Snow Goose (Anser caerulescens) Science Article 2 abstract During a recent population increase, the high-arctic nesting Greater Snow Goose Chen caerulescens atlantica greatly expanded its spring staging habitat. Over two decades, the flock over-spilled from its traditional fresh-water Scripus marshes of the upper St. Lawrence River estuary into the salt-water Spartina marshes of the lower […]
Magnetic orientation of snow buntings (Plectrophenax nivalis), a species breeding in the high Arctic: passage migration through temperate-zone areas
Snow Bunting (Plectrophenax nivalis) Science Article 1 abstract Orientation tests were conducted with snow buntings (Plectrophenax nivalis) exposed to artificially manipulated magnetic fields, during both spring and autumn migration. Experiments were run under clear sunset skies and under simulated complete overcast. The birds closely followed experimental shifts of the magnetic fields during both seasons regardless […]
A new insight into the ageing of Common Snipe Gallinago gallinago-the value of contrast within the wing coverts of adults.
Snipe (Gallinago gallinago) Science Article 1 abstract The ageing criteria for Common Snipe Gallinago gallinago are complex, and a significant proportion of birds in autumn which have completed moult cannot be aged. Jeziorsko Reservoir is an important stopover site for Common Snipe during autumn migration through central Poland. Detailed studies of wing coverts show that […]
Different migration strategies used by two inland wader species during autumn migration, case of Wood Sandpiper Tringa glareola and Common Snipe Gallinago gallinago
Snipe (Gallinago gallinago) Science Article 2 abstract Waders generally follow two alternative strategies.The ‘B-strategy’ or ‘energy minimization’ strategy is to initiate migration late in the season, start moulting at the breeding grounds and migrate slowly in small steps, whereas the ‘S-strategy’ or ‘time minimization’istomigrateimmediatelyaftertheendofthebreedingperiodandmoulton the wintering grounds after a migration with only a few stopover […]
Biometrics, length of stay and body mass increase of migrating Common Snipes Gallinago gallinago in the Gulf of Gdansk
Snipe (Gallinago gallinago) Science Article 3 abstract Between 1983 and 2000, a total of 1774 Common Snipes were caught and measured in the Gulf, of Gdansk at the Polish Baltic Sea coast. The mean measurements obtained in this study werelarger than those provided by other authors. Reasons of this difference are discussed. Among linear measurements […]
Identification of Common Snipe Gallinago gallinago flyways in theWestern Palearctic by analysis of ringing recoveries and genetic studies
Snipe (Gallinago gallinago) Science Article 4 abstract The Common Snipe Gallinago gallinago is a common and widely distributed species in the Western Palearctic. It is mostly migratory in Europe, although those breeding in Ireland, UK and maritime countries of Western Europe are only partially migratory or sedentary(Cramp & Simmons 1983). There are major gaps in […]
Migration pattern of Common Snipe Gallinago gallinago on Dravsko polje,NE Slovenia
Snipe (Gallinago gallinago) Science Article 5 abstract In Europe, wader migration has been studied intensively onthe East Atlantic Flyway (Piersma et al. 1987), especiallythat of particular species (e.g. Gromadzka 1987, Piersma1987, Ens et al. 1990, Ens et al. 1994). Common snipeGallinago gallinago which occur widely at inland sites MILAN VOGRIN, Wader Study Group Bull. 95: […]
MOLLUSK PREDATION BY SNAIL KITES IN COLOMBIA
Snail Kite (Rostrhamus sociabilis) Science Article 4 abstract Snail Kites (Rostrhamus sociabilis sociabilis) observed along the lower Rio Magdalena in northern Colombia fed heavily on Pomacea chemnitzi but also took Marisa cornuarietis, a smaller species. The kites captured Pomacea preferentially over Marisa and had difficulties extracting Marisa from its shell. They also failed to extract […]
Notes on the Snail Kite in Surinam.
Snail Kite (Rostrhamus sociabilis) Science Article 1 abstract The coastal plain of Surinam the Snail Kite (Rostrhamus sociabilis) is the most numerous hawk wherever freshwater marshes occur. The cultivation of rice, which inundates large areas during part of the year, has undoubtedly expanded its feeding grounds. When the rice is growing the birds concentrate along […]
SOME ASPECTS OF THE BREEDING BIOLOGY OF THE SNAIL KITE IN FLORIDA
Snail Kite (Rostrhamus sociabilis) Science Article 3 abstract The breeding biology of the Snail Kite was studied in Florida from 1968-1977 and intermittently from 1978-1980. Breeding occurred every month, but not in the same year. Peak egg-laying occurred from February through April or generally about 81 d before the onset of the rainy season in […]