Aquatic Warbler (Acrocephalus paludicola) Science Article 1 abstract As a globally threatened species, the Aquatic Warbler requires a monitoring programme forpopulation trends to be tracked. Such a programme should consider the timing of censuses toachieve precise assessments of the number of the singing males within the limited singing period.We compare results of whole-population counts conducted […]
Category: Passeriformes
The African migration and winteringgrounds of the Aquatic WarblerAcrocephalus paludicola
Aquatic Warbler (Acrocephalus paludicola) Science Article 2 abstract There is a clear need for protection of the migration and wintering grounds of the GloballyThreatened Aquatic Warbler Acrocephalus paludicola, but little is known about them andthe threats they face. To narrow this gap, a desk study was performed between May 1998 andOctober 2004. Information on known […]
Using stable isotopes to investigate migratory connectivityof the globally threatened aquatic warbler Acrocephaluspaludicola
Aquatic Warbler (Acrocephalus paludicola) Science Article 14 abstract Understanding the links between breeding andwintering areas of migratory species has importantecological and conservation implications. Recently, stableisotope technology has been used to further our understanding. Deborah J. Pain et al, Oecologia (2004) 138: 168-174 Download article download full text (pdf)
SEASONAL STATUS OF THE AMERICAN PIPIT IN IDAHO
American Pipit (Anthus rubescens) Science Article 2 abstract In Idaho, the American Pipit (Anthus rubescens) has been considered primarily a migrant, either locally common but erratic (Larrison et al. 1967) or uncommon in spring and common in fall (Burleigh 1972). Several other writers considered it an abundant fall migrant but gave no indication of actual […]
Hatchability of American Pipit eggs in the Beartooth Mountains, Wyoming
American Pipit (Anthus rubescens) Science Article 1 abstract Hatchability often is reported as the proportion of eggs laid that hatch. While this may be the demographic value of ultimate interest as an index of recruitment, such broad usage makes it difficult or impossible to identify more specific proximate factors affecting hatching and the extent that […]
ACORN WOODPECKER PREDATION ON CLIFF SWALLOW NESTS
American Cliff Swallow (Petrochelidon pyrrhonota) Science Article 2 abstract Unlike many other woodpeckers that feed on woodboringinsects and larvae, Acorn Woodpeckers (MeIanerpes formicivorus) feed primarily on acorns, insects caught by flycatching, and sap (Bent 1939, MacRoberts 1970, MacRoberts and MacRoberts 1976). They also supplement their diets with an occasional small lizard (Koenig, pers. comm.), fruit, […]
The life history and ecology of the cliff swallow bug, Oeciacus vicarius (Hemiptera: Cimicidae)
American Cliff Swallow (Petrochelidon pyrrhonota) Science Article 4 abstract The life history of the Ciff swallow bug Oeciacus vicarius is closely associated with that of the cliff swallow Hirundo pyrrhonota during the bird’s three month breeding period in the Nearctic region. The bugs are long lived, feed rapidly and lay eggs in several clutches that […]
AN ALTITUDINAL CLINE IN CONDUCTANCE OF CLIFF SWALLOW (PETROCHELIDON PYRRHONOTA) EGGS TO WATER VAPOR
American Cliff Swallow (Petrochelidon pyrrhonota) Science Article 1 abstract The rate of diffusion of water molecules through air is inversely related to atmospheric pressure; diffusivity of water vapor, therefore, is greater at high altitudes than at lowelevations. Assuming that conservation of water in avian eggs is essential for normal development and hatching of embryos, we […]
NESTLING MORTALITY IN SWALLOWS DUE TO INCLEMENT WEATHER
American Cliff Swallow (Petrochelidon pyrrhonota) Science Article 6 abstract For two consecutive years 24 hours or more of continuous precipitationduring early June resulted in mortality in nestlingT ree Swallows{ Iridoprocnebicolor} and Cliff Swallows {Petrochelidonp yrrhonota} in Marin County,California. There have been few reports of swallow nestling mortality caused byinclement weather in North America. Chapman (1955) […]
Deterring cliff-swallow nesting on highway structures using bioacoustics and surface modifications
American Cliff Swallow (Petrochelidon pyrrhonota) Science Article 3 abstract Cliff swallows (Petrochelidon pyrrhonota) are migratory birds that breed in coloniesand frequently nest on highway structures. Protected by the Migratory Bird Treaty Act of1918, swallows in their active nests cannot be harmed by nesting-control methods. Thiscauses problems and delays in maintenance of structures by divisions of […]