News - August 2015

A few butterflies
White-anged Sulphur
Anteos clorinde
Mancha de azufre/White-angled Sulphur© J. Simón Tagtachian
White-anged Sulphur
Anteos clorinde
Mancha de azufre/White-anged Sulphur© J. Simón Tagtachian
Remus Greenstreak
Cyanophrys remus
Frotadora esmeralda coluda/Remus Greenstreak© Gustavo F Brahamian
Lyssipoides Metalmark
Riodina lyssipoides
Danzarina chica/Lyssipoides Metalmark© Victoria Mansilla
Southamerican Lady
Vanessa braziliensis
Dama pintada/Southamerican Lady© Sergio Cusano
Common Yellow
Eurema deva
Limoncito común/Common Yellow© Sergio Cusano
Scarlet-headed Blackbird
Amblyramphus holosericeus
Federal/Scarlet-headed Blackbird© Claudia y Diego Bastías
Southern Beardless-Tyrannulet
Camptostoma obsoletum
Piojito silbón/Southern Beardless-Tyrannulet© Eduardo Soriano Grandes
Un registro de febrero de 2015, pero nada despreciable
Tropical Parula
Setophaga pitiayumi
Pitiayumí/Tropical Parula As I was greeting Walter, a security guard of the reserve, another guard approached him with a tropical parula he found fallen on the ground. Walter took it to the Rehabilitation Center. I was very glad to see such good disposition towards the bird.
© Favio Gustavo Belotto
Spectacled Tyrant
Hymenops perspicillatus
Pico de plata/Spectacled Tyrant© Favio Gustavo Belotto
Solitary Black Cacique
Cacicus solitarius
boyero negro/Solitary Black Cacique© Favio Gustavo Belotto

© Federico De Maio
Works on the coast Obras/Works

Obras/Works

carteles/boards

carteles/boards© Sergio Cusano
The coast has been affected by the heavy rains and the sudestada again and works to repair the area are being done. On this occasion the path was not closed and fences were set along the path to divide the transit for machines and people. Let's observe the regulation.
Ferruginous Pygmy-Owl
Glaucidium brasilianum
Caburé chico/Ferruginous Pygmy-Owl

Caburé chico/Ferruginous Pygmy-Owl© Elsa y Guillermo
White-tipped Dove
Leptotila verreauxi
Yerutí común/White-tipped Dove© Elsa y Guillermo
Harris's Hawk
Parabuteo unicinctus
Gavilán mixto/Harris's HawkSe vienen los gavilancitos © Victoria Mansilla
Stripe-backed Bittern
Ixobrychus involucris
Mirasol común/Stripe-backed Bittern27-8-2015 © Roberto Güller
Nacunda Nighthawk
Chordeiles nacunda
Ñacundá/Nacunda Nighthawk© Victoria Mansilla
Series of photos by Hugo Aguilar Hugo sends all his photos together. Here is a selection of those of August beginning with the first photo of Vermilion Flycatcher of the 2015-2016 season. He adds the Grey-breasted Martins and as a bonus a July straggler.
Vermilion Flycatcher
Pyrocephalus rubinus
Churrinche/Vermilion Flycatcher© Hugo Aguilar
Grey-breasted Martin
Progne chalybea
Golondrina doméstica/Grey-breasted Martin© Hugo Aguilar
Snail Kite
Rostrhamus sociabilis
Caracolero/Snail Kite© Hugo Aguilar

Caracolero/Snail Kite© Hugo Aguilar
Green Kingfisher
Chloroceryle americana
Martín pescador chico/Green KingfisherMale © Hugo Aguilar

Martín pescador chico/Green KingfisherFemale © Hugo Aguilar
Fawn-breasted Tanager
Pipraeidea melanonota
Saíra de antifaz/Fawn-breasted Tanager© Hugo Aguilar
White-tipped Plantcutter
Phytotoma rutila
Cortarramas/White-tipped Plantcutter© Hugo Aguilar
Neotropic Cormorant
Phalacrocorax brasilianus
Biguá/Neotropic Cormorant © Hugo Aguilar
See the toes are joined by webbing. As all four toes are webbed this foot is known as totipalmate. Webbing is an adaptation which aids in swimming.
Black-capped Warbling-Finch
Poospiza melanoleuca
Monterita cabeza negra/Black-capped Warbling-Finch© Hugo Aguilar
Thanks to the whale Germán saw the tern
New bird species: South American Tern
Sterna hirundinacea
Gaviotín sudamericano/South American Tern© Germán Pugnali

