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Effects of livestock grazing on flocks of seed-eating birds in the central monte desert, Argentina
(National Research Council Canada-NRC Research Press, 2019-03)
Animal populations often decline due to habitat disturbance, but the initial response of organisms to human-induced environmental change is usually behavioral. Intra-and inter-specific interactions can restrict or facilitate ...
Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
(Cooper Ornithological Society, 2011-11)
In some sexually dichromatic passerines, juvenile males retain a plumage similar to that of adult females through their first year or longer (delayed plumage maturation). The Tawny-bellied Seedeater (Sporophila hypoxantha) ...
Plumage variability and taxonomy of the Capped Seedeater Sporophila bouvreuil (Aves: Passeriformes: Emberizidae)
(MAGNOLIA PRESS, 2011)
The species Sporophila bouvreuil comprises four subspecies: S. b. bouvreuil, S. b. pileata, S. b. saturata and S. b. crypta. The males of each subspecies differ in plumage whereas the females and juveniles are very similar ...
First nest description of the Ibera Seedeater ( Sporophila iberaensis)Primera descripcion del nido del capuchino Sporophila iberaensi
(Wilson Ornithological Society, 2019-04)
The southern capuchino seedeaters constitute a rapid radiation of finch-like birds that inhabit Neotropical grasslands in continental South America. While capuchinos are highly sympatric, the mechanisms allowing them to ...
Tiny Bird, Huge Mystery - The Possibly Extinct Hooded Seedeater (Sporophila melanops) Is a Capuchino with a Melanistic Cap
(Public Library of Science, 2016-05-11)
Known with certainty solely from a unique male specimen collected in central Brazil in the first quarter of the 19th century, the Critically Endangered (Possibly Extinct) Hooded Seedeater Sporophila melanops has been one ...
Song-based species discrimination in a rapid Neotropical radiation of grassland seedeaters
(Wiley, 2015-01)
Acoustic signals among newly diverged taxa have the potential to convey species identity, information that is key to reducing hybridization. Capuchino seedeaters constitute a remarkable example of recently radiated endemic ...
Grazing impact on desert plants and soil seed banks: implications for seed-eating animals
(Gauthier-Villars/Editions Elsevier, 2014-05)
We assess whether the knowledge of livestock diet helps to link grazing effects with changes in plant cover and soil seed bank size, aiming at inferring the consequences of grazing on seed-eating animals. Specifically, we ...
Breeding biology and conservation of the Marsh Seedeater Sporophila palustris
(Cambridge University Press, 2013-06)
El Capuchino Pecho Blanco Sporophila palustris es uno de los capuchinos menos conocidos y uno de los más amenazados. Sus poblaciones reproductivas son locales, fragmentadas y ocurren en el nordeste de Argentina, sudeste ...