News - July 2016

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Brown-hooded Gull
Chroicocephalus maculipennis
Gaviota capucho café/Brown-hooded Gull

Gaviota capucho café/Brown-hooded Gull

Gaviota capucho café/Brown-hooded Gull29 7 16 © Gustavo F. Brahamian
Release of a this gull after rehabilitation. As usual birds are ringed before realease.
Sooty-fronted Spinetail
Synallaxis frontalis
Pijuí frente gris/Sooty-fronted Spinetail29 7 16 © Gustavo F. Brahamian
Great Egret
Podicpes major

30 7 16 © Cora Rimoldi
Una pareja prometedora
Great Kiskadee
Pitangus sulphuratus

30 7 16 © Cora Rimoldi
Benteveo armando nido



Assorted fauna and flora
Water snake
Erythrolamprus semiaureus
Culebra parda/Water snake© Gustavo F. Brahamian
Colubroidean Snake
Helicops infrataeniatus
Helicops infrateniatus© Sergio Cusano
Brazilian guinea pig
Cavia aperea
Cuis/Brazilian guinea pig© Román Montero
Monarch
Danaus erippus
Monarca/Monarch© Román Montero
Blue anise sage
Salvia guaranitica
Salvia azul/Blue anise sage© Sergio Cusano
Hairy Indian mallow
Abutilon pauciflorum
Malvavisco/Hairy Indian mallow© Sergio Cusano
Mandarin tree
Citrus reticulata
Mandarino/Mandarin tree© J. Simpon Tagtachian
Lemon tree
Citrus limon
Limonero/Lemon tree© J. Simón Tagtachian
Banana plant
Musa paradisiaca
Banano/Banana plant© Sergio Cusano
Pacara earpod tree
Enterolobium contortisiliquum
Pacara earpod tree© Sergio Cusano
Indian shot
Canna indica
Achira roja/Indian shot© Sergio Cusano
Chinese privet
Ligustrum sinensis
Ligustrina/Chinese privet© Sergio Cusano

Lubber Grasshopper
Coryacris angustipennis
Lubber Grasshopper
16-07-16 © Elsa y Guillermo Marcaida
Hoverfly
Palpada sp
Hoverfly
16-07-16 © Elsa y Guillermo Marcaida
Camuati Wasp
Polybia scutellaris
Camuati Wasp
30-07-16 © Sergio Cusano

Last Saturday of July
A cold morning but too much joy: meeting for the 100th anniversary of Aves Argentinas
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Viudita pico celeste/Blue-billed Black-Tyrant30 7 16 © Jorge García

Viudita pico celeste/Blue-billed Black-Tyrant30 7 16 © Jorge García

Viudita pico celeste/Blue-billed Black-Tyrant30 7 16 © J. Simón Tagtachian
Black-headed Duck
Heteronetta atricapilla
Pato cabeza negra/Black-headed Duck30 7 16 © Sergio Cusano
Southern Beardless-Tyrannulet
Camptostoma obsoletum
Piojito silbón/Southern Beardless-Tyrannulet30 7 16 © Pablo Serur
Snail Kite
Rostrhamus sociabilis
Caracolero/Snail Kite30 7 16 © J. Simón Tagtachian
Shiny and Screaming Cowbirds
Molothrus bonariensis - M. rufoaxillaris
Tordos renegrido y pico corto/Shiny and Screaming Cowbird