Gaviotín sudamericano/South American Tern© Germán Pugnali

Gaviotín sudamericano/South American Tern© Germán Pugnali

Gaviotín sudamericano/South American Tern© Germán Pugnali

The sighting was on August 4th. In fact it was the humpback whale which took me to the reserve. I saw it in the docks at aprox 9 am. I took some photographs, though never in open waters. The best was a video I took just as it was leaving the docks in the direction of the piers. From there on I tried to follow it from the Recs but with no luck. I could only see the Prefectura boats, which makes me assume the whale was near. I do not know whether it did swim into open waters.

As I was trying to spot the whale I met Christian Bisiau. Only a bit later the tern flew over the fishermen's pier. We saw a slim Sterna with long wings and very long rectrices. It was pale grey with a black hood (may be partial) and a long and thin bill. I consulted with Luis Pagano and we believe that the chances to consider it another species but a Sterna hirundinacea are low. I took some photos but they are not conclusive. Germán Pugnali

ballena jorobada/Humpback whale© Germán Pugnali
© Germán Pugnali
Chiloe Wigeon
Anas sibilatrix
Pato overo/Chiloe Wigeon© Eduardo Carreyra

Pato overo/Chiloe Wigeon© Eduardo Carreyra
Zully, Ignacio and I were writing the bird list meticulously and minutely in the penultimate overlook on Canal Sudeste before reaching the river.
We saw three individuals flying over the canal from the settlement to the river. They flew three times in circles near our position, as if they were watching the place but flew to the river and we lost sight of them.
Grey-breasted Martin
Progne chalybea
Golondrina doméstica/Grey-breasted Martin© Eduardo Carreyra
It is time to put away the winter birds list and take out the summer birds one. We already have one swallow and one martin and almost the Vermilion Flycatcher. It has not been spotted in Costanera yet but there are records in Ribera Norte.
Spot-winged Pigeon
Patagioenas maculosa
Paloma manchada/Spot-winged Pigeon© Sergio Cusano

Paloma manchada/Spot-winged Pigeon© Sergio Cusano
This Spot-winged Pigeon with a twig in its bill is building a nest in a
Tipuana tipu of the sidewalk. It fetched materials.

© Cora Rimoldi
Fulvous Whistling-Duck
Dendrocygna bicolor
Sirirí colorado/Fulvous Whistling-Duck© Sergio Cusano
Nanday Parakeet
Aratinga nenday
Ñanday/Nanday Parakeet© Sergio Cusano
Cocoi Heron
Ardea cocoi
Garza mora/Cocoi Heron© Sergio Cusano
Neotropic Cormorant
Phalacrocorax brasilianus
Biguá/Neotropic CormorantAt Coypu Pond © Sergio Cusano
Atypical Ducks 3 Ánade-Pekin vd/Mallard-Pekin Duck dv© Nicolás Giorgio

Ánade-Pekin vd/Mallard-Pekin Duck dv© Nicolás Giorgio

Ánade-Pekin vd/Mallard-Pekin Duck dv© Nicolás Giorgio

Ánade-Pekin vd/Mallard-Pekin Duck dv© Nicolás Giorgio

Ánade-Pekin vd/Mallard-Pekin Duck dv© Nicolás Giorgio
Both in Atypical Ducks and in Atypical Ducks 2 and in Pekin Duck some commentaries are made on their characteristics and history of these domestic ducks.
We know they come from the same species
Anas platyrhynchos and that they are the result of domestication by man. For this reason they are not included in field guides and are not well appreciated in reserves.
This Pekin male had already mated with its pair in January 2015. They were not lucky since all eggs disappeared. Further attempts to breed were not detected till Nicolás registered this event with a change of actors on Tuesday 18th.
He tells us that the mallar duck and the pekin duck were navigating in the pond and the other pekin duck was a bit far away. Within a fraction of a second the mating scene begins. The female shows receptive, the male mounts her, grasps her by the neck with the bill and after mating, the triumphal clousure.
¿What will result of this union if it thrives? We will be attentive.
Diademed Tanager
Stephanophorus diadematus
Frutero azul/Diademed Tanager © Claudia y Diego Bastías
Blue-and-yellow Tanager
Pipraeidea bonariensis
Naranjero/Blue-and-yellow Tanager © Claudia y Diego Bastías
Lake Duck
Oxyura vittata
Pato zambullidor chico/Lake Duck © Claudia y Diego Bastías
Roadside Hawk
Rupornis magnirostris
Taguató común/Roadside Hawk
© Gustavo F. Brahamian
Ringed Teal
Callonetta leucophrys
Pato de collar/Ringed Teal
© Gustavo F. Brahamian
Southern Caracara
Caracara plancus
Carancho/Southern Caracara
© Gustavo F. Brahamian
Campo Flicker
Colaptes campestris

