News - September 2018

Flora
Ranunculus apiifolius
Apio del diablo/Ranunculus apiifolius
© J. Simón Tagtachian
Ranunculus apiifolius
Apio del diablo/Ranunculus apiifolius
© Cora Rimoldi
Chinese wisteria
Wisteria sinensis
Glicina/Chinese wisteria
© Nicolás Giorgio
Chinese wisteria
Wisteria sinensis
Glicina/Chinese wisteria
© J. Simón Tagtachian
Prunus
Prunus sp.
Prunus sp
© J. Simón Tagtachian
Prunus
Prunus sp.
Prunus sp
© J. Simón Tagtachian
Bugweed
Solanum granulosum leprosum
Fumo bravo/Bugweed
© J. Simón Tagtachian
Lantana megapotamica
Lantana megapotamica
Lantana megapotamica
© J. Simón Tagtachian
Silk floss tree
Chorisia speciosa
Palo borracho/Silk floss tree
© J. Simón Tagtachian
Silk floss tree
Chorisia speciosa
Palo borracho/Silk floss tree
© J. Simón Tagtachian
Three-cornered leek
Allium triquetrum
Lágrima de la virgen/Three-cornered leek
© J. Simón Tagtachian
Wild teasel
Dipsacus fullonum
Cardencha/Wild teasel
© J. Simón Tagtachian
Water yellow flag
Iris pseudacorus
Lirio amarillo/Water yellow flag
© J. Simón Tagtachian
Calla lily
Zantedeschia aethiopica
Cala/Calla lily
© J. Simón Tagtachian



Golden-crowned Warbler
Basileuterus culicivorus
30-09-18 © Cora Rimoldi
As we had already assumed the reserve would be closed on Sunday 30th due to the Saturday's storm. The program was to walk along the sidewalk and find the large-billed tern, which Horacio had spotted on one of the islets at the Brasil end on Wednesday. And there it was with its robust yellow bill tucked up at the back. We were lucky since it awoke right away and action began. It timidly bothered the pochards, which did not react. Before such indifference the tern picked on the silver teal on the left. The teal did move aside due to its cocky attitude. Satisfied the tern began to preen. And the first raindrops began to fall but...
30-09-18 © Cora Rimoldi
we wanted to see the tricoulored back with open wings and stayed. Again the tern charged at the pochards, which did not get upset. Defeated it took flight, made a big turn to finally sit on the pole. Satisfied with the show we returned to Viamonte. The last part of the video is repeated in slow motion.
30-09-18 © Cora Rimoldi
As we were walking back to Viamonte and much to our surprise the tern surpassed us and gave us another flight demonstration. It flew in long and pronounced waves sliding down to the water and gaining height. It was clearly fishing. It did pick the water on one occasion but we did not see the tern catch anything.



Campo Flicker
Colaptes campestris
30-09-18 © Cora Rimoldi
Black-headed Duck
Heteronetta atricapilla
30-09-18 © Cora Rimoldi



Large-billed Tern
Phaetusa simplex
Large-billed Tern
30-09-18 © Lucas de Ciria
Large-billed Tern
30-09-18 © Lucas de Ciria
Large-billed Tern
30-09-18 © Lucas de Ciria
Large-billed Tern
30-09-18 © Lucas de Ciria
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
Yellow-chinned Spinetail
30-09-18 © Lucas de Ciria
Solitary Black Cacique
Cacicus solitarius
Solitary Black Cacique
30-09-18 © Lucas de Ciria
Rosy-billed Pochard
Netta peposaca
Rosy-billed Pochard
30-09-18 © Lucas de Ciria
Rosy-billed Pochard
30-09-18 © Lucas de Ciria

Screaming Cowbird
Molothrus rufoaxillaris
Screaming Cowbird
27-09-18 © Héctor Horacio García
Yellow-browed Tyrant
Satrapa icterophrys
Yellow-browed Tyrant
27-09-18 © Héctor Horacio García
Giant Wood-Rail
Aramides ypecaha
Giant Wood-Rail
27-09-18 © Héctor Horacio García
Fulvous Whistling-Duck
Dendrocygna bicolor
Fulvous Whistling-Duck
27-09-18 © Héctor Horacio García
Shiny Cowbird
Molothrus bonariensis
Shiny Cowbird
27-09-18 © Héctor Horacio García
Silver Teal
Anas versicolor
Silver Teal
27-09-18 © Héctor Horacio García



Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
22-09-18 © Héctor Horacio García
Rusty-collared Seedeater
Sporophila collaris
Rusty-collared Seedeater
22-09-18 © Héctor Horacio García
Gray-necked Wood-Rail
Aramides cajaneus
Gray-necked Wood-Rail
22-09-18 © Héctor Horacio García
Checkered Woodpecker
Veniliornis mixtus
Checkered Woodpecker
22-09-18 © Héctor Horacio García
Creamy-bellied Thrush
Turdus amaurochalinus
Creamy-bellied Thrush
22-09-18 © Héctor Horacio García
Rufous-bellied Thrush
Turdus rufiventris
Rufous-bellied Thrush
22-09-18 © Héctor Horacio García



