El proceso de urbanización se ha acelerado en el último siglo y se estima que crece en 1.1% cada año, causando que los centros urbanos sean cada vez más comunes. Las áreas verde urbanas son importantes, ya que brindan un lugar donde las especies pueden resguardarse y alimentarse, permitiéndoles adaptarse a los paisajes urbanizados. En la ciudad de San Salvador, un espacio con presencia de árboles y arbustos es el campus de la Universidad de El Salvador. El objetivo de esta investigación fue actualizar el conocimiento de la avifauna que utiliza el área verde como sitio de descanso, alimentación o nidificación. Durante un año (febrero 2017 a enero 2018) realizamos un muestreo mensual, revisamos literatura y colecciones disponibles para elaborar un listado histórico y actualizado de la riqueza de aves del lugar. Registramos 64 especies, de las cuales 14 constituyen nuevos registros para el sitio. Las especies con mayor número de observaciones fueron Brotogeris jugularis, Zenaida asiatica y Quiscalus mexicanus. Con los registros actuales y los datos históricos, la riqueza de aves asciende a 100 especies en la Universidad de El Salvador. Destacamos la presencia de Eupsittula canicularis, Psittacara strenuus y B. jugularis, amenazadas localmente y Amazona auropalliata, en peligro de extinción local e internacional.
We present the observations of some kleptoparasitic and territorial interactions in the Snail Kite (Rostrhamus sociabilis), following focal individuals from January to May 2017 in two wetlands of El Salvador. Th ose interactions were performed during their food searching and managing of prey on perch. We observed two attempts of kleptoparasitism from Great-tailed Grackle (Quiscalus mexicanus) to R. sociabilis. On the fi rst case, a fl ock of Q. mexicanus chased an adult Snail Kite, which had captured a snail; on the second case, a male of Q. mexicanus tried to steal a young Snail Kite's prey, which was managing its prey on perch. On both cases in response to the attack, two individuals chose to change perch to complete the consumption of its prey. We also observed an intent of kleptoparasitism between two male Snail Kites, after the attack, on perch the chased bird released the snail and moved to another site, meanwhile, the attacker ended up eating the snail. We attribute this observation to a kleptoparasitic behavior, related to water stress and variations in prey availability. We recorded Snail Kite's territorial behavior between the species and against other raptors, as a way to protect their feeding territories. With these observations, we provide some information about the ecological behavior of the species in El Salvador. We stress the need to carry out research related to the interaction between R. sociabilis and Q. mexicanus on its feeding sites, focusing in the eff ect of water scarcity and snail availability on the behavior of the Snail Kite.
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