All cases of parasitism registered at the reserve.

Generalist: parasitizes different species - Specilist: parasitizes only one species
Interspecific: other species are parasitized - Intraspecific: parasitism within the same species
Obligate: no nest building. Obliged to parasitize - Facultative: build nests and can also parasitize

Shiny Cowbird Molothrus bonariensis Generalist. Interspecific. Obligate. Ten parasitized species. In all cases parasitism was detected when the little cowbird is a fledgeling. In only one case the host, Chalk-browed Mockingbird, is feeding two chicks
Parasitizing Masked Yellowthroat Geothlypis aequinoctialis
1 2005 © Carlos Ferrari	1 2006 © Carlos Ferrari
1 2012 © J. Simón Tagtachian
Parasitizing Rufous Hornero Furnarius rufus
11 2009 © Claudia y Tito Di Mauro
11-2011 © Javier Menendez
Parasitizing Yellow-winged Blackbird Agelasticus thilius
12 2007 © Carlos Ferrari	19-11-17 © J. Simón Tagtachian
Parasitizing Black-and-rufous Warbling-Finch Poospiza nigrorufa
12-2004 © Jorge García Vicente	12-2005 © Roberto Ares
12-2012 © Claudia y Tito Di Mauro
15-1-13 © Claudia y Tito Di Mauro
Parasitizing Rufous-collared Sparrow Zonotrichia capensis
1 2005 © Hugo Hulsberg
Parasitizing Chalk-browed Mockingbird Mimus saturninus
12 2005 © Jorge García Vicente	12 2010 © Mirta Ragonesi
12 12 2015 © Eduardo Cusano	28 1 17 © Dolores Fernández
Parasitizing Black-capped Warbling-Finch Poospiza melanoleuca
1 2007 © Jorge García Vicente	19 1 08 © Roberto Ares
Parasitizing Sooty-fronted Spinetail Synallaxis frontalis
1 2008 © Jorge García Vicente
Parasitizing House Wren Troglodytes aedon
11-2010 © Roberto Ares
Parasitizing White-lined Tanager Tachyphonus rufus
16 1 14 © Amelia Besana
Parasitizing Greyish Baywing Agelaioides badius
10-2013 © Silvia Vitale All the story in Parasitism - Shiny Cowbird
Parasitizing Red-eyed Vireo Vireo olivaceus
11-2016 © Juan Carlos Ferreyra
29-12-16 © J. Simón Tagtachian

Screaming Cowbird Molothrus rufoaxillaris Specialist (parasitizes basically Greyish Baywing). Interspecific. Obligate.

Parasitizing Greyish Baywing Agelaioides badius

© Carlos Gonzalez Ledo

Black-headed Duck Heteronetta atricapilla Generalist. Interespecific. Obligate.
Parasitizing Rosy-billed Pochard Netta peposaca
19-11-17 © J. Simón Tagtachian	19-11-17 © J. Simón Tagtachian

Fulvous Whistling-Duck Dendrocygna bicolor Generalist. Inter- and intraespecific. Facultative. Complete version of these two cases in Parasitism - Fulvous Whistling-Duck
Parasitizing Rosy-billed Pochard Netta peposaca
12 2009 © José Luis Merlo	2 2015 © Claudia y Diego Bastías