Fauna
White-eared Opossum
Didelphis albiventris
Comadreja overa/White-eared Opossum
2-9-18 © Sergio Cusano
Brazilian Guinea pig
Cavia pamparum
Cuis/Brazilian Guinea pig
8-9-18 © Javier González
Coypu
Myocastor coypus
Coipo/Coypu
24-9-18 © María de las Mercedes Martínez
Coypu
Myocastor coypus
Coipo/Coypu
22-9-18 © J. Simón Tagtachian
Coypu
Myocastor coypus
Coipo/Coypu
22-9-18 © J. Simón Tagtachian
Coypu
Myocastor coypus
Coipo/Coypu
23-9-18 © Javier González
Side-necked Turtle
Phrynops hilarii
Tortuga de laguna/Side-necked Turtle
26-9-18 © Nicolás Giorgio
Side-necked Turtle
Phrynops hilarii
Tortuga de laguna/Side-necked Turtle
24-9-18 © María de las Mercedes Martínez
Side-necked Turtle
Phrynops hilarii
Tortuga de laguna/Side-necked Turtle
20-9-18 © J. Simón Tagtachian
Side-necked Turtle
Phrynops hilarii
Tortuga de laguna/Side-necked Turtle
11-9-18 © Nicolás Giorgio
Painted Turtle
Trachemys dorbignyi
Tortuga pintada/Painted Turtle
8-9-18 © J. Simón Tagtachian
Painted Turtle
Trachemys dorbignyi
Tortuga de laguna/Side-necked Turtle
20-9-18 © J. Simón Tagtachian

Camuati Wasp
Polybia scutellaris
Camuati Wasp
20-09-18 © J. Simón Tagtachian
Camuati Wasp
20-09-18 © J. Simón Tagtachian



Large-billed Tern
Phaetusa simplex
Large-billed Tern
27-09-18 © Héctor Horacio García
Large-billed Tern
27-09-18 © Héctor Horacio García
Large-billed Tern
27-09-18 © Héctor Horacio García
Black-necked Stilt
Himantopus mexicanus
Black-necked Stilt
27-09-18 © J. Simón Tagtachian
White-tipped Dove
Leptotila verreauxi
White-tipped Dove
27-09-18 © J. Simón Tagtachian
Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
27-09-18 © J. Simón Tagtachian

With inferior mandible recurved

Black-crowned Night-Heron
Nycticorax nycticorax
Black-crowned Night-Heron
27-09-18 © J. Simón Tagtachian
Bare-faced Ibis
Phimosus infuscatus
Bare-faced Ibis
27-09-18 © J. Simón Tagtachian
Rufous Hornero
Furnarius rufus
Rufous Hornero
27-09-18 © J. Simón Tagtachian

Nest ready at Canal Viamonte

Rufous Hornero
20-09-18 © J. Simón Tagtachian

Nest under construction at Canal viamonte

Rufous Hornero
27-09-18 © J. Simón Tagtachian

Nest under construction at the entrance of the new viewpoint

Green-winged Saltator
Saltator similis
Green-winged Saltator
27-09-18 © J. Simón Tagtachian
Whistling Heron
Syrigma sibilatrix
Whistling Heron
27-09-18 © J. Simón Tagtachian
Pied-billed Grebe
Podilymbus podiceps
Pied-billed Grebe
27-09-18 © J. Simón Tagtachian
Brown-chested Martin
Progne tapera
Brown-chested Martin
27-09-18 © J. Simón Tagtachian
Brown-chested Martin
27-09-18 © J. Simón Tagtachian
Yellow-browed Tyrant
Satrapa icterophrys
Yellow-browed Tyrant
27-09-18 © J. Simón Tagtachian
Sayaca Tanager
Thraupis sayaca
Sayaca Tanager
22-09-18 © J. Simón Tagtachian
Sayaca Tanager
27-09-18 © J. Simón Tagtachian
Blue-and-yellow Tanager
Pipraeidea bonariensis
Blue-and-yellow Tanager
27-09-18 © J. Simón Tagtachian

Eating loquat Eriobotrya japonica

Chimango Caracara
Milvago chimango
Chimango Caracara
27-09-18 © J. Simón Tagtachian
Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
27-09-18 © J. Simón Tagtachian

Green-barred Woodpecker
Colaptes melanochloros
Green-barred Woodpecker
25-09-18 © Nicolás Giorgio
Great Egret
Ardea alba
Great Egret
25-09-18 © Nicolás Giorgio
European Starling
Sturnus vulgaris
European Starling
25-09-18 © Nicolás Giorgio