Tordos renegrido y pico corto/Shiny and Screaming Cowbird30 7 16 © J. Simón Tagtachian
Two photos to see the differences between these two cowbirds. They belong to the Family Icteridae and both are parasitic (See cases of parasitism).
The violaceous blue of the Shiny Cowbird and the glossy black of the Screaming Cowbird. Bill length. Shorter in the Screaming Cowbird (in Spanish it takes its name from this difference) and longer in the Shiny Cowbird. The chestnut iris in the Screaming Cowbird and the dark iris in the Shiny Cowbird.
White lines on head show the sheaths of developing feathers
Tordo renegrido/Shiny Cowbird
Diademed Tanager
Stephanophorus diadematus
Frutero azul/Diademed Tanager30 7 16 © Sergio Cusano
Great Grebe
Podiceps major
Macá grande/Great Grebe30 7 16 © Sergio Cusano
White-tufted Grebe
Rollandia rolland
Macá común/Whjite-tufted Grebe30 7 16 © Sergio Cusano
The little grebe we found on 9th of July
Lake Duck
Oxyura vittata
Pato zambullidor chico/Lake Duck30 7 16 © Sergio Cusano
Two or three males are seen. No females
Rufescent Tiger-Heron
Tigrisoma lineatum
Hocó colorado/Rufescent Tiger-Heron30 7 16 © Sergio Cusano
Still incubating
Masked Duck
Nomonyx dominicus
Pato fierro/Masked Duck30 7 16 © Sergio Cusano
I counted 35 and later 40
White-winged Coot
Fulica lecuoptera
Gallareta chica/White-winged Coot30 7 16 © Sergio Cusano
There are two now
Yellow-browed Tyrant
Satrapa icterophrys
Suirirí amarillo/Yellow-browed Tyrant30 7 16 © J. Simón Tagtachian
Great Egret
Ardea alba
Garza blanca/Great Egret30 7 16 © Sergio Cusano
Showing egrets, feathers which grow in the breeding season
Southern Caracara
Caracara plancus
Carancho/Southern Caracara

Carancho/Southern Caracara30 7 16 © Sergio Cusano
Wattled Jacana
Jacana jacana
Jacana/Wattled Jacana30 7 16 © Sergio Cusano
Transición a adulto
Gilded Sapphire
Hylocharis chrysura
Picaflor bronceado/Gilded Sapphire30 7 16 © J. Simón Tagtachian
Yellow-billed Cardinal
Paroaria capitata
Cardenilla/Yellow-billed Cardinal30 7 16 © Sergio Cusano
Coscoroba Swan
Coscoroba coscoroba
Coscoroba/Coscoroba Swan23 7 16 © Gustavo F. Brahamian
23 7 16 © María de las Mercedes Martínez
Great Kiskadee
Pitangus sulphuratus
Benteveo común/Great Kiskadee23 7 16 © Gustavo F. Brahamian
Rosy-billed Pochard-Brazilian Teal
Netta peposaca - Amazonetta brasiliensis
Patos picazo-cutirí/Pochard-Brazilian Teal23 7 16 © Gustavo F. Brahamian
Brazilian Teal (bottom)
Egrets and turtles Garzas y tortugas/Egrets and turtles23 7 16 © Gustavo F. Brahamian
Snowy Egret (left), Great Egret (right) and Side-necked Turtles
Rufescent Tiger-Heron
Tigrisoma lineatum
Hocó colorado/Rufescent Tiger-Heron23 7 16 © Gustavo F. Brahamian
And the checklist also joins the round anniversaries 2006 - 2016
checklist 2016
La nueva versión 2016 sumando toda la información de estos 10 años

guiada botánica

Saturday 23rd
A cold and cloudy morning though by midday the wether got warmer. Only a few came and few people around
Black-headed Duck
Heteronetta atricapilla
Pato cabeza negra/Black-headed Duck23 7 16 © Román Montero
Scarlet-headed Blackbird
Amblyramphus holosericeus
Federal/Scarlet-headed Balckbird23 7 16 © Claudia Mon
Pied-billed Grebe
Podilymbus podiceps
Macá pico grueso/Pied-billed Grebe