© J. Simón Tagtachian
Fawn-breasted Tanager
Pipraeidea melanonota
Saíra de antifaz/Fawn-breasted Tanager© Claudia y Diego Bastías
Saíra de antifaz/Fawn-breasted Tanager© Claudia y Diego Bastías
© Claudia y Diego Bastías
Diego saw four individuals. Are they migrating?
White-rumped Swallow
Tachycineta leucorrhoa
Golondrina ceja blanca/White-rumped Swallow© J. Simón Tagtachian
Ferruginous Pygmy-Owl
Glaucidium brasilianum
Caburé chico/Ferruginous Pygmy-Owl© Nicolás Giorgio
White-tipped Plantcutter
Phytotoma rutila
Cortarramas/White-tipped Plantcutter© J. Simón Tagtachian
Coypu
Myocastor coypus
Coipo/Coypu© J. Simón Tagtachian

Coipo/Coypu© Claudia y Diego Bastías
Black-crowned Monjita
Xolmis coronatus
Monjita coronada/Black-crowned Monjita© Claudia y Diego Bastías
Monjita coronada/Black-crowned Monjita© Claudia y Diego Bastías
Monjita coronada/Black-crowned Monjita© Claudia y Diego Bastías
Buff-winged Cinclodes
Cinclodes fuscus
Remolinera común/Buff-winged Cinclodes© Sergio Cusano
Whistling Heron
Syrigma sibilitarix
Chiflón/Whistling Heron© Claudia y Diego Bastías
Yellow-billed Pintail
Anas georgica
Pato maicero/Yellow-billed Pintail© Claudia y Diego Bastías
Green-barred Woodpecker
Colaptes melanochlorosCarpintero real/Green-barred Woodpecker© Sergio Cusano
Rufous Hornero
Furnarius rufus
Hornero/Rufous Hornero© Claudia y Diego Bastías
Southern Caracara
Caracara plancus
Carancho/Southern CaracaraA juvenile with blood on the bill because it had a prey © Claudia y Diego Bastías
Views of Coypu Pond Vista de Coipos/View of Coypu Pond© Sergio Cusano
21 de agosto - El agua sigue sobre la vereda Vista de Coipos/View of Coypu Pond© Sergio Cusano

Vista de Coipos/View of Coypu Pond© Sergio Cusano

Vista de Coipos/View of Coypu Pond© Sergio Cusano

Vista de Coipos/View of Coypu Pond© Sergio Cusano
Work by Ezequiel Núñez Bustos on the Butterflies of the RECS trabajo ENB
Some butterflies and a turtle
Dichrous Skipper
Theagenes dichrous
Falcada ribereña/Dichrous Skipper© Victoria Mansilla
Mexican Silverspot
Dione moneta
Moneta/Mexican Silverspot© Victoria Mansilla
Chilean Lady
Vanessa carye
Dama manchada/Chilean Lady© Victoria Mansilla
Bella Mapwing
Hypanarthia bella
Bellísima común/Bella Mapwing© Victoria Mansilla
Claudina Crescent
Tegosa claudina
Claudina/Claudina Crescent© Victoria Mansilla
Side-necked Turtle
Phrynops hilarii
Tortuga de laguna/Side-necked Turtle© Nicolás Giorgio



Green Kingfisher
Chloroceryle americana

© Federico De Maio
Green Kingfisher
Chloroceryle americana

© Federico De Maio



And on holiday Monday the reserve opened
The Lake Duck and more
Lake Duck
Oxyura vittata
Pato zambullidor chico/Lake Duck© Elsa y Guillermo

