Presencia del Vencejo Montañés Aeronautes montivagus en la Argentina

Presence of the White-tipped Swift (Aeronautes montivagus) in Parque Nacional Calilegua, Jujuy province, becomes fírst record for Argentina

Observaciones sobre nidificación asociada en Charadrius collaris, Sterna superciliaris y Rynchops nigra en el río Uruguay, Entre Ríos, Argentina

The present work is a report of observations realized upon a nesting asociation located over a sand-bank in the Uruguay River, Province of Entre Ríos, Argentina, giving a description of nests; eggs, nestlings and nesting behavior of Charadrius collaris , Sterna superciliaris and Rynchops nigra . Its relative low success in nesting is tentative explained by the fact of being in the last period of the breeding season and also by losses of eggs due to the action of periodical overflow of waters

Registro del Payador Negro Diglossa carbonaria para la Argentina

First record for Argentina of the Carbonated Flower-piercer (Diglossa carbonaria) is reported for neighbourhoods east of La Quiaca, Jujuy province

Registro del Payador Negro <i>Diglossa carbonaria</i> para la Argentina

First record for Argentina of the Carbonated Flower-piercer (<i>Diglossa carbonaria</i>) is reported for neighbourhoods east of La Quiaca, Jujuy province

Distribution and status of the Little Blue Heron (<i>Egretta caerulea</i>) in Argentina

Se analizan todas las citas conocidas para Argentina de la Garza Azul (<i>Egretta caerulea</i>). Se da a conocer la primera mención concreta de su nidificación y 13 nuevas localidades en Argentina, llegando en la actualidad a 30 citas para 28 localidades en 10 provincias. La mayor parte de las localidades corresponde a valles y zonas húmedas del norte y noroeste de Argentina, en donde aparentemente nidifica con cierta regularidad. Los individuos reportados fuera de dicha zona son en su mayoría juveniles y parecen dispersarse a través de ríos importantes como el Pilcomayo, el Bermejo, el Paraná y el Río de la Plata. Existe un proceso de expansión de la Garza Azul en el sur de su distribución en Argentina. Aunque son similares, los juveniles de Garza Azul pueden diferenciarse de los adultos de la Garcita Blanca (<i>Egretta thula</i>) por la forma del pico, el color de la piel desnuda de la cara, del pico, de las patas y de las plumas de las alas.We analyzed all known records from Argentina of the Little Blue Heron (<i>Egretta caerulea</i>). We report the first breeding record and 13 new localities for the species, which is now known from 30 records from 28 localities in 10 provinces. Most records come from valleys and wetlands in northern and northwestern Argentina, where the species apparently breeds regularly. Individuals reported outside this area are mostly juveniles and seems to disperse through rivers such as the Pilcomayo, Bermejo, Paraná and de la Plata. The species is expanding its distribution southward in Argentina. Although similar, juveniles of the Little Blue Heron can be distinguished from adults of the Snowy Egret (<i>Egretta thula</i>) by differences in colour and shape of the bill, and colour of the facial bare skin, legs, and wing feathers