Examining potential nests

Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
25-09-18 © Nicolás Giorgio
Silver Teal
Anas versicolor
Silver Teal
25-09-18 © Nicolás Giorgio
House Wren
Troglodytes aedon
House Wren
25-09-18 © Nicolás Giorgio
Neotropic Cormorant
Phalacrocorax brasilianus
Neotropic Cormorant
19-08-18 © Nicolás Giorgio
Rosy-billed Pochard
Netta peposaca
Rosy-billed Pochard
19-09-18 © Nicolás Giorgio
White-browed Blackbird
Sturnella superciliaris
White-browed Blackbird
23-09-18 © Javier Guillermo González
White-browed Blackbird
23-09-18 © Lucas de Ciria
Green-winged Saltator
Saltator similis
Green-winged Saltator
23-09-18 © Javier Guillermo González
Snail Kite
Rostrhamus sociabilis
Snail Kite
23-09-18 © Javier Guillermo González
Snail Kite
23-09-18 © Lucas de Ciria
Spectacled Tyrant
Hymenops perspicillatus
Spectacled Tyrant
23-09-18 © Lucas de Ciria
Blue-and-yellow Tanager
Pipraeidea bonariensis
Blue-and-yellow Tanager
23-09-18 © Lucas de Ciria
Blue-and-yellow Tanager
23-09-18 © Javier Guillermo González
Roadside Hawk
Rupornis magnirostris
Roadside Hawk
23-09-18 © Lucas de Ciria
Southern Screamer
Chauna torquata
Southern Screamer
23-09-18 © Javier Guillermo González
Checkered Woodpecker
Veniliornis mixtus
Checkered Woodpecker
23-09-18 © Javier Guillermo González
Checkered Woodpecker
23-09-18 © Lucas de Ciria
Cocoi Heron
Ardea cocoi
Cocoi Heron
23-09-18 © Lucas de Ciria
Black-and-rufous Warbling-Finch
Poospiza nigrorufa
Black-and-rufous Warbling-Finch
23-09-18 © Javier Guillermo González
Black-and-rufous Warbling-Finch
23-09-18 © Lucas de Ciria




Grey-throated Warbling-Finch
Microspingus cabanisi
Monterita litoraleña/Grey-throated Warbling-Finch
23-9-18 © Javier González
Monterita litoraleña/Grey-throated Warbling-Finch
23-9-18 © Lucas De Ciria
Grassland Yellow-Finch
Sicalis luteola
Corbatita dominó/Rusty-collared Seedeater
23-9-18 © Javier González



Roseate Spoonbill
Platalea ajaja
Roseate Spoonbill
22-09-18 © J. Simón Tagtachian
Coscoroba Swan
Coscoroba coscoroba
Coscoroba Swan
22-09-18 © J. Simón Tagtachian
White-browed Blackbird
Sturnella superciliaris
White-browed Blackbird
22-09-18 © J. Simón Tagtachian
Snail Kite
Rostrhamus sociabilis
Snail Kite
22-09-18 © J. Simón Tagtachian
Snail Kite
22-09-18 © J. Simón Tagtachian
Snail Kite
22-09-18 © J. Simón Tagtachian
Masked Yellowthroat
Geothlypis aequinoctialis
Masked Yellowthroat
22-09-18 © J. Simón Tagtachian
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
Yellow-chinned Spinetail
22-09-18 © J. Simón Tagtachian
Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
22-09-18 © J. Simón Tagtachian
Vermilion Flycatcher
22-09-18 © J. Simón Tagtachian
Sayaca Tanager
Thraupis sayaca
Sayaca Tanager
22-09-18 © J. Simón Tagtachian
Glittering-bellied Emerald
Chlorostilbon lucidus
Glittering-bellied Emerald
22-09-18 © J. Simón Tagtachian

At hairy Indian mallow Abutilon grandifolium

Narrow-billed Woodcreeper
Lepidocolaptes angustirostris
Narrow-billed Woodcreeper
22-09-18 © J. Simón Tagtachian
Southern Caracara
Caracara plancus
Southern Caracara
22-09-18 © J. Simón Tagtachian
White-winged Coot
Fulica leucoptera
White-winged Coot
22-09-18 © J. Simón Tagtachian

Chiloe Wigeon
Anas sibilatrix
Chiloe Wigeon
21-09-18 © Gustavo F. Brahamian
Chiloe Wigeon
21-09-18 © María de las Mercedes Martínez
Cocoi Heron
Ardea cocoi
Cocoi Heron
21-09-18 © María de las Mercedes Martínez
Cocoi Heron
21-09-18 © Gustavo F. Brahamian
Great Egret
Ardea alba
Great Egret
21-09-18 © Gustavo F. Brahamian
Roadside Hawk
Rupornis magnirostris
Roadside Hawk
21-09-18 © María de las Mercedes Martínez
Ringed Teal
Callonetta leucophrys
Ringed Teal
21-09-18 © Gustavo F. Brahamian
Ringed Teal
21-09-18 © Gustavo F. Brahamian
Ringed Teal
21-09-18 © Gustavo F. Brahamian
Ringed Teal
21-09-18 © Gustavo F. Brahamian
Rosy-billed Pochard
Netta peposaca
Rosy-billed Pochard
21-09-18 © Gustavo F. Brahamian
Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
21-09-18 © Gustavo F. Brahamian

With Spot-flanked gallinule

Yellow-billed Cardinal
Paroaria capitata
Yellow-billed Cardinal
21-09-18 © Gustavo F. Brahamian
Whistling Heron
Syrigma sibilatrix
Whistling Heron
21-09-18 © Gustavo F. Brahamian

Spot-winged Pigeon
Patagioenas maculosa
Paloma manchada/Spot-winged Pigeon
21-9-18 © Gustavo F. Brahamian



Época de reproducción
Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
20-09-18 © J. Simón Tagtachian

The beginning of the nest was recorded on Agust 11th. Shortly the chicks will hatch

Southern Screamer
Chauna torquata
Southern Screamer
21-09-18 © María de las Mercedes Martínez
Rufous Hornero
Furnarius rufus
Rufous Hornero
20-09-18 © J. Simón Tagtachian

