Corn Crake (Crex crex) Science Article 2 abstract Two methods for ageing Corncrake Crex crex chicks are described. Data on the body weight of chicks of known age, from broods of radio-tagged females, were used to produce a formula for determining the age of chicks of unknown age. This method was, however, prone to error […]

Corn Crake (Crex crex) Science Article 10 abstract The Corncrake is a widespread and common species in Russia. Because agricultural conditionsin Russia are unstable, it is important to establish the Corncrake’s current populationdynamics through studies in pilot areas. Two types of repeated censuses have been carriedout:1. In 1994, there were censuses on pilot plots in […]

Coot (Fulica atra) Science Article 5 abstract The size and composition of the breeding territory of the Coot Fulica atra has been studied in relation to the age of the breeding birds, the age of their neighbours, and the date of arrival in the territory. Old pairs arrive earlier than young pairs. Old pairs have […]

Coot (Fulica atra) Science Article 3 abstract In connection with the building of a Fixed Link (bridge-arti.cial island-tunnel) between Sweden and Denmark intensive studies of waterfowl and benthic fauna and .ora in the Oresund were undertaken as a part of the Environmental Impact Assessment Study. This paper analysis the occurrences of staging and wintering herbivores […]

Common Gallinule (Gallinula chloropus) Science Article 3 abstract The importance of food availability as a constraint upon cooperative behaviour was ex amined by providing supplementary food on some breeding territories of a population of moorhens (Gallinula chloropus). First brood juveniles on territories provided with food were more likely to feed their younger second brood siblings. […]

Common Gallinule (Gallinula chloropus) Science Article 4 abstract Analysing the variation in time along the autumn and winter of the extent of the fat reserves of adult male moorhens. In the period preceding pair formation (February 2003), the relationship was obtained between body size (represented by tarsus length) and an effective index of fat reserves […]

Common Gallinule (Gallinula chloropus) Science Article 2 abstract The purpose of this study was to explain parental aggression to offspring in the moorhen (Gallinula chloropus). Males and females did not feed different subsets of chicks. In addition, there was a positive correlation between feeding rates of each parent to a particular chick and the number […]

Common Gallinule (Gallinula chloropus) Science Article 1 abstract During a two year study of the moorhen, Gallinula chloropus, a quarter of the nests found had two or more females laying in them. This was the result of two features of the moorhens’ breeding biology: (1) Cooperative nesting; two (or more) females were paired to the […]

Clapper Rail (Rallus longirostris) Science Article 1 abstract Little is known of the extent of movement and winter ranges of Clapper Rails (Rallus longirostris) in the United States despite years of study by ornithologists and game biologists (Stewart 1951, 1954;Mangold 1977). For example, only recently was it learned that the endangered southwestern population, R. l. […]

Azure Gallinule (Porphyrio flavirostris) Science Article 1 abstract Specimen records and field observations of the Azure Gallinule (Porphyrulu flavirostris) provide evidence that this species undergoes seasonal movements in portions of its range. Although present year-round in much of Amazonia, it is seasonal in the Guianas, southwestern Amazonia, and Paraguay. Data from single localities within these […]