News - February 2015

Two spinetails
Sooty-fronted Spinetail
Synallaxis frontalis
Pijui frente gris/Sooty-fronted Spinetail© Hugo Aguilar


© Dolores Fernández
Spix's Spinetail
Synallaxis spixi
Pijuí plomizo/Spix's Spinetail© Elsa y Guillermo


© Cora Rimoldi
These spinetails are difficult to see. They restlessly move in the bushes which prevent a clear sight of them. With luck they expose for a little while. Their voices will certainly announce their presence. As voices are very different we will know whether it is the Spix's or the Sooty-fronted Spinetail. But if there is no voice one must be careful not to confuse them since they are very similar. The crown is one of the keys to bear in mind. If the rufous colour of the crown also covers the front, it is the Spix's Spinetail. If the front is grey instead, it is the Sooty-fronted as the name indicates.
The photos are for illustrative purposes
Tropical Parula
Setophaga pitiayumi
Pitiayumí/Tropical Parula© J. Simón Tagtachian


© Cora Rimoldi
The photo is for illustrative purposes
Least Grebe
Tachybaptus dominicus
Macá gris/Least Grebe© Eduardo Carreyra
This is in fact the first photo taken of the least grebe. It was the Saturday of the Birding Challenge, that is, one week before. As Eduardo learnt this bird had been seen he rechecked his photos and found it.
Blue-and-yellow Tanager
Pipraeidea bonariensis
NaranjeroM/Blue-and-yellow TanagerM© Ignacio Agudelo
Rufescent Tiger-Heron
Tigrisoma lineatum
Hocó colorado/Rufescent Tiger-Heron© José Alberto Lell
Limpkin - Common Gallinule
Aramus guarauna - Gallinula galeata
Caraú pollona/Limpkin GallinuleThe young Common Gallinule looks with curiosity
© Ignacio Aguledo
Waterfwol Acuáticas/WaterfowlYellow-billed Teal, White-tufted Grebe, Common Gallinule and a young Coot
© Ignacio Aguledo
Wattled Jacana
Jacana jacana
Jacana/Wattled JacanaYoung © Ignacio Agudelo
Brazilian Teal
Amazonetta brasiliensis
Pato cutirí/Brazilian TealPair © Ignacio Agudelo
Bran-coloured Flycatcher
Myiophobus fasciatus
Mosqueta estriada/Bran-coloured Flycatcher© Ignacio Agudelo
Fulvous Whistling-Duck
Dendrocygna viduata
Sirirí colorado/Fulvous Whistling-DuckI found eight © Ignacio Agudelo
Roadside Hawk
Rupornis magnirostris
Taguató común/Roadside Hawk© Sergio Cusano
Yellow-chevroned Parakeet
Brotogeris chiriri
Catita chirirí/Yellow-chevroned Parakeet© Claudia y Diego Bastías
It is very common to see this parrot eat the fruit of
Chorisia speciosa in the reserve. Since these trees have not born fruit yet they eat those of the Syagrus romanzoffiana
Bare-faced Ibis
Phimosus infuscatus
Cuervillo cara pelada/Bare-faced Ibis© Claudia y Diego Bastías
Brown-chested Martin
Progne tapera
Golondrina parda/Brown-chested MartinTwo adults and a fledgeling © J. Simón Tagtachian
Golondrina parda/Brown-chested MartinSecond clutch in this Hornero's nest at the Viamonte Access. A Southern Buckeye outside the nest was delivered by the adults. There were too many of these butterflies during the week.
© Claudia y Diego Bastías
Fork-tailed Flycatcher
Tyrannus savana
Tijereta/Fork-tailed Flycatcher© Claudia y Diego Bastías
White-winged Becard
Pachyramphus polychopterus
Anambé comúnM/White-winged BecardMMuy raro verlo en el pasto © Segio Cusano
Bran-coloured Flycatcher
Myiophobus fasciatus
Mosqueta estriada/Bran-coloured FlycatcherTaken in December 2014 © José Alberto Lell
Rufous-collared Sparrow
Zonotrichia capensis
Chingolo/Rufous-collared Sparrow© Nicolás Giorgio
Hooded Siskin
Sporagra magellanica
Cabecitanegra comúnM/Hooded SiskinM© José Alberto Lell
Double-collared Seedeater
Sporophila caerulescens
Corbatita común/Double-collared Seedeater© Claudia y Diego Bastías

