Grey-faced Buzzard (Butastur indicus) Science Article 1 abstract We studied the breeding biology of the Grey-faced Buzzard (Butastur indicus) in Zuojia Nature Reserve, linlin province, China from 1996-98. Grey-faced Buzzards are summer residents in northeastern China. Nesting sites were occupied in March and annual reoccupancy was 60%. Grey-faced Buzzards built new or repaired old nests […]
Category: Eurasia
On the spatial-distribution and social-organization of neck-banded Greylag Geese Anser anser in their breeding area of Lake Neusiedl, Austria
Greylag Goose (Anser anser) Science Article 5 abstract Although goslings are known to move up to 10 km in their first days of life, juvenile geese only moved short distances (up to 1 km) from their ringing sites after ringing. In July the geese gathered in the central Seewinkel area (main gathering place Lange Lacke). […]
Diurnal time-activity budgets in wintering Ferruginous Pochard Aythya nyroca in Tanguar Haor, Bangladesh
Ferruginous Duck (Aythya nyroca) Science Article 1 abstract Diurnal time-activity budgets were quantified for Ferruginous Pochard Aythya nyroca wintering in Tanguar Haor, Bangladesh. Individuals spent most time resting (60%), with less time spent feeding (17%), preening (14%) and swimming (9%). The time spent feeding was generally lower than for other Aythya species in winter, perhaps […]
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, […]
Individual quality and recruitment in the common tern, Sternahirundo
Common Tern (Sterna hirundo) Science Article 4 abstract We investigated the individual histories of more than 1 300 fledglings from an intensively studied colony of commonterns, Sterna hirundo. Based on six cohorts (1992-1998), which had recruited almost completely by 2002, we found that thebody mass of a fledgling was positively related to return and recruitment […]
Colonial and associated with coot (fulica atra) nesting in great crested grebe (podiceps cristatus): comparison of three lakes
Coot (Fulica atra) Science Article 6 abstract Nesting of the Great Crested Grebe in loose colonies and in close association with the Coot was investigated in Lakes Meteliai and Obelija in 1983-?1986 and 1999 and in Lake paltytis in 1984-?1986. Particular lakes and years were considered as integrators of between-lake and between-year differences in breeding […]
Getting rid of the cuckoo Cuculus canorus egg: why do hosts delay rejection?
Cuckoo (Cuculus canorus) Science Article 6 abstract Egg discrimination is well documented in many hosts of avian brood parasites, but the proximate mechanisms of egg recognition and rejection decisions are poorly understood. Relevant in this respect is the observation that rejectors of parasite eggs often delay their response. This delay has implications for understanding mechanisms […]