Cases of parasitism

All the cases of parasitism registered at the reserve.

Generalist: parasitizes different species - Specialist: 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. Obligate.
Parasitizing Masked yellowthroat
Geothlypis aequinoctialis
Masked Yellowthroat
08-01-05 © Carlos Ferrari
Masked Yellowthroat
14-01-06 © Jorge García Vicente
Masked Yellowthroat
21-12-12 © J. Simón Tagtachian
Parasitizing Rufous hornero
Furnarius rufus
Rufous Hornero
14-11-09 © Claudia y Tito Di Mauro
23-10-10 © Javier Menéndez
Parasitizing Yellow-winged blackbird
Agelasticus thilius
Yellow-winged Blackbird
29-12-07 © Jorge García Vicente
Yellow-winged Blackbird
19-11-17 © J. Simón Tagtachian

Two chicks at the same time. The yellow-winged blackbird feeding them and they claiming for more

Parasitizing Black-and-rufous warbling-finch
Poospiza nigrorufa
Black-and-rufous Warbling-Finch
18-12-04 © Jorge García Vicente
Black-and-rufous Warbling-Finch
17-12-05 © Roberto Ares
15-01-13 © Claudia y Tito Di Mauro
Black-and-rufous Warbling-Finch
22-12-12 © Claudia y Tito Di Mauro
Parasitizing Rufous-collared sparrow
Zonotrichia capensis
Southern Screamer
08-01-05 © Hugo Hulsberg
Parasitizing Chalk-browed mockingbird
Mimus saturninus
Chalk-browed Mockingbird
17-12-05 © Jorge García Vicente
Chalk-browed Mockingbird
18-12-10 © Mirta Ragonesi
Chalk-browed Mockingbird
12-12-15 © Eduardo Nicolás Cusano
Chalk-browed Mockingbird
28-01-17 © Dolores Fernández
Parasitizing Black-capped warbling-finch
Microspingus melanoleucus
Black-capped Warbling-Finch
29-12-07 © Jorge García Vicente
Black-capped Warbling-Finch
19-01-08 © Roberto Ares
Parasitizing Sooty-fronted spinetail
Synallaxis frontalis
Sooty-fronted Spinetail
19-01-08 © Jorge García Vicente
Parasitizing White-lined tanager
Tachyphonus rufus
White-lined Tanager
11-01-14 © Amelia Besana
Parasitizing Greyish baywing
Agelaioides badius
Greyish baywing parasitized by shiny cowbird
A shiny cowbird chick solves the problem to get food
Read more
Parasitizing Red-eyed vireo
Vireo olivaceus
27-11-16 © Juan Carlos Ferreyra
Red-eyed Vireo
17-12-16 © J. Simón Tagtachian
Red-eyed Vireo
29-12-16 © J. Simón Tagtachian



Screaming cowbird
Molothrus rufoaxillaris
Especialista. Obligado.
Parasitizing Greyish Baywing
Agelaioides badius
Greyish Baywing
02-03-13 © Juan Pablo Muszkats
Greyish Baywing
11-02-17 © Sergio Cusano
Screaming Cowbird
08-12-11 © Carlos González Ledo
Screaming Cowbird
29-02-20 © Javier Guillermo González

Black-headed duck
Heteronetta atricapilla
Generalista. Obligado.
Parasitizing Rosy-billed pochard
Netta peposaca
Black-headed Duck
19-11-17 © J. Simón Tagtachian

Fulvous whistling-duck
Dendrocygna bicolor
Generalista. Inter- intraespecífico. Facultativo.
Parasitizing Rosy-billed pochard
Netta peposaca
Rosy-billed Pochard
17-12-09 © José Luis Merlo
Rosy-billed Pochard
25-02-15 © Claudia y Diego Bastías