Nest under construction at Canal viamonte

Giant Wood-Rail
Aramides ypecaha
Giant Wood-Rail
20-09-18 © J. Simón Tagtachian
Giant Wood-Rail
20-09-18 © J. Simón Tagtachian
Giant Wood-Rail
20-09-18 © J. Simón Tagtachian
Giant Wood-Rail
20-09-18 © J. Simón Tagtachian

Diademed Tanager
Stephanophorus diadematus
Diademed Tanager
20-09-18 © J. Simón Tagtachian
Diademed Tanager
20-09-18 © J. Simón Tagtachian
Diademed Tanager
20-09-18 © J. Simón Tagtachian
Grassland Yellow-Finch
Sicalis luteola
Grassland Yellow-Finch
20-09-18 © J. Simón Tagtachian
Grassland Yellow-Finch
20-09-18 © J. Simón Tagtachian
Grassland Yellow-Finch
20-09-18 © J. Simón Tagtachian
Gray-hooded Gull
Chroicocephalus cirrocephalus
Gray-hooded Gull
20-09-18 © J. Simón Tagtachian
Gray-hooded Gull
20-09-18 © J. Simón Tagtachian

The dorsal side of the wing with black and white interspersed

Black-crowned Night-Heron
Nycticorax nycticorax
Black-crowned Night-Heron
20-09-18 © J. Simón Tagtachian
Black-crowned Night-Heron
20-09-18 © J. Simón Tagtachian

Seven indviduals

White-tipped Dove
Leptotila verreauxi
White-tipped Dove
20-09-18 © J. Simón Tagtachian
Rusty-collared Seedeater
Sporophila collaris
Rusty-collared Seedeater
20-09-18 © J. Simón Tagtachian
Rusty-collared Seedeater
20-09-18 © J. Simón Tagtachian
Rusty-collared Seedeater
20-09-18 © J. Simón Tagtachian
Rusty-collared Seedeater
20-09-18 © J. Simón Tagtachian
White-eyed Parakeet
Psittacara leucophtalmus
White-eyed Parakeet
20-09-18 © J. Simón Tagtachian

Eating fruit of tipu tree Tipuana tipu

White-eyed Parakeet
20-09-18 © J. Simón Tagtachian
Limpkin
Aramus guarauna
Limpkin
20-09-18 © J. Simón Tagtachian
Limpkin
20-09-18 © J. Simón Tagtachian
Limpkin
20-09-18 © J. Simón Tagtachian
Limpkin
20-09-18 © J. Simón Tagtachian
Yellow-chevroned Parakeet
Brotogeris chiriri
Yellow-chevroned Parakeet
20-09-18 © J. Simón Tagtachian
Masked Duck
Nomonyx dominicus
Masked Duck
20-09-18 © J. Simón Tagtachian
Silver Teal
Anas versicolor
Silver Teal
20-09-18 © J. Simón Tagtachian

Showing the speculum as it preens

Roadside Hawk
Rupornis magnirostris
Roadside Hawk
20-09-18 © J. Simón Tagtachian

Chotoy Spinetail
Schoeniophylax phryganophilus
Chotoy Spinetail
22-09-18 © Sergio Cusano
Chotoy Spinetail
22-09-18 © Sergio Cusano
White-barred Piculet
Picumnus cirratus
White-barred Piculet
22-09-18 © Sergio Cusano

First time a pair is seen together. Sergio even saw the pair mate

White-barred Piculet
22-09-18 © Sergio Cusano
Rufous Hornero
Furnarius rufus
Rufous Hornero
22-09-18 © Sergio Cusano
Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
22-09-18 © Sergio Cusano
Whistling Heron
Syrigma sibilatrix
Whistling Heron
22-09-18 © Sergio Cusano
Screaming Cowbird
Molothrus rufoaxillaris
Screaming Cowbird
22-09-18 © Sergio Cusano
Black-necked Swan
Cygnus melancoryphus
Black-necked Swan
22-09-18 © Sergio Cusano

Today only four swans and there had been almost 40

Yellow-billed Cardinal
Paroaria capitata
Yellow-billed Cardinal
22-09-18 © Sergio Cusano
Nenday Parakeet
Aratinga nenday
Nenday Parakeet
22-09-18 © Sergio Cusano

Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
15-09-18 © J. Simón Tagtachian
Rufescent Tiger-Heron
15-09-18 © J. Simón Tagtachian
We normally watch the tiger-heron catch a fish or an eel, here the prey is yellow-billed teal duckling. The duckling belonged to a family in Canal Viamonte and this tiger-heron may be the one nesting a bit further on a tipu tree. The Saturday before the ducklings had been attacked by a Harris's Hawk and saved their skin. Their parents protected them but this Saturday this duckling was not that lucky. The video does not show the tragic end.
22-09-18 © Jorgelina Pérez

