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OALib Journal期刊

ISSN: 2333-9721

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La Viudita Enmascarada (Fluvicola nengeta): nueva especie para Paraguay y segundo registro en Argentina
Klavins,Juan; Bodrati,Alejandro;
El hornero , 2007,
Abstract: the masked water-tyrant (fluvicola nengeta) occurred historically in northeastern brazil. in recent decades, its range has expanded to the south and west, reaching the states of southeastern brazil, where it previously did not occur. we present the first record for paraguay and the second record for argentina, which further extend the species' distribution. our observations support the opinion that the species is in expansion, being favoured by human habitat alteration. additionally, we support the use of viudita enmascarada as a common name in argentina and paraguay.
La Torcaza Alas Blancas (Zenaida meloda): una nueva especie para la avifauna argentina
Bodrati,Alejandro; Cockle,Kristina;
El hornero , 2008,
Abstract: the pacific dove (zenaida meloda) has only been reported west of the andes. using tape-recordings and photographs, we report the presence of a population east of the andes, in the province of la rioja, argentina.
Dos nuevos dormilones para la avifauna argentina (Chordeiles acutipennis y Caprimulgus maculicaudus) y comentarios sobre hábitat, comportamiento y geonemia en Paraguay
Bodrati,Alejandro; Areta,Juan Ignacio;
El hornero , 2010,
Abstract: we present records of two caprimulgid species hitherto unreported for argentina: the lesser nighthawk (chordeiles acutipennis), and the spot-tailed nightjar (caprimulgus maculicaudus). the genus caprimulgus would thus be represented by five species in argentina, and the genus chordeiles by three. chordeiles acutipennis was observed (without formal evidence) in the provinces of salta, chaco and formosa, and caprimulgus maculicaudus was observed and tape-recorded in misiones province. we discuss fieldmarks of chordeiles acutipennis. we provide other observations and records of both species in paraguay, where chordeiles acutipennis is considered hypothetical, and also describe the display of caprimulgus maculicaudus in detail.
Comportamiento, identificación y relación con la floración de ca?as del Espiguero Negro (Tiaris fuliginosa) en Misiones, Argentina
Areta,Juan I.; Bodrati,Alejandro;
El hornero , 2008,
Abstract: we report numerous sightings of the sooty grassquit (tiaris fuliginosa) at four localities in the interior atlantic forest of misiones, argentina: parque provincial caá-yarí, puerto iguazú, parque nacional iguazú, and three sites at península andresito. we recorded grassquits feeding on seeds of cola de zorro (setaria sp.), and on two bamboo species: takuarusu (guadua chacoensis) and takuarembo (chusquea ramosissima). we describe the habitats in which our sightings took place, foraging behaviour, vocalizations and some aspects of breeding. we also provide data on plumage and other external features of the sooty grassquit that allow for a safe discrimination from other similar seed-eating birds in the atlantic forest. the patchy geographic distribution pattern of the sooty grassquit, its nomadism, its presence in argentina close to the end of the seeding of takuapi (merostachys claussenii) and in seeding takuarembo stands, and its abundance during the seeding of takuarusu suggest that long term survival of this species might be more dependent upon bamboo seeding than has been previously suspected.
El Maracaná Lomo Rojo (Primolius maracana) en Argentina: ?de plaga a la extinción en 50 a?os?
Bodrati,Alejandro; Cockle,Kristina; Areta,Juan Ignacio; Capuzzi,Gabriel; Fari?a,Rodrigo;
El hornero , 2006,
Abstract: parrots are often considered crop pests; however, they differ from other pest species because they are k strategists (long lifespan, low fecundity). such species are unlikely to recover easily from lethal control, which is often used to reduce their damage to crops. the blue-winged macaw (primolius maracana) is virtually extinct in argentina, and although habitat loss has been cited as the principal cause of its disappearance, this is not a sufficient explanation. based on 779 days of field work, interviews with local farmers, and the biology of the blue-winged macaw, we conclude that one of the fundamental causes of its disappearance from argentina may have been lethal control by farmers.
Tres especies del género Tityra en Argentina
Bodrati,Alejandro; Roesler,Ignacio; Areta,Juan Ignacio; Pagano,Luis G.; Jordan,Emilio A.; Juhant,Matías;
El hornero , 2008,
Abstract: we present the first record of the masked tityra (tityra semifasciata) in argentina. we observed and photographed a male on 17 january 2008 in parque nacional iguazú, misiones. the bird was in the canopy, in a mixed-species flock that included the other two species in the genus, the black-tailed tityra (tityra cayana) and the black-crowned tityra (tityra inquisitor). we describe the main features that diagnose tityra semifasciata semifasciata from the similar tityra cayana braziliensis. the presence of tityra semifasciata in northern misiones province might have been favoured by the ongoing deforestation of the interior atlantic forest, as occurs with other bird species recently added to the avifauna of misiones.
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