Laughing Gull (Leucophaeus atricilla) Science Article 1 abstract The subject of the alleged color change in full-grown feathers in certain specific cases, would seem hardly worthy of renewed comment after the thorough papers of Allen and Chapman in the ‘Bulletin’ of the American Museum, Vol. VIII, 1896, pp. 1-44, and of others since then. But […]
Category: Charadriiformes
The Distribution and Conservation Status of the Gull-billed Tern ( Gelochelidon nilotica ) in North America
Gull-billed Tern (Gelochelidon nilotica) Science Article 2 abstract The Gull-billed Tern (Gelochelidon nilotica) has until recently received little conservation and managementattention within North America despite a relatively low overall population size and significant declines inparts of the breeding range. This lack of attention may stem in part from the wide distribution of the species, encompassingparts […]
Fledgling sex ratio variation in colonies of Gull-billed Tern Gelochelidon nilotica
Gull-billed Tern (Gelochelidon nilotica) Science Article 1 abstract Fisher (1930) predicted that natural selectionshould favour equal parental investmentin male and female offspring, and that populationsex ratios at the end of the period ofparental care should be inversely related to thecost of producing individuals of each sex if fitnessreturns from investment in sons and daughtersare similar. […]
Moult, mass and migration of Grey Plovers Pluvialis squatarola wintering in South Africa.
Grey Plover (Pluvialis squatarola) Science Article 2 abstract Data on 355 Grey Plovers Pluvialis squatarola trapped in South Africa in 1971-1997 were used to describe seasonal body mass variation and moult in relation to their very long migrations. The estimated duration of adult primary moult, 131 days, was similar to that observed in India and […]
Origin and movements of Grey Plovers Pluvialis squatarolaringed in Germany
Grey Plover (Pluvialis squatarola) Science Article 3 abstract The general migration routes of waders using the East Atlantic flyway are reasonably wellknown. However, detailed studies on the migration routes and the origin of Grey Ploversstaging along the German coasts are very limited. Klaus-Michael Exo & Svea Wahls, Wader Study Group Bull. 81: 42-45. 1996 Download […]
The regulation of primary molt speed in the grey plover,Pluvialis squatarola
Grey Plover (Pluvialis squatarola) Science Article 1 abstract Grey plovers wintering at different latitudes differ in duration of molt. We investigated the role of simultaneous primaryshedding and different growth rates of individual primaries on regulation of molt speed. We also explored relationships betweenlength and mass of primaries and primary growth rates. Grey plovers adjusted molt […]
Population dynamics, recruitment, individual quality and reproductive strategies in Common Terns Sterna hirundo marked with transponders
Common Tern (Sterna hirundo) Science Article 6 abstract From 1992 to 1999, we used subcutaneously injected transponders, enabling remote and automatic annual identification with the aim of performing an integrated population study of a Common Tern Sterna hirundo colony. Within a few years, population parameters and their inter-year variation could be calculated with a high […]
Population dynamics, recruitment, individual quality an d reproductive strategies in Common Terns Sterna hirundo marked with tran sponders
Common Tern (Sterna hirundo) Science Article 2 abstract From 1992 to 1999, we used subcut aneously injected transponders, enabling remote an d automatic annual identification with the aim of performing an integrated population study of a Common Tern Sterna hirundo colony. Within a few years, population parameters an d their inter-year variation could be calculated […]
Growth and energetics of chicks of the sooty tern (sterna fuscata) and common tern (s. hirundo)
Common Tern (Sterna hirundo) Science Article 7 abstract We measured the energy budgets of chicks of the Common Tern (Sterna hitundo)on Great Gull Island, New York and of the Sooty Tern (S. fuscata) on the Dry Tortugas, Florida. The respiratory energy requirement was determined by measuring oxygen consumption in a closed system. We calculated the […]
Some observations on the occurrence of three generations of primaries in Common Terns Sterna hirundo
Common Tern (Sterna hirundo) Science Article 3 abstract In adult Common Terns Sterna hirundo, the post-nuptial primary moult begins either near the breeding grounds (Cramp 1985) or upon arrival at the wintering grounds (L Underhill pers comm). Moult starts with the innermost primary (p1, numbered descendantly) and all birds initiate moult by October (Cramp 1985, […]