (Falco tinnunculus) for North America Auk 1974a 91 172
Clark W.S.Occurrence of Swainson's hawk substantiated in New Jersey Wilson Bull 1974b 86 284 285
Clark W.S.Cape May Point raptor banding station—1974 results North Am. Bird Bander 1976 1 5 13
Clark W.S.A modified dho-gaza trap for use at a raptor banding station J. Wildl. Manage 1981 45 1043 1044
Clark W.S.Migration of the Merlin along the coast of New Jersey Raptor Res 1985a 19 85 94
Clark W.S., Methods used to study raptor migration. Conservation studies on Raptors. Proc. World Conf. Birds of Prey, Thessalonika 1982, ICBP Tech. Pub. No. 5, Cambridge Newton I., Chancellor R.1985b
Clark W.S., The migrating Sharp-shinned Hawks of Cape May Point, N.J. Proc. Hawk Conf. IV, Rochester, March 1983, Hawk Migr. Asse, of North Am Harwood M.1986
Clark W.S.The dark morph of the marsh harrier Br. Birds 1987 80 61 72
Clark W.S.The rufous morph of the booted eagle Dutch Birding 1989 11 57 60
Clark W.S., Gorney E.Oil contamination of raptors migrating along the Red Sea Environ. Pollut 1987 46 307 313
Clark W., Duffy K., Gorney E., McGrady M., Schultz C.Raptor ringing at Elat, Israel Sandgrouse 1986 7 21 28
Clark W., Duffy K., Gorney E., McGrady M., Schultz C.Supernumerary primaries and rectrices in some Eurasian and North American raptors J. Raptor Res 1988 22 53 58
Cooper J.E., Gorney E., Ion F., Parasitological and other studies on migrating raptors. Raptor biomedicine Redig P. et al.University of Minnesota Press Minneapolis 1993
Gorney E., Yom-Tov Y.Fat, hydration and moult of Steppe BuzzardsButeo buteo vulpinus on spring migration Ibis 1994 136 185 192
Henny C.J., Clark W.S.Measurements of fall migrant Peregrine Falcons from Texas and New Jersey J. Field Ornith 1982 53 326 332
Kerlinger P.Flight strategies of migrating hawks University of Chicago Press Chicago 1989
Kirkpatrick C.E., Lauer D.M.Hematozoa of raptors from southern New Jersey and adjacent areas J. Wildl. Dis 1985 21 1 6
Kirkpatrick C.E., Trexler-Myren V.P.A survey of free-living falconiform birds for Salmonella J. Am Vet. Med. Assoc 1986 189 997 998
Labinger Z., Gorney E., Parslow R.First record of ShikraAccipiter badius in Israel Sandgrouse 1991 13 46 49
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There are relatively few places worldwide where migrating raptors can be captured in numbers. Two such places are Cape May Point in southern New Jersey in the United States, in operation for 27 years, and Elat in southern Israel, operated for five years. Migrant raptors were captured, and numbered bands (rings) were placed on their legs. Information about migration pathways, breeding areas, and nonbreeding areas could be inferred from the recovery of these bands in other locations. To get a large enough sample of band recoveries, one must capture and band many raptor migrants. The recovery rates from Cape May Point and Elat are compared. Capture and banding as a method to study raptor migration has the advantage that researchers can get a large sample of raptors that come from a broad area, and, while handling them, can determine their age, sex, and physical condition, as well as obtain photographic documentation and samples of blood, feathers, parasites, and tissues. Records of environmental pollution, such as oil contamination, can also be obtained during handling. Deviations in age distribution and sex ratios of the captured birds in comparison to the general population are assumed to be due mainly to differences in survival and capture rates and migrational pathways.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 193 | 32 | 12 |
| Full Text Views | 11 | 0 | 0 |
| PDF Views & Downloads | 14 | 0 | 0 |