Green-barred Woodpecker
Colaptes melanochloros
28-02-15 © Claudia y Tito Di Mauro
Stories of the reserve
© Claudia y Tito Di Mauro
Least Grebe
Tachybaptus dominicus

© Claudia y Tito Di Mauro This grebe is quite small. It is smaller than the White-tufted Grebe
Rollandia rolland as shown by Claudia y Tito in the video. The yellow eye distinguishes from the other grebes among other things.
This Least Grebe is out of the area of distribution. In Argentina it covers an area in the north part of the country from the mountains to the east and reaches the south to the provinces of Santa Fe, Córdoba and Entre Ríos though not completely.



New bird species: Least Grebe
Tachybaptus dominicus
Macá gris/Least Grebe© Pablo M. Fernández
Macá gris/Least Grebe© Sergio Cusano
Macá gris/Least Grebe© Silvia Loiacono
Discovered by Pablo Fernández everybody had the chance to photograph this new species to the RECS.
Green Kingfisher
Chloroceryle americana
Martín pescador chico H/Green Kingfisher FFemale © Sergio Cusano
Martin pescador chicoH/Green KingfisherFFemale © J. Simón Tagtachian
Diademed Tanager
Stephanophorus diadematus
Frutero azul/Diademed Tanager© Dolores Fernández
Vermilion Flycatcher
Pyrocephalus rubinus
Churrinche/Vermilion Flycatcher© Silvia Loiacono
Summer is coming to an end and the Vermilion Flycatchers fly past the reserve on their way north. Diego Bastías has already seen a male on Wednesday 25th.
Warbling Doradito
Pseudocolopteryx flaviventris
Doradito común/Warbling Doradito© José Alberto Lell
Scarlet-headed Blackbird
Amblyramphus holosericeus
Federal/Scarlet-headed Blackbird© Sergio Cusano
Rosy-billed Pochard
Netta peposaca
Pato picazo/Rosy-billed Pochard© Claudia y Diego Bastías
In this pochard family there are two fulvous whistiling-duck chicks. The Fulvous Whistling-Duck may dump eggs in other birds' nests of its same species or not. This is not the first time we witness this event. There is a previous record of 2010. On that occasion also a Rosy-billed Pochard was seen with a Fulvous Whistling-Duck chick among her ducklings.
Pato picazo/Rosy-billed Pochard© José Luis Merlo