Macá pico grueso/Pied-billed Grebe23 7 16 © Claudia Mon
Nesting near the Rufescent Tiger-Heron. Reference point the Munich builidng.
Masked Duck and Rufous-sided Crake
Nomonyx dominicus - Laterallus melanophaius
23 7 16 © Cora Rimoldi
At 8:30 the ducks were already active. I counted 25 though not all of them appear in the video. We hope this floating vegetation will not be removed since it is the only area which provides some protection. At the back two Rufous-sided Crakes appear at the end of the video.
White-winged Coot
Fulica leucoptera
Gallareta chica/White-winged Coot23 7 16 © Claudia Mon
Since a long time this coot has been absent and if we find it we see only one individual. Same thing is happening with the Spot-flanked Gallinule. These two species were very common and abundant
Sayaca Tanager
Thraupis sayaca

23 7 16 © Claudia Mon
Easting bugweed and discarding the peel
Masked Gnatcatcher - White-crested Tyrannulet
Polioptila dumicola - Serpophaga subcristata

23 7 16 © Cora Rimoldi
A synchronized duet between a masked gnatcatcher, which appears on the video, and a tyrannulet which was across the road. The tyrannulet begins and the gnatcatcher closes
Ringed Teal
Callonetta leucophrys
Pato de collar/Ringed Teal23 7 16 © Claudia Mon
White-tufted Grebe
Rollandia rolland

23 7 16 © Cora Rimoldi
Building relationships
Great Pampa-Finch
Embernagra platensis
Verdón/Great Pampa-Finch23 7 16 © Román Montero
White-faced Whistling-Duck
Dendrocygna viduata
Sirirí pampa/White-faced Whistling-Duck23 7 16 © Claudia Mon
Black-headed Duck
Heteronetta atricapilla
Pato cabeza negra/Black-headed Duck14 7 16 © Lui Pagano
Una pareja
Buff-winged Cinclodes
Cinclodes fuscus
Remolinera común/Buff-winged Cinclodes14 7 16 © Lui Pagano
Dos individuos
Suiriri Flycatcher
Suiriri suiriri
Suirirí común/Suiriri Flycatcher20 7 16 © Daniel J. Rodríguez

Suirirí común/Suiriri Flycatcher20 7 16 © Daniel J. Rodríguez



Buff-winged Cinclodes
Cinclodes fuscus
Remolinera común/Buff-winged Cinclodes17 7 16 © Gustavo F. Brahamian
Rufous-sided Crake
Laterallus melanophaius
Burrito común/Rufous-sided Crake17 7 16 © Gustavo F. Brahamian
Greyish Baywing
Agelaioides badius
Tordo músico/Greyish Baywing17 7 16 © Gustavo F. Brahamian
Plumbeous Rail
Pardirallus sanguinolentus
Gallineta común/Plumbeous Rail17 7 16 © Gustavo F. Brahamian
Rosy-billed Pochard
Netta peposaca
Pato picazo/Rosy-billed Pochard17 7 16 © Gustavo F. Brahamian
Yellow-billed Cardinal
Paroaria capitata
Cardenilla/Yellow-billed Cardinal17 7 16 © Gustavo F. Brahamian
A very cold Saturday
White-crested Elaenia
Elaenia albiceps
Fiofío silbón/White-crested Ealaenia16 7 16 © Pablo Serur

Fiofío silbón/White-crested Elaenia16 7 16 © Sergio Cusano

Fiofío silbón/White-crested Elaenia16 7 16 © Sergio Cusano
Grey-throated Warbling-Finch
Poospiza cabanisi
Monterita litoraleña/Grey-throated Warbling-Finch16 7 16 © Pablo Serur

