Savannah Sparrow (Passerculus sandwichensis) Science Article 3 abstract We compared the incubation behaviour of 1-year-old female Savannah Sparrows Passerculussandwichensis nesting for the first time with that of older females that had nested in previousyears on Kent Island, New Brunswick, Canada. Using temperature probes inserted into 32nests, we determined the length and variability of incubation shifts […]
Category: Emberizidae
Post-mortem digestion of stomach contents in the Savannah Sparrow
Savannah Sparrow (Passerculus sandwichensis) Science Article 7 abstract Van Koersveld (Proc. 10th Intern. Ornith. Congr.: 592-594,1 951) demonstrated that digestion in Corvidae continues for 20 to 30 minutes after death unless stopped in somemanner. He also demonstrated that soft-bodied forms such as earthworms were completely digested within that time and wireworm larvae were nearly gone […]
FIFTY:FIFTY OFFSPRING SEX RATIOS IN SAVANNAH SPARROWS (PASSERCULUS SANDWICHENSIS)
Savannah Sparrow (Passerculus sandwichensis) Science Article 2 abstract Over a 14 year period, we determined offspring sex ratios in a population ofSavannah Sparrows (Passerculus sandwichensis) breeding on Kent Island, an isolated 80 ha islandin the Bay of Fundy, New Brunswick, Canada, based on morphological measurements of318 independent juveniles and 361 returning adults of known parentage. […]
SEXUAL DIMORPiHSM AND POPUIATION SEX RATIOS IN JUVENILE SAVANNAH SPARROWS
Savannah Sparrow (Passerculus sandwichensis) Science Article 8 abstract Savannah Sparrows (Passerculus sandwichensis) breeding on Kent Island, New Brunswick, Canada, are polygynous and sexually dimorphic in size. The sex of 7-d-old nestlingscannot be reliably identified by size alone, but juveniles begin to display clear sexualdimorphism in size by the time they reach independence, several weeks after […]
Ecology and taxonomy of Savannah Sparrow Passerculus sandwichensis in Nuevo Leon, Mexico
Savannah Sparrow (Passerculus sandwichensis) Science Article 5 abstract no abstract Robert A. Behrstock and Ted L. Eubanks, Cotinga 7 (1997): 31-34 Download article download full text (pdf)
GEOGRAPHIC VARIATION IN EASTERN NORTH AMERICAN SAVANNAH SPARROWS
Savannah Sparrow (Passerculus sandwichensis) Science Article 4 abstract In attempting to identify Ohio specimens of the Savannah sparrow, the writer was confronted with the usual difficult problem familiar to investigators in this confusing group of birds. He was not long in discovering what had already been suspected, that more than one geographic race is represented […]
DIFFERENCES IN SINGING BEHAVIOR BETWEEN RUFOUS-COLLARED SPARROWS IN COSTA RICA AND NORTHWESTERN ARGENTINA
Rufous-collared Sparrow (Zonotrichia capensis) Science Article 2 abstract The Rufous-collaredS parrow (Zonotrichia capensisis) one of the most common passerine species in Latin America, ranging from southern Mexico to Tierra de1 Fuego. Although there are studies on the vocal behavior of this species from several locations across SouthAmerica (see King 1974, Nottebohm 1975, Tubaro et al. […]
THE RUFOUS-COLLARED SPARROW AS A HOST OF THE SHINY COWBIRD
Rufous-collared Sparrow (Zonotrichia capensis) Science Article 1 abstract The Rufous-collared Sparrow or Chingolo (Zonotrichia cupensis) is one of the main hosts of the Shiny Cowbird (Molothrus bonariensis) through most of their overlapping range in South America. The most recent study on the interaction between these species was carried out by King (1973) in Horco Molle, […]
Open-habitat birds in recently burned areas: the role of the fire extent and species’ habitat breadth
Rock Bunting (Emberiza cia) Science Article 1 abstract Single burned areas contained 0 to 15 open-habitat species (mean = 7.6), and in all the areas combined there were 22 species, including 17 with an unfavourable conservation status in Europe. The most frequent were Carduelis cannabina, Lullula arborea, Alectoris rufa, Oenanthe hispanica and Emberiza cia, but […]
Migration and wintering of Reed Buntings (Emberiza schoeniclus) in Spain.
Reed Bunting (Emberiza schoeniclus) Science Article 2 abstract The migration and wintering patterns in Spain of Reed Buntings were described from ring-recovery data for 451 birds. Differential migration according to the age and sex of birds was also analyzed, paying special attention to latitudinal differences. Recoveries of Reed Buntings in Spain occur mainly on the […]