Ringed Teal
Callonetta leucophrys
22-02-15 © Cora Rimoldi

And now the final results of the Birding Challenge. Only one data: 118 bird species registered during the whole event. The winners of all categories and the detail of what was spotted by whom is on ecoregistros.org
And the Birding Challenge took place as planned on February 21st and 22nd. Two days birdwatching .
Very early in the morning when the RECS was not open yet many observers began from the sidewalk. At 8 o'clock sharp the reserve opened and the group entered for the inside walk. Some words in charge of one of the organizers, Jorge La Grotteria, and we left for Canal Viamonte. The dynamics of the group was such that the number of birders increased or decreased according to their needs.
BC BC1
Of course breakfast was a must to charge batteries. The day was beautiful, but it was already getting hot. And lunch could not be skipped either.
BC2 BC3
BC4 BC5
More than 110 bird species observed (heard, photographed and/or seen) during the event. Wednesday is the deadline to hand over the material. So by that time we will know the exact number of species. Anyway follow the provisional results
And now some gems of the event
New bird species: Southern Martin
Progne elegans
Golondrina negra/Southern Martin© J. Simón Tagtachian
Golondrina negra/Southern Martin© Jorge La Grotteria
Difficult to be photographed. Too many times seen, but we had no photographic record on the site
Common Snipe
Gallinago paraguaie
Becasina común/Common Snipe© Elsa y Guillermo
How surprised Guillermo was when he downloaded his photos. He found a Common Snipe hiding behind a group of ducks on an island
Ash-coloured Cuckoo
Coccycua cinerea
Cuclillo chico/Ash-coloured Cuckoo© Elsa y Guillermo
Peregrine Falcon
Falco peregrinus
Halcón peregrino/Peregrine Falcon© J. Simón Tagtachian
Ultramarine Grosbeak
Cyanocompsa brissonii
Reinamora grandeH/Ultramarine GrosbeakF© J. Simón Tagtachian
White-eyed Parakeet
Aratinga leucophtalma
Calancate ala roja/White-eyed Parakeet© J. Simón Tagtachian
Long-winged Harrier
Circus buffoni
Gavilán planeador/Long-winged Harrier© J. Simón Tagtachian
White-banded Mockingbird
Mimus triurus
Calandria real/White-banded Mockingbird© Jorge La Grotteria
Catita chirirí
Brotogeris chiriri
Catita chirirí/Yellow-chevroned Parakeet© Sergio Cusano
Kelp Gull
Larus dominicanus
Gaviota cocinera/Kelp Gull© J. Simón Tagtachian
Gaviota cocinera/Kelp Gull© Sergio Cusano
Brown-hooded Gull
Chroicocephalus maculipennis
Gaviota capucho café/Brown-hooded Gull© J. Simón Tagtachian
Campo Flicker
Colaptes campestris
Carpintero campestre/Campo Flicker© Jorge La Grotteria
European Starling
Sturnus vulgaris
Estornino pinto/European Starling© Jorge La Grotteria
Yellow-winged Blackbird
Agelasticus thilius
Varillero ala amarillaM/Yellow-winged BlackbirdM© Elsa y Guillermo
Cattle Tyrant
Machetornis rixosa
Picabuey/Cattle Tyrant© Jorge La Grotteria
Rosy-billed Pochard
Netta peposaca
Pato picazo/Rosy-billed Pochard© Dolores Fernández
Ringed Teal
Callonetta leucophrys
Pato de collar/Ringed Teal© Dolores Fernández
Creamy-bellied Thrush
Turdus amaurochalinus
Zorzal chalchalero/Creamy-bellied Thrush© Jorge La Grotteria
Red-eyed Vireo
Vireo olivaceus
Chiví común/Red-eyed Vireo© Jorge La Grotteria
Nenday Parakeet
Aratinga nenday
Ñanday/Nenday Parakeet© Jorge La Grotteria



Plants

Dolichandra cynanchoides
Sacha huasca/Dolichandra cynanchoides© Sergio Cusano

Dolichandra cynanchoides
Sacha huasca/Dolichandra cynanchoides© Sergio Cusano
Calico flower
Aristolochia elegans
Aristoloquia/Calico flower© Sergio Cusano
Striped rosemallow
Hibiscus cisplatinus
Rosa del río/Striped rosemallow© Victoria Mansilla
Catclaw mimosa
Mimosa pigra
Carpinchera/Catclaw mimosa© Flor
Catclaw mimosa
Mimosa pigra
Carpinchera/Catclaw mimosa© Flor
Balloon vine
Cardiospermum grandiflorum
Globito cipó/Balloon vine© Sergio Cusano
Pink flowered tweedia
Oxypetalum solanoides
Plumerillo negro/Pink flowered tweedia© Sergio Cusano
Yellow bird of paradise
Caesalpinia gilliesii
Barba de chivo/Yellow bird of paradise© Sergio Cusano
Squash
Cucurbita maxima
Zapallo/Squash© Flor
Buttercup tree
Senna corymbosa
Sen del campo/Buttercup tree© Sergio Cusano

Wedelia glauca
Sunchillo/Wedelia glauca© Sergio Cusano
Giant arrowhead
Sagittaria montevidensis
Sagitaria/Giant arrowhead© Sergio Cusano
Spanish dagger
Yucca gloriosa
Yuca/Spanish dagger© Flor
Two new moths to the website