Monterita litoraleña/Grey-throated Warbling-Finch16 7 16 © Elsa y Guillermo
White-tipped Plantcutter
Phytotoma rutila
Cortarramas/White-tipped Plantcutter16 7 16 © Sergio Cusano
Pato fierro
Nomonyx dominicus
Pato fierro/Masked Duck16 7 16 © Sergio Cusano
Very quiet in the floating vegetation Elsa counted 18 individuals.
Green-winged Saltator
Saltator similis
Pepitero verdoso/Green-winged Saltator16 7 16 © Sergio Cusano
Lake Duck
Oxyura vittata
Pato zambullidor chico/Lake Duck16 7 16 © Sergio Cusano
Unicoloured blackbird
Agelasticus cyanopus
Varillero negro/Unicoloured blackbird16 7 16 © Sergio Cusano
Great and Snowy Egrets Garzas y garcitas/Great and Snowy grets16 7 16 © Sergio Cusano
We had already said that a great number of egrets use this place as a roosting site. During the day most of them leave but some stay. Most of them are snowy egrets.
Black-capped Warbling-Finch
Poospiza melanoleuca
Monterita cabeza negra/Black-capped Warbling-Finch16 7 16 © Sergio Cusano
Brown-hooded Gull
Chroicocephalus maculipennis
Gaviota capucho café/Brown-hooded Gull16 7 16 © Sergio Cusano
Tide was low and a group of gulls was standing on the mudflat.
Great Grebe
Podiceps major
Macá grande/Great Grebe16 7 16 © Sergio Cusano
At the coast of the river
Campo Flicker
Colaptes campestris
Carpintero campestre/Campo Flicker16 7 16 © Sergio Cusano

Carpintero campestre/Campo Flicker16 7 16 © Elsa y Guillermo
The pair is still found at Viamonte Access
Coypu
Myocastor coypus

16 7 16 © Elsa y Guillermo
The small coypu was on the Lizard Path. It was so tame that it could be touched. Two adults probably its parents were twenty meters away. Being so docile is very risky.
Views of the fishermen's pier Vista muelle de pescadores/Fishermen's pier

Vista muelle de pescadores/Fishermen's pier16 7 16 © Sergio Cusano
Connected cloud Nube/Cloud16 7 16 © Sergio Cusano

Ghost spider
Arachosia praesignis
Ghost spider
08-07-16 © Román Montero
Ghost spider
08-07-16 © Román Montero
It belongs to the family Anyphaenidae. It is known as ghost spider for its pale or translucid colouration.

Bumblebee
Bombus bellicosus
Bumblebee
22-05-16 © Román Montero
A threatened native species. The decline in number is thought to be due to two factors. On one hand, alteration of the habitat. This species is associated to the native grassland and the land use change both to urbanization and agriculture. On the other, a characteristic in the construction of the nest would influence negatively in reproduction. This bumblebee covers the nest with a layer of wax which is believed to protect bumblebees from low temperatures and with climate change this would become harmful for the species.
Birds celebrating the Day of the Independence...
Snowy-crowned Tern
Sterna trudeaui
Gaviotín lagunero/Snowy-crowned Tern9 7 16 © Pablo Serur
White-tufted Grebe
Rollandia rolland

9 7 16 © Cora Rimoldi
Such a nuptial plumage is not to be expected at this time, bigger the surprise when Simón discovered the adult was carrying a chick. It must have been born quite recently since it only popped out its head to get food.
Rufescent Tiger-Heron
Tigrisoma lineatum
Hocó colorado/Rufescent Tiger-Heron
9 7 16 © J. Simón Tagtachian
Last week we saw two herons on the platform. Today one is sitting. Then it cut some twigs and sat again.
Sayaca Tanager
Thraupis sayaca
Celestino/Sayaca Tanager9 7 16 © J. Simón Tagtachian
Comiendo fruto de fumo bravo
Solanum granulosum leprosum
Blue-and-yellow Tanager
Pipraedidea bonariensis
Naranjero/Blue-and-yellow Tanager9 7 16 © J. Simón Tagtachian
Golden-billed Saltator
Saltator aurantiirostris
Pepitero de collar/Golden-billed Saltator9 7 16 © J. Simón Tagtachian
Eating dried flowers of loquat
Eriobotrya japonica
Great Grebe
Podiceps major
Macá grande/Great Grebe

