Registros de nidificación de Caburé Chico (Glaucidium brasilianum) en parques urbanos de la Ciudad Autónoma de Buenos Aires, Argentina

Abstract


 
 
 El Caburé Chico (Glaucidium brasilianum) es una pequeña ave rapaz de fácil observación en la Ciudad de Buenos Aires. Sin embargo, no hay registros publicados de nidificación en la Ciudad. En el presente trabajo reportamos observaciones sobre cuatro eventos de nidificación de Caburé Chico en dos parques urbanos. Estos eventos reproductivos fueron observados entre 2015-2020. Estos registros sistemáticos responden a un seguimiento de cinco años en ambos espacios verdes, en los cuales se observaron varios ejemplares de caburés. Reportamos, además, la observación de dos eventos de depredación de una especie exótica por esta rapaz nocturna.
 
 

The use of unmanned aerial vehicles for wildlife research

“…Wildlife disturbances due to the use of drones and recommendations to avoid these disturbances It has been shown that drones can cause disturbances to certain species when the necessary measures and precautions are not taken (Borsellino and Rebolo, 2017;Ditmer et al, 2015;Brunton et al, 2019;Rebolo-Ifrán et al, 2019;Schroeder et al, 2020). In marine birds, it has been seen that some species get dispersed when they are close to drones, and that a period of five minutes with a 20 m distance from the individuals is necessary for them to become accustomed to small drones before censuses can be taken (Brisson-Curadeau et al, 2017).…”

Intraguild Predation of an American Kestrel Fledgling by Crested Caracaras in Northern Patagonia, Argentina

“…Also in Argentina but north of Patagonia, Crested Caracaras took a nestling Aplomado Falcon ( F. femoralis ; Salvador 2016), and two nestling Roadside Hawks ( Rupornis magnirostris ; Masson and Gallardo 2017) from their nests, but were also the victims of nest predation by a Long-winged Harrier ( Circus buffoni ) themselves (i.e., eggs; Masson and Gallardo 2017). More relevant to our observations, Crested Caracaras were repeatedly chased and attacked by a breeding pair of American Kestrels (whose nest was about 200 m away from the Crested Caracaras' nest) in an urban park in Buenos Aires (Borsellino 2015).…”

“…To our knowledge, this is the first observation of the successful hunting of a fledgling American Kestrel by a Crested Caracara. Although birds are regular prey of the Crested Caracara in South America (e.g., Hudson 1920, Daguerre 1928, Sazima 2007, Borsellino 2015, de Godoy et al 2020, and elsewhere (e.g., Yosef and Yosef 1992), direct evidence of active hunting of fledglings of another raptor species is not frequently reported. Because most information has been obtained from pellet analysis, the diet of the Crested Caracara in Patagonia has been described as mainly carrion and arthropods (Engh et al 1997, Travaini et al 1 Email address: valeriaojeda@comahue-conicet.gob.ar 2001, Formoso et al 2019, and predatory behaviors are less well known.…”