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Article
Ignacio Roesler, Auteur ; Santiago Imberti, Auteur ; Hernan Casanas, Auteur ; Bettina Mahler, Auteur ; Juan Carlos Reboreda, AuteurWe estimated the present population size of the Hooded Grebe Podiceps gallardoi and compared it with the population in 1985. During the breeding seasons 2009/2010 and 2010/2011 we monitored 251 lakes on the main plateaus of Santa Cruz province, [...]
Article
Adrian S. Di Giacomo, Auteur ; Peter D. Vickery, Auteur ; Hernan Casanas, Auteur ; Oscar A. Spitznagel, Auteur ; Christian Ostrosky, Auteur ; Santiago Krapovickas, Auteur ; Andres J. Bosso, AuteurThe Aguapey river basin in the Pampas grasslands of Argentina is the last refuge for a complete assemblage of globally threatened and Near Threatened birds. We evaluated the influence of landscape characteristics on the occurrence and abundance [...]
Article
Rosendo M. Fraga, Auteur ; Hernan Casanas, Auteur ; German Pugnali, AuteurBased on 21,518 km of road surveys, the Argentinian range of the endangered Saffron-cowled Blackbird Xanthopsar flavus now seems confined to two small and disjunct areas in Corrientes and Entre Rios provinces, north-east Argentina. In Corrientes[...]
Article
Ignacio Roesler, Auteur ; Santiago Imberti, Auteur ; Hernan Casanas, Auteur ; Noelia Volpe, AuteurThe Hooded Grebe Podiceps gallardoi has been uplisted to globally 'Endangered' recently mainly because of the rapid population decline suffered within the last 20 years due to factors such as nest depredation by Kelp Gull Larus dominicanus as we[...]
