Bank Swallow (Riparia riparia) Science Article 2 abstract This paper presents an investigation of the sediment used by the Bank Swallow (Sand Martin) Riparia riparia for the construction of breeding tunnels. Grain-size distribution, bulk density and hydraulic conductivity of breeding-tunnel sediment were investigated at four localities in western Sweden. The investigation shows that the Bank […]
Necrophilic behaviour, corpses as nuclei of resting flock formation, and road-kills of Sand Martins Riparia riparia.
Bank Swallow (Riparia riparia) Science Article 3 abstract Many animal populations are affected by road-kills. In this note I report that corpses of road-killed Sand Martins Riparia riparia attracted conspecifics and thereby increased mortality risk. Close to a lake in northern Greece I observed large numbers of Sand Martins, many of which rested on a […]
The Nesting Habits of the Baltimore Oriole.
Baltimore Oriole (Icterus galbula) Science Article 2 abstract Of all our beautiful summer residents the Baltimore Oriole (Zcterus galbula) is the most handsome. This statement applies to both form and coloration. Migration records covering twelve years show that these birds come to southern Iowa on dates ranging from April 26 to May 6, and that […]
RECENT SPECIATION BETWEEN THE BALTIMORE ORIOLE ANDTHE BLACK-BACKED ORIOLE
Baltimore Oriole (Icterus galbula) Science Article 1 abstract A recent phylogenetic survey of the New World orioles (genus Icterus; Omland et al. 1999) suggested that the Baltimore Oriole (I. galbula) and the Black-backed Oriole (I. abeillei) are sister taxa. That survey examined mitochondrial DNA (mtDNA) from a single representative of each species in the genus. […]
WINTERING DISTRIBUTION OF THE BALEARIC SHEARWATER (PUFFINUS YELKOUAN MAURETANICUS, Lowe 1921) OFF THE NORTHEASTERN COAST OF SPAIN
Balearic Shearwater (Puffinus mauretanicus) Science Article 2 abstract The taxonomic status of the Mediterranean Shearwater (Pufimuss yelkouan) is still under discussion (Altaba, 1993; Vittery,1994). The species is already clearly separated on from the Manx Shearwater. Ricard GUTIERREZ and Jordi FIGUEROLA, Ardeola(42)2, 1995 161-166 Download article download full text (pdf)
Modelling demography and extinction risk in the endangered Balearic shearwater
Balearic Shearwater (Puffinus mauretanicus) Science Article 1 abstract Several demographic parameters of Balearic shearwater (Puffinus mauretanicus) were estimated and used to model extinction probabilities for the species, which is an endemic seabird confined to a Mediterranean archipelago. Adult survival was analyzed through capture-recapture models at two colonies free of adult predators during 1997-2002. Extinction probabilities […]
Second record of Baird’s Sandpiper (Calidris bairdii) for Trinidad, with notes on its occurrence in the Caribbean Basin
Bairds Sandpiper (Calidris bairdii) Science Article 1 abstract Baird’s Sandpiper (Calidris bairdii) in juvenal plumage was observed on 17 November 1989 at the Port-of-Spain, Trinidad, wastewater treatment ponds. William L. Murphy, J. Soc. Conserv. Study Carib. Birds) 4(1):3-5 Download article download full text (pdf)
THE NESLING DIET OF THE IBERIAN AZURE-WINGED MAGPIE CYANOPICA CYANUS COOKI IN SOUTHEASTERN PORTUGAL
Azure-winged Magpie (Cyanopica cyanus) Science Article 5 abstract The Azure-winged Magpie Cyanopica cyanus is a small sized corvid, weighing around 70g. This species has a remarkable distribution, occurring only in eastern Asia (China, Korea, Mongolia, Japan and Russia) and in south-western Europe, in the Iberian Peninsula Filipe CANARIO et al, Ardeola 49(2), 2002, 283-286 Download […]
Synchronic east
Azure-winged Magpie (Cyanopica cyanus) Science Article 4 abstract Morphometric and genetic analyses were performed to investigate the relationships between populations of the azure-winged magpie (Cyanopica cyanus). In the morphometric analysis 193 specimens were included representing seven of the nine currently accepted subspecies. Among eight characters analysed, four showed significant differences between samples from Spain and […]
Testosterone and helping behavior in the azure-winged magpie(Cyanopica cyanus): natural covariation and an experimental test
Azure-winged Magpie (Cyanopica cyanus) Science Article 2 abstract In this study, we investigated patterns of natural covariation between testosterone and reproductive status in a cooperatively breeding bird species, the azurewinged magpie (Cyanopica cyanus). To assess the relationship between testosterone and breeding behavior,we also manipulated testosterone (T) levels early in the season (before breeding started) using […]