Macaria sp
Macaria sp© Gustavo Brahamian
Ezequiel tells us that the moth on top is a Macaria belonging into the family Geometridae. The one below belongs into the family Crambidae and seems to be predated upon by a spider or a bug judging by its posture.
Flia Crambidae
© Sergio Cusano
Butterflies of February
White-patched Duskywing
Chiomara autander autander
Emparchada/White-patched Duskywing© Sergio Cusano
Snout
Libytheana carinenta
Picuda/Snout© Sergio Cusano
Poltys Satyr
Parypthimoides poltys
Ocelada doble línea/Poltys Satyr© Victoria Mansilla
Poltys Satyr
Parypthimoides poltys
Ocelada doble línea/Poltys Satyr© Victoria Mansilla
Ithra Crescent
Ortilia ithra
Bataraza/Ithra Crescent© Gustavo F. Brahamian
Ithra Crescent
Ortilia ithra
Bataraza/Ithra Crescent© Sergio Cusano
Fiery Skipper
Hylephila phileus
Saltarina amarilla/Fiery Skipper© Gustavo F. Brahamian
Celmis Satyr
Ypthimoides celmis
Marrón del pastizal/Celmis Satyr© Sergio Cusano
Chilean Lady
Vanessa carye
Dama manchada/Chilean Lady© Sergio Cusano
Southamerican Lady
Vanessa braziliensis
Dama pintada/Southamerican Lady © Sergio Cusano
Eurytulus Scrub-Hairstreak
Strymon Eurytulus
Frotadora común/Eurytulus Scrub-Hairstreak© Sergio Cusano
Lesbia Sulphur
Colias lesbia
Isoca de la alfalfa/Lesbia Sulphur© Sergio Cusano
Claudina Crescent -Common Yellow
Tegosa claudina/Eurema deva
Claudina Limoncito/C. Crescent Common Yellow© Victoria Mansilla
Monarch
Danaus erippus
Monarca/Monarch© Gustavo F. Brahamian
Gulf Fritillary
Agraulis vanillae maculosa
Espejitos/Gulf Fritillary© Flor
Gulf Fritillary
Agraulis vanillae maculosa
Espejitos/Gulf Fritillary© Sergio Cusano
Mexican Silverspot
Dione moneta
Moneta/Mexican Silverspot© Sergio Cusano
Mexican Silverspot
Dione moneta
Moneta/Mexican Silverspot© Sergio Cusano
Southern Buckeye
Junonia genoveva hilaris
Cuatro ojos común/Southern Buckeye© Amelia Besana
Southern Buckeye
Junonia genoveva hilaris
Cuatro ojos común/Southern Buckeye© Sergio Cusano
Campo Flicker
Colaptes campestris
Carpintero campestreM/Campo FlickerM© Nicolás Giorgio
Wattled Jacana
Jacana jacana
Jacana/Wattled Jacana© José Alberto Lell

Jacana/Wattled Jacana© Nicolás Giorgio

Jacana/Wattled Jacana© Sergio Cusano
Brown-chested Martin
Progne tapera
Golondrina parda/Brown-chested Martin

Golondrina parda/Brown-chested Martin

Golondrina parda/Brown-chested MartinGathering at the antenna ready to begin their journey back
© Gustavo F. Brahamian
Striated Heron
Butorides striata
Garcita azuladaJ/Striated HeronJJoven © Sergio Cusano
Eared dove
Zenaida auriculata
Torcaza comúnJ/Eared doveJJuvenile © Sergio Cusano
House Sparrow
Passer domesticus
Gorrión/House Sparrow© Sergio Cusano
Harris's Hawk
Parabuteo unicinctus
Gavilán mixtoJ/Harris's HawkJYoung © Sergio Cusano
Hooded Siskin
Sporagra magellanica
Cabecitanegra común H/Hooded Siskin F© Sergio Cusano

