In Argentina, 40 species of diurnal raptors, 20 species of nocturnal raptors and five scavengers are present, but very little is known about their biology and ecology due to their low population abundance and the difficulties associated with their study (Trejo et al. 2007). Previous studies reporting body masses of birds in the region include Belton (1984) and Dunning-Jr. (1992, 2008). However, in general, biometric data of raptors in Argentina is scarce (Trejo 2007). These measurements can be useful for a variety of topics such as conservation, ecology, biology, taxonomy and phylogenetic studies. Few studies on austral raptors present morphometric data, and these are mostly based on specimens housed in collections, instead of live birds. Therefore, certain measurements such as body mass or total body length are nonexistent or inaccurate (Jiménez 1995). Here, we present information on body measurements and body mass of 20 species of scavengers and raptors belonging to the families Cathartidae, Accipitridae and Falconidae.
Morfometría y masa corporal de Strigiformes (Aves) de Argentinaä Resumen -Presentamos datos de 113 ejemplares vivos de 11 taxones diferentes de rapaces nocturnas de Argentina. La información fue obtenida mediante las campañas de anillado del Centro Nacional de Anillado de Aves (CENAA) y del Centro de Rehabilitación de Aves Rapaces (CeRAR) ambos pertenecientes a la Universidad Nacional de Tucumán, Argentina. Utilizamos redes de niebla durante la noche para capturar las lechuzas durante dichas campañas. En el campo tomamos medidas de longitud total, pico (culmen sin cera y culmen con cera), cuerda alar y masa corporal de cada ave. El objetivo del trabajo fue obtener información biométrica de ejemplares vivos de lechuzas que podrá ser utilizada posteriormente en estudios ecológicos, taxonómicos y de filogenia.Palabras claves: Tytonidae, Strigidae, lechuzas, biometría.ä Abstract -We present data of 113 live specimens of 11 different taxa of night raptors from Argentina. The information was obtained through ringing campaigns of the Centro Nacional de Anillado de Aves (CENAA) and the Centro de Rehabilitación de Aves Rapaces (CeRaR), both belonging to the National University of Tucumán, Argentina. We used mist nests during the night to capture the owls during such campaigns. In the field, we took measures of total length, bill (culmen with wax and culmen without wax), wing chord, and body mass of each bird. The objective of the work was to obtain biometric information of live owl specimens that can be used later in ecological, taxonomic and phylogenetic studies.
El Arañero Corona Rojiza (Myioborus brunniceps) se distribuye en bosques andinos de Bolivia y Argentina; nidifica en el bosque montano y desciende a invernar en zonas pedemontanas y chaqueñas. En este trabajo se describen nidos, huevos y juveniles observados en Tucumán, Catamarca y Jujuy. Las observaciones son comparadas con descripciones previas, encontrándose diferencias importantes en la forma del nido.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.