Swainsons Thrush (Catharus ustulatus) Science Article 4 abstract Part of the documentation for an ‘out-of-season’ bird may be its being banded by a reputable bander. Since banding data often contribute to patterns of change in bird distribution, it might be advantageous to leave unverified records in the Bird Banding Laboratory’s database with a code indicating […]
Category: Turdidae
Hurricane-Related Vagrancy of Swainson’s Thrush and Veery in Puerto Rico
Swainsons Thrush (Catharus ustulatus) Science Article 5 abstract Low pressure waves that contributed to the formation of Hurricane Wilma in the westernCaribbean produced westerly winds in the central Caribbean and Puerto Rico during the second week of October, 2005. On October 12 and for the following two weeks Swainson’s Thrush (Catharus ustulatus, six locations) and […]
THE IMPORTANCE OF FRUIT TO SWAINSON’S THRUSHES, CATHARUS USTULATUS, DURING FALL MIGRATION: A FIELD TEST OF PLASMA METABOLITE ANALYSIS
Swainsons Thrush (Catharus ustulatus) Science Article 2 abstract I evaluated the hypothesis that fruit availability significantly influences stopoverhabitat quality for fall migrating Swainson’s Thrushes (Catharus ustulatus) in coastalnorthern California. I analyzed plasma metabolites (triglycerides,
THE IMPORTANCE OF PRODUCTIVITY TO THE DYNAMICS OF A SWAINSON’S THRUSH POPULATION
Swainsons Thrush (Catharus ustulatus) Science Article 3 abstract We analyzed the population dynamics of Swainson’s Thrushes (Catharus ustulutus) breeding at the Palomarin Field Station of the Point Reyes Bird Observatory using 15 yearsbreeding at the Palomarin Field Station of the Point Reyes Bird Observatory using 15 years (1980-1994) of long-term, standardized mist-net data. The capture […]
Demographic mechanisms of the population decline of the song thrush Turdus philomelos in Britain
Song Thrush (Turdus philomelos) Science Article 3 abstract In Britain, the song thrush Turdus philomelos is categorized as a species of high national conservation concern because of a large population decline during the last three decades. We calculated a series of annual national population estimates for woodland and farmland habitats combined for the period 1964-2000. […]
Blue eggs do not reduce nest predation in the song thrush,Turdus philomelos
Song Thrush (Turdus philomelos) Science Article 2 abstract Many passerine birds with open cup-shaped nests lay blue or blue-green eggs. In thrushes, blue eggs may be cryptic and provide camouflage by imitating spots of light on green leaves. Alternatively, egg coloration may be selectively neutral because nest predators detect nests and not eggs, or it […]
Post-breeding dispersal, breeding site fidelity and migration/wintering areas of migratory populations of Song Thrush Turdus philomelos in the Western Palearctic
Song Thrush (Turdus philomelos) Science Article 1 abstract Song Thrush Turdus philomelos ring recovery data gathered over 90 years in central, north and east Europe were analysed in their breeding zones and in 14 migration/wintering areas in Europe, North Africa and the Near East. Few post-breeding movements were over 20 km before the end of […]
REPORT ON A SURVEY OF RING OUZEL Turdus torquatus torquatus TERRITORIES IN ROSEDALE AND OTHER AREAS OF THE NORTH YORK MOORS IN 2008
Ring Ouzel (Turdus torquatus) Science Article 2 abstract The 2008 survey was the ninth year in which a detailed study had been made of the ring ouzel Turdus torquatus torquatus (RZ) population in the North York Moors National Park and continued the work started in 1999 (foot & mouth preventing work in 2001). The findings […]
The decline of the Ring Ouzel Turdus torquatus in Britain: evidence from bird observatory data
Ring Ouzel (Turdus torquatus) Science Article 1 abstract Analysis of British and Irish bird observatory data from 1970-1998 shows that the number of Ring Ouzel Turdus torquatus bird days has declined significantly in spring at western observatories through which British-breeding birds pass, but not at east coast observatories through which Fennoscandian breeders pass. The extent […]
Some factors affecting foraging and habitat of Ring OuzelsTurdus torquatus wintering in the Atlas Mountains of Morocco
Ring Ouzel (Turdus torquatus) Science Article 3 abstract This study aimed to shed light on the role of juniper berries as the principal foodsource for Ring Ouzels Turdus torquatus wintering in Morocco’s Atlas Mountains. Of the twojuniper species surveyed, Prickly Juniper Juniperus oxycedrus was the most widespread, butoccurred at low densities in other types of […]