Macá grande/Great Grebe8 7 16 © Gustavo F. Brahamian
First photo of a great grebe chick
Rusty-collared Seedeater
Sporophila collaris
Corbatita dominó/Rusty-collared Seedeater8 7 16 © Claudia Mon
Scrub Blackbird
Dives warszewiczi
Tordo de matorral/Scrub Blackbird8 7 16 © Román Montero
8 7 16 © Román Montero
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Viudita pico celeste/Blue-billed Black-Tyrant8 7 16 © Silvia González
Viudita pico celeste/Blue-billed Black-Tyrant8 7 16 © Dolores Fernández
White-banded Mockingbird
Mimus triurus
Calandria real/White-banded Mockingbird8 7 16 © Marcelo Leanes
Yellow-chevroned Parakeet
Brotogeris chiriri
Catita chirirí/Yellow-chevroned Parakeet8 7 16 © Sergio Cusano
White-tipped Plantcutter
Phytotoma rutila
Cortarramas/White-tipped Plantcutter8 7 16 © Silvia González

Cortarramas/White-tipped Plantcutter8 7 16 © Silvia González

Cortarramas/White-tipped Plantcutter8 7 16 © Silvia González
Sooty Tyrannulet
Serpophaga nigricans
Piojito gris/Sooty Tyrannulet8 7 16 © Sergio Cusano
Piojito gris/Sooty Tyrannulet8 7 16 © Silvia González
White-tipped Dove
Patagioenas maculosa
Paloma manchada/White-tipped Dove8 7 16 © Silvia González

Audio del 2 7 16 © Cora Rimoldi
Ultramarine Grosbeak
Cyanocompsa brissonii
Reinamora grande/Ultramarine Grosbeak8 7 16 © Sergio Cusano
Black-and-rufous Warbling-Finch
Poospiza nigrorufa
Sietevestidos/Black-and-rufous Warbling-Finch8 7 16 © Román Montero
Masked Duck
Nomonyx dominicus
Pato fierro/Masked Duck8 7 16 © Sergio Cusano
Pato fierro/Masked Duck8 7 16 © Silvia González
Southern Screamer
Chauna torquata
Chajá/Southern Screamer8 7 16 © Román Montero
Solitary Black Caciq
Cacicus solitarius
Boyero negrp/Solitary Black cacique8 7 16 © Román Montero
White-lined Tanager
Tachyphonus rufus
Frutero negro/White-lined Tanager8 7 16 © Román Montero
Male and female Frutero negro/White-lined Tanager8 7 16 © Román Montero
Saffron Finch
Sicalis flaveola
Jilguero dorado/Saffron Finch8 7 16 © Silvia González
Narrow-billed Woodcreeper
Lepidocolaptes angustirostris
Chinchero chico/Narrow-billed Woodcreeper8 7 16 © Marcelo Leanes
Con una ranita en el pico
Fulvous Whistling-Duck
Dendrocygna bicolor
sirirí colo SAG 8 7 168 7 16 © Silvia González
Spectacled Tyrant
Hymenops perspicillatus
Pico de plata/Spectacled Tyrant8 7 16 © Silvia González
Great Egret
Ardea alba
Garza blanca/Great Egret8 7 16 © Gustavo F. Brahamian
Snowy Egret
Egretta thula
Garcita blanca/Snowy Egret8 7 16 © Gustavo F. Brahamian
Coypu
Myocastor coypus
Coipo/Coypu8 7 16 © Gustavo F. Brahamian
Colubroidean snake
Helicops infrataeniatus
Culebra acuática común/Colubroidean snake8 7 16 © Marcelo Leanes
Urutu pit viper
Bothrops alternatus
Yarará grande/Urutu pit viper8 7 16 © Sergio Cusano