Nacunda nighthawk
Chordeiles nacunda
19-09-18 © Julián Hernández
(View in full scene recommended. Click on bottom right icon)
"A nacunda nighthawk (Chordeiles - Podager- nacunda) taking off from a vegetation mat in Coypu Pond. It flew off when two caracaras (Caracara plancus) landed on the same mat searching for food. The Southern lapwings (Vanellus chilensis) moving around began to scream, chase the raptors causing a hell of a mess among all the species. Ducks also took off and so did birds (of different species) as quick as possible and in any direction. The nacunda flew in big and high circles, then round the pond flying low, near the water. The Reserve was closed on that day, though walking along the sidewalk (always carefully) gave us this pleasant surprise. Time: 5:30 pm, sunny day with scattered clouds and hot". Julián Hernández



Red-crested Finch
Coryphospingus cucullatus
Red-crested Finch
05-09-18 © Pablo Villar
Red-crested Finch
05-09-18 © Pablo Villar
Red-crested Finch
05-09-18 © Pablo Villar
Red-crested Finch
05-09-18 © Pablo Villar

Grassland Sparrow
Ammodramus humeralis
Grassland Sparrow
15-09-18 © J. Simón Tagtachian
Grassland Sparrow
15-09-18 © J. Simón Tagtachian
Rusty-collared Seedeater
Sporophila collaris
Rusty-collared Seedeater
15-09-18 © J. Simón Tagtachian
Rusty-collared Seedeater
15-09-18 © J. Simón Tagtachian
Wren-like Rushbird
Phleocryptes melanops
Wren-like Rushbird
15-09-18 © J. Simón Tagtachian
Hepatic Tanager
Piranga flava
Hepatic Tanager
15-09-18 © J. Simón Tagtachian
White-tipped Dove
Leptotila verreauxi
White-tipped Dove
15-09-18 © J. Simón Tagtachian
Snail Kite
Rostrhamus sociabilis
Snail Kite
15-09-18 © J. Simón Tagtachian
Snail Kite
15-09-18 © J. Simón Tagtachian
Maguari Stork
Ciconia maguari
Maguari Stork
15-09-18 © J. Simón Tagtachian
Maguari Stork
15-09-18 © J. Simón Tagtachian
Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
15-09-18 © J. Simón Tagtachian
Black-headed Duck
Heteronetta atricapilla
Black-headed Duck
15-09-18 © J. Simón Tagtachian
Lake Duck
Oxyura vittata
Lake Duck
15-09-18 © J. Simón Tagtachian
Gilded Hummingbird
Hylocharis chrysura
Gilded Hummingbird
15-09-18 © J. Simón Tagtachian



Grassland Sparrow
Ammodramus humeralis
Grassland Sparrow
15-09-18 © Sergio Cusano
Grassland Sparrow
15-09-18 © Sergio Cusano
Scarlet-headed Blackbird
Amblyramphus holosericeus
Scarlet-headed Blackbird
15-09-18 © Sergio Cusano
Yellow-winged Blackbird
Agelasticus thilius
Yellow-winged Blackbird
15-09-18 © Sergio Cusano
Yellow-winged Blackbird
15-09-18 © Sergio Cusano
Pied-billed Grebe
Podilymbus podiceps
Pied-billed Grebe
15-09-18 © Sergio Cusano
Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
15-09-18 © Sergio Cusano
House Sparrow
Passer domesticus
House Sparrow
15-09-18 © Sergio Cusano



Fulvous Whistling-Duck x White-faced Whistling-Duck
Dendrocygna bicolor x viduata
Sirirí híbrido/Hybrid Whistling-duck
15-9-18 © Sergio Cusano
Sirirí híbrido/Hybrid Whistling-duck
15-9-18 © Sergio Cusano
When comparing the hybrid with the fulvous whistling-duck below, th hybrid has practically the plumage of the fulvous whistling-duck in its body, except for the black and white barring on the flank. It is on the head where the wite-faced whistling-duck's characteristics are evident
Sirirí colorado/Fulvous Whistling-duck
15-9-18 © Sergio Cusano

Rufous-browed Peppershrike
Cyclarhis gujanensis
Rufous-browed Peppershrike
13-09-18 © Matías Torreguitar
Harris's Hawk
Parabuteo unicinctus
Harris's Hawk
13-09-18 © Matías Torreguitar

The hawk landed on the nest carrying a prey in the bill. Another one almost adult and a juvenlie seemed to be protecting the nest


Spot-flanked Gallinule
Gallinula melanops
Spot-flanked Gallinule
11-09-18 © Nicolás Giorgio
Rock Pigeon
Columba livia
Rock Pigeon
11-09-18 © Nicolás Giorgio
European Starling
Sturnus vulgaris
European Starling
11-09-18 © Nicolás Giorgio
Saffron Finch
Sicalis flaveola
Saffron Finch
11-09-18 © Nicolás Giorgio
Hooded Siskin
Spinus magellanicus
Hooded Siskin
11-09-18 © Nicolás Giorgio
Roadside Hawk
Rupornis magnirostris
Roadside Hawk
11-09-18 © Nicolás Giorgio
Great Kiskadee
Pitangus sulphuratus
Great Kiskadee
11-09-18 © Nicolás Giorgio



Magnificent Frigatebird
Fregata magnificens
Magnificent Frigatebird
08-09-18 © Javier Guillermo González
Magnificent Frigatebird
08-09-18 © Javier Guillermo González
Magnificent Frigatebird
08-09-18 © J. Simón Tagtachian

The frigate bird is not welcomed by other birds. It has the habit of stealing the product of the hunt. There were 7 or 8 sterns surrounding it

