Whistling Swan (Cygnus columbianus) Science Article 2 abstract Large migratory birds may bring along stores in order to survive adverse conditions and produce a clutch upon arrival (
Category: Eurasia
Conservation measures based on migration research in whitestorks (Ciconia ciconia, Ciconia boyciana)
White Stork (Ciconia ciconia) Science Article 6 abstract For over a decade, we have been using satellite tracking to study the migration of white storks (Ciconia ciconia) alongtheir eastern migration route from Europe to southern Africa. About 120 individuals have been monitored by satellite-trackingto determine the route of the journey, choice of staging areas and […]
The effect of predation by Marsh Harriers Circus aeruginosus on the survival of ducklings and game bird chicks.
Western Marsh Harrier (Circus aeruginosus) Science Article 4 abstract The level of predation by a pair of Marsh Harriers Circus aeruginosus on ducklings and gamebird chicks was calculated from observations of hunting ranges, feeding rates and diet, and estimates of the availability of prey during the breeding season. The harriers took 22% of the Pheasant […]
Orphean Warbler, species report Spain
Western Orphean Warbler (Sylvia hortensis) Science Article 1 abstract Orphean Warbler, species report Spain Javier Blasco-Zumeta, Laboratorio Virtual Ibercaja Download article download full text (pdf)
Nest-site selection by Marsh Harrier (Circus aeruginosus) in the shore belt of Helophytes on large lakes
Western Marsh Harrier (Circus aeruginosus) Science Article 2 abstract Nest-site selection by Marsh Harrier (Circus aeruginosus) was investigated on Lakes Meteliaiand Obelija in 1983n1986 and Lake fialtytis in 1984n1986 in southern Lithuania. Fifty five breedingpairs were detected and 49 nests (89.1%) were found. With regard to the potential breeding habitat,Lakes Meteliai and fialtytis represented extreme […]
Provisioning behaviour in relation to food availability and nestling food demand in the Water Pipit Anthus spinoletta
Water Pipit (Anthus spinoletta) Science Article 3 abstract Insufficient food provisioning by parents can reduce growth rate of altricial nestlings, their size and weight at fledging, and also affect survival. Therefore at low food availability, parents should increase their food provisioning effort. In insectivorous Water Pipits Anthus spinoletta prey biomass differed up to 50 times […]
Breeding of the Water Rail Rallus aquaticus in Cladium mariscusvegetation
Water Rail (Rallus aquaticus) Science Article 1 abstract We have studied breeding habitats of the Water Rail Rallus aquaticus in Cladium mariscus (Galingale) vegetation at Botshol (Abcoude, 51 deg 52’N;5 deg 04’E) in The Netherlands and on Oland in Sweden. Water Rails were localised by day by provoking vocal responses with a cassette recorder, using […]
Why is the Water Rail Rallus aquaticus a very scarce breedernorth of 61 deg N?
Water Rail (Rallus aquaticus) Science Article 2 abstract Along a transect from just north of Uppsala (c. 60 deg ?N) to Lulea (c. 65 deg 30′ N), the eastern coast of Sweden, we searched for Water Rails Rallus aquaticus. Rails were found at four of twenty-four visited sites, the northernmost site at 61 deg 08′ […]
New material supplies in the Marsh Harrier Circus aeruginosus sexual roles daily and seasonal activity patterns and rainfall influence
Western Marsh Harrier (Circus aeruginosus) Science Article 5 abstract Nest maintenance is an important part of parental care for the Marsh Harrier Circus aeruginosus throughout the entire breeding period. Nest material supply trips are mainly carried out by the female as the male only contributes during incubation and the early nestling period. The trips rate […]
Main migratory direction of Marsh HarrierCircus aeruginosus: an analysis of recovery data ofspecimens ringed in Latvia from 1925 to 2004
Western Marsh Harrier (Circus aeruginosus) Science Article 1 abstract Th is paper describes the main migratory directions of the Latvian Marsh Harrier Circus aeruginosuspopulation and provides an overview of recovery data. Th e study was based on analysis of recoverydata of Marsh Harrier that were ringed in Latvia from 1925 to 2004 and subsequently recovered.In […]