Yarará grande/Urutu pit viper8 7 16 © Dolores Fernández
Ultramarine Grosbeak
Cyanocompsa brissonii
Reinamora grande/Ultramarine Grosbeak7 7 16 © José Alberto Lell
Yellow-browed Tyrant
Satrapa icterophrys
Suirirí amarillo/Yellow-browed Tyrant7 7 16 © José Alberto Lell
Rufescent Tiger-Heron
Tigrisoma lineatumi
Hocó colorado/Rufescent Tiger-Heron7 7 16 © José Alberto Lell
Waterbird Survey organized by the COARECS - Saturday 2nd of July A grey but full of optimism. It resulted very fruitful. We found a few nice things. The RECS was closed and we began the walk along the outer sidewalkd of Coypu Pond counting the birds of the pond. As we reached the Brasil end the reserve opened and went to the Canal Carlota Roberts (former Canal Sudeste) and from there all along the coast to get out at Viamonte.
Mist and rain at times accompanied us all the walk till midday.
Grupo/group© Sergio Cusano
Vista río/View river© Sergio Cusano

Vista río/View river© Sergio Cusano

Vista río/View river© Sergio Cusano
Views of the river taken between the Canal Carlota Roberts and teh Meeting Point
Black-necked Stilt
Himantopus mexicanus
Tero real/Black-necked Stilt2 7 16 © Sergio Cusano
Two individuals flying above the river
Ringed Kingfisher
Megaceryle torquata
Martín pescador grande/Ringed Kingfisher2 7 16 © Sergio Cusano
For three weeks in a row the ringed kingfisher has been seen without fail flying and vocalizing to announce himself. Today it was also photographed perching on a branck at the Brasil end. Two individuals were seen flying together.
Southern Beardless-Tyrannulet
Camptostoma obsoletum
Piojito silbón/Southern Beardless-Tyrannulet2 7 16 © Sergio Cusano

Piojito silbón/Southern Beardless-Tyrannulet2 7 16 © Sergio Cusano

Piojito silbón/Southern Beardless-Tyrannulet2 7 16 © Sergio Cusano
This not so common tyrannulet says present again
Coscoroba Swan
Coscoroba coscoroba
Coscoroba/Coscoroba Swan2 7 16 © Sergio Cusano
Lake Duck
Oxyura vittata
Pato zambullidor chico/Lake Duck2 7 16 © Sergio Cusano
Masked Duck
Nomonyx dominicus
Pato fierro/Masked Duck2 7 16 © Sergio Cusano
Mourning Sierra-Finch
Phrygilus fruticeti
Yal negro/Mourning Sierra-Finch2 7 16 © Sergio Cusano
White-banded Mockingbird
Mimus triurus
Calandria real/White-banded Mockingbird2 7 16 © Sergio Cusano
Diademed Tanager
Stephanophorus diadematus
Frutero azul/Diademed Tanager2 7 16 © Sergio Cusano
White-tipped Dove
Letoptila verreauxi
Yerutí común/White-tipped Dove2 7 16 © Sergio Cusano
Campo Flicker
Colaptes campestris
Carpintero campestre/Campo Flicker2 7 16 © Sergio Cusano
Sayaca Tanager
Thraupis sayaca
Celestino/Sayaca Tanager2 7 16 © Sergio Cusano
Brown-hooded Gull
Chroicocephalus maculipennis
Gaviota capucho café/Brown-hooded Gull2 7 16 © Sergio Cusano
During the walk big groups flew past.
View of the reserve Vista desde un edificio/Vie from a building29 6 16 © Eduardo Ibarra

Vista desde un edificio/Vie from a building29 6 16 © Eduardo Ibarra
Eduardo saw from the building he works a great number of great egrets and counted 120.



Buff-winged Cinclodes
Cinclodes fuscus
remolinera común/Buff-winged Cinclodes22 4 16 © Daniel Rodríguez

remolinera común/Buff-winged Cinclodes22 4 16 © Daniel Rodríguez

remolinera común/Buff-winged Cinclodes22 4 16 © Daniel Rodríguez
A few photos, taken in April, of the buff-winged cinclodes, a winter visitor which is appearing too little