Lesser Yellowlegs
Tringa flavipes
Lesser Yellowlegs
08-09-18 © Héctor Horacio García
Lesser Yellowlegs
08-09-18 © Javier Guillermo González
Lesser Yellowlegs
08-09-18 © Javier Guillermo González
Lesser Yellowlegs
08-09-18 © J. Simón Tagtachian
Lesser Yellowlegs
08-09-18 © J. Simón Tagtachian
Southern Martin
Progne elegans
Southern Martin
08-09-18 © Javier Guillermo González
Southern Martin
08-09-18 © Javier Guillermo González
Southern Martin
08-09-18 © J. Simón Tagtachian
Southern Martin
04-09-18 © J. Simón Tagtachian
Snail Kite
Rostrhamus sociabilis
Snail Kite
08-09-18 © J. Simón Tagtachian
A las 10 de la mañana volaba este individuo solo. Dos horas más tarde un grupo de 20
Snail Kite
08-09-18 © J. Simón Tagtachian
White-barred Piculet
Picumnus cirratus
White-barred Piculet
08-09-18 © J. Simón Tagtachian
Warbling Doradito
Pseudocolopteryx flaviventris
Warbling Doradito
08-09-18 ©
Warbling Doradito
08-09-18 ©
Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
08-09-18 © J. Simón Tagtachian
Vermilion Flycatcher
08-09-18 © Héctor Horacio García
The 10 am vermilion flycatcher
Vermilion Flycatcher
08-09-18 © J. Simón Tagtachian
Vermilion Flycatcher
08-09-18 © Javier Guillermo González
The 12 am vermilion flycatcher
Vermilion Flycatcher
08-09-18 © Javier Guillermo González
The 5 pm vermilion flycatcher
Black-necked Stilt
Himantopus mexicanus
Black-necked Stilt
08-09-18 © J. Simón Tagtachian

With white-faced whistling-duck, yellow-bill teal and fulvous whistling-ducks from left to right

Black-necked Stilt
08-09-18 © Javier Guillermo González
White-faced Ibis
Plegadis chihi
White-faced Ibis
08-09-18 © J. Simón Tagtachian
White-faced Ibis
08-09-18 © J. Simón Tagtachian
Bare-faced Ibis
Phimosus infuscatus
Bare-faced Ibis
08-09-18 © J. Simón Tagtachian
Bare-faced Ibis
08-09-18 © J. Simón Tagtachian
Rosy-billed Pochard
Netta peposaca
Rosy-billed Pochard
30-09-18 © Lucas de Ciria
Scarlet-headed Blackbird
Amblyramphus holosericeus
Scarlet-headed Blackbird
08-09-18 © J. Simón Tagtachian
Glittering-bellied Emerald
Chlorostilbon lucidus
Glittering-bellied Emerald
08-09-18 © J. Simón Tagtachian
Glittering-bellied Emerald
08-09-18 © J. Simón Tagtachian

At climbing aloe Aloe ciliaris

Green-winged Saltator
Saltator similis
Green-winged Saltator
08-09-18 © Héctor Horacio García
Green-winged Saltator
08-09-18 © Javier Guillermo González
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Blue-billed Black-Tyrant
08-09-18 © J. Simón Tagtachian
Sooty-fronted Spinetail
Synallaxis frontalis
Sooty-fronted Spinetail
08-09-18 © Silvia Sokolovsky
Maguari Stork
Ciconia maguari
Maguari Stork
08-09-18 © Javier Guillermo González
Yellow-billed Pintail
Anas georgica
Yellow-billed Pintail
08-09-18 ©
White-eyed Parakeet
Psittacara leucophtalmus
White-eyed Parakeet
08-09-18 © J. Simón Tagtachian
Sayaca Tanager
Thraupis sayaca
Sayaca Tanager
08-09-18 © J. Simón Tagtachian
Chimango Caracara
Milvago chimango
Chimango Caracara
08-09-18 © Javier Guillermo González
Chimango Caracara
08-09-18 © Héctor Horacio García
Chimango Caracara
08-09-18 © Héctor Horacio García
Chimango Caracara
08-09-18 © Héctor Horacio García
Blue-and-yellow Tanager
Pipraeidea bonariensis
Blue-and-yellow Tanager
08-09-18 © J. Simón Tagtachian
Yellow-billed Teal
Anas flavirostris
Yellow-billed Teal
08-09-18 © Silvia Sokolovsky

A joint attack of yellow-billed teals against a conspecific. It was chased from the Duck to the Coypu Pond! Shouts and peckings went on for a long time

Red Shoveler
Anas platalea
Red Shoveler
08-09-18 © Héctor Horacio García
Red Shoveler
08-09-18 © J. Simón Tagtachian
Red Shoveler
08-09-18 © J. Simón Tagtachian
Yellow-browed Tyrant
Satrapa icterophrys
Yellow-browed Tyrant
08-09-18 © Javier Guillermo González
Southern Lapwing
Vanellus chilensis
Southern Lapwing
08-09-18 © Héctor Horacio García
Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
08-09-18 © J. Simón Tagtachian
Masked Duck
Nomonyx dominicus
Masked Duck
08-09-18 © Javier Guillermo González
Great Grebe
Podiceps major
Great Grebe
08-09-18 © Javier Guillermo González