Pato zambullidor chico/Lake Duck© Sergio Cusano

Pato zambullidor chico/Lake Duck© J. Simón Tagtachian

Pato zambullidor chico/Lake Duck© Sergio Cusano

Pato zambullidor chico/Lake Duck© Elsa y Guillermo
Spot-winged Pigeon
Patagioenas maculosa
Paloma manchada/Spot-winged Pigeon© Sergio Cusano
Yellow-browed Tyrant
Satrapa icterophrys
Suirirí amarillo/Yellow-browed Tyrant© J. Simón Tagtachian
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
Curutié colorado/Yellow-chinned Spinetail© J. Simón Tagtachian
Picui Ground Dove
Columbina picui
Torcacita común/Picui Ground Dove© Sergio Cusano

Torcacita común/Picui Ground Dove© Elsa y Guillermo
Rufous-sided Crake
Laterallus melanophaius
Burrito común/Rufous-sided Crake© Sergio Cusano
Cocoi Heron
Ardea cocoi
Garza mora/Cocoi Heron© J. Simón Tagtachian
White-tipped Plantcutter
Phytotoma rutila
Cortarramas/White-tipped Plantcutter© J. Simón Tagtachian
Coypu
Myocastor coypus
Coipo/Coypu© Elsa y Guillermo
Lake Duck
Oxyura vittata
Pato zambullidor chico/Lake Duck© Silvia Loiacono
Pato zambullidor chico/Lake Duck© Silvia Loiacono
Masked Duck
Nomonyx dominicus
Pato fierro/Masked Duck© Silvia Loiacono
Views of the sidewalk
Today, Saturday 15th, is the first sunny day after some 10 rainy days. The reserve was closed. The water level has changed little since August 11th.
Vista Coipos/View Coypu Pond© J. Simón Tagtachian

Vista Coipos/View Coypu Pond© J. Simón Tagtachian

Vista Coipos/View Coypu Pond© J. Simón Tagtachian

Vista Coipos/View Coypu Pond© J. Simón Tagtachian

In today's photo the meter rule is illegible. But from Gustavo's photo with the brand new meter rule we can deduce that water level reaches 1,26m. medidor/meter rule© J. Simón Tagtachian

medidor/meter rule© Gustavo F Brahamian
American Kestrel
Falco sparverius
Halconcito colorado/American KestrelNear La Alameda © J. Simón Tagtachian
Spectacled Tyrant
Hymenops perspicillatus
Pico de plata/Spectacled Tyrant© J. Simón Tagtachian
Coscoroba Swan
Coscoroba coscoroba
Coscoroba/Coscoroba Swan© J. Simón Tagtachian
Wattled Jacana and Red-fronted Coot
Jacana jacana - Fulica rufifrons
Acuática/Waterbirds© Gustavo F. Brahamian
White-tufted Grebe
Rollandia rolland
Macá común/White-tufted Grebe© Gustavo F. Brahamian
Spot-flanked Gallinule
Gallinula melanops
Pollona pintada/Spot-flanked Gallinule© Gustavo F. Brahamian
Common Gallinule
Gallinula galeata
Pollona negra/Common gallinule© Gustavo F. Brahamian
Yellow-chevroned Parakeet
Brotogeris chiriri
Catita chiriri/Yellow-chevroned Parakeet© Sergio Cusano
Seen in front of the pergola
Mottle-cheeked Tyrannulet
Phylloscartes ventralis
Mosqueta común/Mottle-cheeked Tyrannulet© Claudia y Diego Bastías
With a closed reserve Diego was the only one to get some registers and contributed with nothing less than this gem and he says there were two.
Masked Duck
Nomonyx dominicus
Pato fierro/Masked Duck© Sergio Cusano
Plumbeous Rail
Pardirallus sanguinolentus
Gallineta común/Plumbeous Rail© Claudia y Diego Bastías



Pied-billed Grebe
Podilymbus podiceps
Macá pico grueso/Pied-billed Grebe© Sergio Cusano
Wattled Jacana
Jacana jacana
Jacana/Wattled Jacana© Sergio Cusano
Coscoroba Swan
Coscoroba coscoroba
Coscoroba/Coscoroba Swan© Sergio Cusano
Limpkin
Aramus guarauna
Caraú/Limpkin© Sergio Cusano
Ringed Teal
Callonetta leucophrys
Pato de collar/Ringed Teal© Sergio Cusano



Rain aftermath at the RECS It has been raining for a week now. This phenomenon covered a wide area and flooded several towns, which resulted in over a 10.000 evacuees mainly from the Provincia de Buenos Aires. At the reserve rainfall raised the water level of the pond flooding the sidewalk.

