RESUMEN. En este trabajo se presentan nuevos aportes y se recopila la información existente, acerca de la nidificación de aves de presa diurnas (Falconiformes) en estructuras humanas en la Argentina. Al presente, son catorce especies las... more
RESUMEN. En este trabajo se presentan nuevos aportes y se recopila la información existente, acerca de la nidificación de aves de presa diurnas (Falconiformes) en estructuras humanas en la Argentina. Al presente, son catorce especies las que utilizan sustratos artificiales en el mencionado país. Diez emplean postes de tendido eléctrico. Halcones Peregrinos (Falco peregrinus), Jotes Cabeza Negra (Coragyps atratus), Milanos Blancos (Elanus leucurus) y Águilas Coronadas (Buteogallus coronatus) no han sido descriptas nidificando en tendidos eléctricos pero si en otro tipo de construcciones. Caranchos (Caracara plancus), Chimangos (Milvago chimango) y Halconcitos Colorados (Falco sparverius) serían las únicas especies que además de postes de electricidad emplean otros sustratos. El conocimiento, aún muy limitado en Sudamérica, acerca de las estructuras construi-das por humanos utilizadas por las distintas especies para nidificar, se considera relevante para el manejo y conservación de las mimas. ABSTRACT. RAPTORS THAT NEST ON MAN-MADE STRUCTURES IN ARGENTINA. NEW RECORDS AND A REVIEW. In this paper we compile information (a review and new data) about the nesting of diurnal birds or prey (Falconiformes) on man-made structures in Argentina. At present, fourteen species use artificial substrates. Ten species use electricity pylons. Peregrine Falcons (Falco peregrinus), Black Vultures (Coragyps atratus), White-Tailed Kites (Elanus leu-curus) and Crowned Eagles (Buteogallus coronatus) have been described nesting on artificial substrates but not on electricity power lines. South American Caracaras (Caracara plancus), Chimango Caracaras (Milvago chimango) and American Kestrels (Falco sparverius) seem to be the only species capable of nesting on pylons and on other types of human made structures. The knowledge, by the way very limited in South America, about the artificial manmade structures used by the different species/ populations of birds of prey is considered an essential tool for their management and conservation.
Cenizo, M.M., Tambussi, C.P. & Montalvo, C.I., iFirst Article. Late Miocene continental birds from the Cerro Azul Formation in the Pampean region (central-southern Argentina). Alcheringa, 1–22. ISSN 0311-5518.The oldest known birds from... more
Cenizo, M.M., Tambussi, C.P. & Montalvo, C.I., iFirst Article. Late Miocene continental birds from the Cerro Azul Formation in the Pampean region (central-southern Argentina). Alcheringa, 1–22. ISSN 0311-5518.The oldest known birds from the Cerro Azul Formation are described, including the oldest records for the genera Eudromia and Nothura (Tinamidae), Milvago (Falconidae), Pterocnemia (Rheidae) and an undetermined Tyrannidae. The first remains of Phorusrhacidae for this formation are reported and a specimen previously referred to the giant teratorn Argentavis magnificens is reassigned to this family. We outline and update the current knowledge of the groups studied herein. The palaeornithological record from the Cerro Azul Formation is congruent with palaeoenvironmental inferences previously drawn from mammalian assemblages recovered from this unit, which point to the existence of open environments, possibly xerophyllous shrubby steppes, perhaps with some trees. These records are the first indications of a typically Pampean bird fauna at the end of the late Miocene in central-southern Argentina.
Eight species of falcons (Falconidae) have been recorded in Chile. To date, all relevant studies considered birds of prey in general, with no specific focus on this family. Based on a comprehensive review of the literature , an updated... more
Eight species of falcons (Falconidae) have been recorded in Chile. To date, all relevant studies considered birds of prey in general, with no specific focus on this family. Based on a comprehensive review of the literature , an updated report is presented on the state of knowledge of falcons in Chile. This data set comprises a total of 165 studies published from 1915 to 2015. Scientific productivity was lowest in 1945-1955 and highest in 2005-2015, with a steady increase since 1985. However, the focus of research in Chile is biased towards two species: Milvago chimango and Falco sparverius. Two administrative regions, Santiago Metropolitan Region and Araucanía, were the most studied whereas Arica, Tarapacá, and Antofagasta regions accounted for fewer than 1% of the studies. Faunistic studies (including abundance) were the most common research topic. It is suggested that the lack of knowledge regarding species in the genus Phalcoboenus may negatively affect the conservation status of these species, and believed that the lack of preference for certain research topics, such as systematics and natural history, are the result of historical factors including the decrease of field biology and perhaps a biased interest of the researchers. Finally, this review highlights the paucity of information on falcons and provides a framework for directing future research.
Lesser Kestrel, Falco naumanni, in Verona province (Veneto, Italy): new sightings and preliminary data (Falconiformes: Falconidae). Until 2011, the Lesser Kestrel was regarded as a rare species in the Verona province, but new data suggest... more
Lesser Kestrel, Falco naumanni, in Verona province (Veneto, Italy): new sightings and preliminary data (Falconiformes: Falconidae). Until 2011, the Lesser Kestrel was regarded as a rare species in the Verona province, but new data suggest that this small falcon may be considered a regular migrant, especially during the post-breeding period.
SPECIES RICHNESS AND COMPOSITION OF RAPTORS (FALCONIFORMES AND STRIGIFORMES) OF BUENOS AIRES CITY, ARGENTINA.— We carried out field surveys in order to estimate species richness and composition of the raptor community in Buenos Aires... more
SPECIES RICHNESS AND COMPOSITION OF RAPTORS (FALCONIFORMES AND STRIGIFORMES) OF BUENOS AIRES CITY, ARGENTINA.— We carried out field surveys in order to estimate species richness and composition of the raptor community in Buenos Aires City. We recorded 21 species, most of them belonging to Accipitridae, followed by Strigidae and Falconidae. All of the species were observed using green spaces, indicating a general affinity for natural or semi-natural environments. Some species were also observed using built-up areas and densely built-up areas. Falconidae was the group more tolerant to urbanization. Falco sparverius and Glaucidium brasilianum, which nest in tree hollows and fed on small preys, were frequent in the city and can be considered successful urban species.