Buff-winged Cinclodes
Cinclodes fuscus
Remolinera común/Buff-winged Cinclodes
8-9-18 © Javier González
The vermilion flycatcher makes out easily but could you find the buff-winged cinclodes?
Taguató común
Rupornis magnirostris
Taguató común/Roadside Hawk
8-9-18 © J. Simón Tagtachian
Quite often we find the hawk on the other side of the pond. In the water black-necked swans and several black-headed ducks.
Eared Dove
Zenaida auriculata
Torcaza común/Eared Dove
8-9-18 © Héctor Horacio García

Hybrid Whistling-duck
Dendrocygna bicolor x D. viduata
Sirirí hibrido/Hybrid whistling-duck
8-9-18 © Román Montero
Sirirí hibrido/Hybrid whistling-duck
8-9-18 © J. Simón Tagtachian
Sirirí hibrido/Hybrid whistling-duck
8-9-18 © J. Simón Tagtachian
Sirirí hibrido/Hybrid whistling-duck
8-9-18 © J. Simón Tagtachian
Certainly the same that Marco photographed on August, 28th. Since it is among White-faced whistling-duck, its mother is a White-faced Whistling-Duck and its father a Fulvous Whistling-Duck

Rufous-collared Sparrow - Zontrichia capensis


Rufous-collared Sparrow
08-09-18 © Héctor Horacio García
Rufous-collared Sparrow
08-09-18 © Héctor Horacio García
Rufous-collared Sparrow
08-09-18 © J. Simón Tagtachian
Rufous-collared Sparrow
08-09-18 © J. Simón Tagtachian

Without the postocular and subocular black lines it seems a sparrow with a white face. A leucism. We have been seeing this bird eating for some time now along with other conspecifics



Three common swallows at the reserve

These are the three of the most common swallows at the reserve. The Brown-chested Martin Progne tapera has not popped up yet. Unlike the others which combine white and blue, though different hues, the brown-chested Martin combines it with brown
Blue-and-white Swallow
08-09-18 © J. Simón Tagtachian

Blue-and-white Swallow Pygochelidon cyanoleuca

All-year round swallow. Ventrally white with black undertail coverts. Dorsally blue. Small size just like the white-rumped swallow.

White-rumped Swallow
08-09-18 © J. Simón Tagtachian

White-rumped Swallow Tachycineta leucorrhoa

It comes to breed and then leaves. All white ventrally. Dorsally blue and white rump. This characteristic differentiates it from the Chilean swallow Tachycineta leucopyga, which comes from the south to spend winter

Gray-breasted Martin
08-09-18 © J. Simón Tagtachian

Grey-breasted Martin Progne chalybea

It also comes to breed and leaves. Bigger in size than the previous ones. Ventrally white with greyish. Dorsally bluish black



Magnificent Frigatebird
Fregata magnificens
Magnificent Frigatebird
08-09-18 © J. Simón Tagtachian
Magnificent Frigatebird
08-09-18 © J. Simón Tagtachian
Magnificent Frigatebird
08-09-18 © J. Simón Tagtachian
Magnificent Frigatebird
08-09-18 © J. Simón Tagtachian
Magnificent Frigatebird
08-09-18 © J. Simón Tagtachian
After almost three years a new record of the Magnificent Frigatebird



salida 8 set 2018




Southern Martin
Progne elegans
Southern Martin
04-09-18 © J. Simón Tagtachian
Southern Martin
04-09-18 © J. Simón Tagtachian
Southern Martin
04-09-18 © J. Simón Tagtachian
Southern Martin
04-09-18 © J. Simón Tagtachian
Southern Martin
04-09-18 © J. Simón Tagtachian
White-tipped Dove
Leptotila verreauxi
White-tipped Dove
04-09-18 © J. Simón Tagtachian
Sooty-fronted Spinetail
Synallaxis frontalis
Sooty-fronted Spinetail
04-09-18 © J. Simón Tagtachian
Giant Wood-Rail
Aramides ypecaha
Giant Wood-Rail
04-09-18 © J. Simón Tagtachian
Picazuro Pigeon
Patagioenas picazuro
Picazuro Pigeon
04-09-18 © J. Simón Tagtachian

Tail feathers - Black-capped Warbling-Finch



Black-capped Warbling-Finch
30-08-18 © J. Simón Tagtachian
Not too frequently do we have the chance to see the black-capped warbling-finch's tail completely open. Moving restlessly and quickly in the bushes we can hardly discover this detail. But we must pay attention to it.
The tail feahters are known as rectrices. They are used to steer and brake when in flight. Only the central pair is attached to the pygostyle (last ossification of the column formed by several vertebrae fused). The remaining feathers are inserted in a fiber adipose mass.  
Black-capped Warbling-Finch
17-01-18 © J. Simón Tagtachian
The number of rectrices changes with the species and it is paired. Feathers are counted from the center outward. Passeriformes have 12 rectrices.
Black-capped Warbling-Finch
17-01-18 © J. Simón Tagtachian
When closed and from a dorsal point of view the central pair of rectrices is seen. The remaining feathers are stacked beneath them. As the tail spreads, the rectrices slide in a fan-like way. Half to one side and the other half to the other side. This is when we can see this white triangular design on both sides in the Black-capped Warbling-Finch.
Black-capped Warbling-Finch
08-07-14 © J. Simón Tagtachian
Ventrally the tail looks white when closed since the outer rectrices which are almost white all along form the other face of the tail. 
Black-capped Warbling-Finch
20-06-15 © J. Simón Tagtachian
When fanning the tail the black rectrices are exposed