Lluvia/Rainfall11-8-2015 © Sergio Cusano

Lluvia/Rainfall8-8-2015 © J. Simón Tagtachian

See more photos of the rain aftermath and the sidewalk flooded on a previous occasion
Grey-throated Warbling-Finch
Poospiza cabanisi
Monterita litoraleña/Grey-throated Warbling-Finch© Claudia y Diego Bastías


We reuse the photo sent by Diego some days ago to add this warbling-finch's voice recorded by Diego as well
Sharp-billed Canastero
Asthenes pyrrholeuca
Canastero coludo/Sharp-billed Canastero© Pablo Serur

© Claudia y Diego Bastías
To illustrate the Canastero's voice recorded by Diego I chose this old photo
White-tipped Plantcutter
Phytotoma rutila
Cortarramas/White-tipped Plantcutter© Claudia y Diego Bastías
Grey-throated Warbling-Finch
Poospiza cabanisi
Monterita litoraleña/Grey-throated Warbling-Finch© Claudia y Diego Bastías
Greyish Saltator
Saltator coerulescens
Pepitero gris/Greyish Saltator© Claudia y Diego Bastías
Southern Lapwing
Vanellus chilensis
Tero común/Southern Lapwing© Claudia y Diego Bastías
Almost a new mammal species: Humpback whale
Megaptera novaengliae
It certainly passed very near, but we have no record to prove it. Unusual, unexpected this whale surprised everybody. It entered the harbour at the north end, where the Buquebus terminal is, through Grierson Bridge into the Dam 4. where the Marine is. Specialists of different organizations and National Organisms along with Prefectura Naval Argentina monitored the state of the animal and tried to guide it into open waters. Freshwater is not the appropiate environment for this whale and a long stay could put it into risk. Fortuantely they seemed to have done it.

Grierson1 JST 8 15
Simón went to the area. The bridge was full of onlookers anxious to see such a spectacle, but the whale did not turn up.
Grierson JST 8 15
At the entrace of the canal Prefectura personnel can be seen on boats.
Grierson2 JST 8 15
© J. Simón Tagtachian
Lake Duck
Oxyura vittata
Pato zambullidor chico/Lake Duck© J. Simón Tagtachian
White-rumped Swallow
Tachycineta leucorrhoa
Golondrina ceja blanca/White-rumped Swallow

Golondrina ceja blanca/White-rumped Swallow© J. Simón Tagtachian
Seen by Diego Some days ago
Spot-winged Pigeon
Patagioenas maculosa
Paloma manchada/Spot-winged Pigeon© Nicolás Giorgio
Great Grebe
Podiceps major
Macá grande/Great Grebe© Nicolás Giorgio

Macá grande/Great Grebe© J. Simón Tagtachian
Masked Duck
Nomonyx dominicus
Pato fierro/Masked Duck© J. Simón Tagtachian
Coscoroba Swan
Coscoroba coscoroba
coscoroba1 NGG 8 15

coscoroba NGG 8 15© Nicolás Giorgio
Two different nests
Screaming Cowbird
Molothrus rufoaxillaris
Tordo pico corto/Screaming Cowbird© J. Simón Tagtachian
Campo Flicker
Colaptes campestris
Carpintero campestre/Campo Flicker© J. Simón Tagtachian
Three blackbirds
Chestnut-capped Blackbird
Chrysomus ruficapillus
Varillero congo/Chestnut-capped Blackbird© J. Simón Tagtachian
Yellow-winged Blackbird
Agelasticus thilius
Varillero ala amarilla/Yellow-winged Blackbird© J. Simón Tagtachian
Unicoloured Blackbird
Agelasticus cyanopus
Varillero negro/Unicoloured Blackbird© J. Simón Tagtachian
Here three of the blackbirds common in the reserve. Three of them are male. As a bonus the female of the Unicoloured Blackbird. It is the easiest of all three to identify. As soon as the other two show we will see the differences.
Varillero negro/Unicoloured Blackbird© J. Simón Tagtachian
Limpkin
Aramus guarauna
Caraú/Limpkin33" />© J. Simón Tagtachian
Cattle Tyrant
Machetornis rixosa
Picabuey/Cattle Tyrant© J. Simón Tagtachian
Tropical Parula
Setophaga pitiayumi
Pitiayumí/Tropical Parula© J. Simón Tagtachian
Great Pampa Finch
Embernagra platensis
Verdón/Great Pampa Finch© J. Simón Tagtachian