Southern Martin
Progne elegans
Southern Martin
02-09-18 © Lucas de Ciria
Tufted Tit-Spinetail
Leptasthenura platensis
Tufted Tit-Spinetail
02-09-18 © Sergio Cusano
Chestnut-capped Blackbird
Chrysomus ruficapillus
Chestnut-capped Blackbird
02-09-18 © Guillermo Costa
Campo Flicker
Colaptes campestris
Campo Flicker
02-09-18 © Sergio Cusano
Scarlet-headed Blackbird
Amblyramphus holosericeus
Scarlet-headed Blackbird
02-09-18 © Lucas de Ciria
Maguari Stork
Ciconia maguari
Maguari Stork
02-09-18 © Sergio Cusano
Maguari Stork
02-09-18 © Guillermo Costa
Maguari Stork
02-09-18 © Guillermo Costa
Maguari Stork
02-09-18 © Guillermo Costa
Rusty-collared Seedeater
Sporophila collaris
Rusty-collared Seedeater
02-09-18 © Guillermo Costa
Rusty-collared Seedeater
02-09-18 © Sergio Cusano
Blue-and-white Swallow
Pygochelidon cyanoleuca
Blue-and-white Swallow
02-09-18 © Sergio Cusano
Snowy-crowned Tern
Sterna trudeaui
Snowy-crowned Tern
02-09-18 © Sergio Cusano
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Blue-billed Black-Tyrant
02-09-18 © Sergio Cusano
Black-necked Swan
Cygnus melancoryphus
Black-necked Swan
02-09-18 © Guillermo Costa

Spot-winged Pigeon
Patagioenas maculosa
Paloma manchada/Spot-winged Pigeon
2-9-18 © Sergio Cusano

Yellow-browed Tyrant
Satrapa icterophrys
Yellow-browed Tyrant
02-09-18 © Sergio Cusano
Gray-necked Wood-Rail
Aramides cajaneus
Gray-necked Wood-Rail
02-09-18 © Lucas de Ciria
Great Grebe
Podiceps major
Great Grebe
02-09-18 © Sergio Cusano
Great Grebe
02-09-18 © Guillermo Costa
Pied-billed Grebe
Podilymbus podiceps
Pied-billed Grebe
02-09-18 © Guillermo Costa
Tropical Parula
Setophaga pitiayumi
Tropical Parula
02-09-18 © Guillermo Costa
House Wren
Troglodytes aedon
House Wren
02-09-18 © Guillermo Costa
Nenday Parakeet
Aratinga nenday
Nenday Parakeet
02-09-18 © Sergio Cusano

Eating loquat Eriobotryia japonica

Black-and-rufous Warbling-Finch
Poospiza nigrorufa
Black-and-rufous Warbling-Finch
02-09-18 © Guillermo Costa
Black-capped Warbling-Finch
Poospiza melanoleuca
Black-capped Warbling-Finch
02-09-18 © Guillermo Costa



Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
01-09-18 © J. Simón Tagtachian
Snowy-crowned Tern
Sterna trudeaui
Snowy-crowned Tern
01-09-18 © J. Simón Tagtachian
Snowy-crowned Tern
01-09-18 © J. Simón Tagtachian
Royal Tern
Thalasseus maximus
Royal Tern
01-09-18 © J. Simón Tagtachian
Royal Tern
01-09-18 © J. Simón Tagtachian
Great Grebe
Podiceps major
Great Grebe
01-09-18 © J. Simón Tagtachian
Great Grebe
01-09-18 © J. Simón Tagtachian
Black-headed Duck
Heteronetta atricapilla
Black-headed Duck
01-09-18 © J. Simón Tagtachian
Black-headed Duck
01-09-18 © J. Simón Tagtachian
Whistling Heron
Syrigma sibilatrix
Whistling Heron
01-09-18 © J. Simón Tagtachian
Limpkin
Aramus guarauna
Limpkin
01-09-18 © J. Simón Tagtachian
Spectacled Tyrant
Hymenops perspicillatus
Spectacled Tyrant
01-09-18 © J. Simón Tagtachian
Southern Screamer
Chauna torquata
Southern Screamer
01-09-18 © Javier Ubiría

This ringed screamer arrived at the reserve with the great flood some years ago. This is the second clutch here

Yellow-billed Teal
Anas flavirostris
Yellow-billed Teal
01-09-18 © J. Simón Tagtachian
Yellow-billed Teal
02-09-18 © Guillermo Costa
Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
01-09-18 © J. Simón Tagtachian

Still incubating



Masked and Lake Ducks
Nomonyx dominicus - Oxyura vittata
Pato fierro y zambullidor chico/Masked and Lake Ducks
1-9-18 © J. Simón Tagtachian
Both known as stiff-tailed ducks for the aspect of the tail. The masked duck (left) with the tail somewhat cocked up and the lake duck (right) with the tail under the water..