Rufescent Tiger-Heron
Tigrisoma lineatum
20-02-15 © Nicolás Giorgio
Southern Lapwing
Vanellus chilensis
Tero común/Southern LapwingFive lapwings © Nicolás Giorgio
Two very important records of 2014
White-naped Xenopsaris
Xenopsaris albinucha
Tijerilla/White-naped XenopsarisTaken in November 2014. The last record was in January 2000
© Marcelo Castro
Rufous-browed Peppershrike
Cyclarhis gujanensis
Juan Chiviro/Rufous-browed PeppershrikeTaken in June 2014. The rufous-browed Peppershrike used to appear more frequently, but rarely seen since 2008
© Marcelo Castro
White-banded Mockingbird
Mimus triurus
Calandria real/White-banded MockingbirdFebreuary 7th. A bird expected to be seen in winter © Diego Carús
Calandria real/White-banded MockingbirdFebruary 19th. © Sergio Cusano
Long-winged Harrier
Circus buffoni
Gavilán planeador/Long-winged Harrier Gavilán planeador/Long-winged Harrier© J. Simón Tagtachian
Masked Duck
Nomonyx dominicus
Pato fierro/Masked Duck

fierro3 JST 2 15Chicks keep growing
© J. Simón Tagtachian
Green-winged Saltator
Saltator caerulescens
Pepitero verdoso/Green-winged Saltator© J. Simón Tagtachian
Masked Yellowthroat
Geothlypis aequinoctialis
arañero c n H JST 2 15Female © J. Simón Tagtachian
Common Gallinule
Gallinula galeata
Pollona negra/Common Gallinule

Pollona negra/Common Gallinule

Pollona negra/Common Gallinule© J. Simón Tagtachian
White-winged Becard
Pachyramphus polychopterus
Anambé común/White-winged BecardA chick being fed by an adult
© Dolores Fernández
Blue-and-white Swallow
Pygochelidon cyanolecua
Golondrina barranquera/Blue-and-white Swallow© J. Simón Tagtachian
White-crested Tyrannulet
Serpophaga subcristata
Piojito común/White-crested Tyrannulet

Piojito común/White-crested Tyrannulet© J. Simón Tagtachian
Neotropic Cormorant
Phalacrocorax brasilianus
Biguá/Neotropic Cormorant© Dolores Fernández
European Starling
Sturnus vulgaris
Estornino pinto/European Starling© Amelia Besana
Rufous-bellied Thrush
Turdus rufiventris
Zorzal colorado/Rufous-bellied Thrush© J. Simón Tagtachian



Warbling Doradito
Pseudocolpoteryx flaviventris
Doradito común/Warbling Doradito© Sergio Cusano
White-tufted Grebe
Rollandia rolland
Macá común/White-tufted Grebe© Sergio Cusano
Glittering-bellied Emerald
Chlorostilbon lucidus
Picaflor común/Glittering-bellied EmeraldMale © Sergio Cusano
Unicoloured Blackbird
Agelasticus cyanopus
Varillero negro/Unicoloured Blackbird

Varillero negro/Unicoloured BlackbirdHembra © Nicolás Giorgio
Scrub Blackbird
Dives warszewiczi
Tordo de matorral/Scrub Blackbird© Nicolás Giorgio
Cattle Tyrant
Machetornis rixosa
Picabuey/Cattle Tyrant© Elsa y Guillermo
White-lined Tanager
Tachyphonus rufus
Frutero negroM/White-lined Tanager MMale © Elsa y Guillermo
Snowy Egret
Egretta thula
Garcita blanca/Snowy Egret© Nicolás Giorgio
Sayaca Tanager
Thraupis sayaca
Celestino/Sayaca Tanager© J. Simón Tagtachian
Grey-breasted Martin
Progne chalybea
Golondrina doméstica/Grey-breasted Martin© Gustavo F. Brahamian
Fork-tailed Flycatcher
Tyrannus savana
Tijereta/Fork-tailed Flycatcher© Gustavo F. Brahamian
Fork-tailed Flycatcher-Brown-chested Martin
Tyrannus savana-Progne tapera
Tijereta G.Parda/Flycatcher G-b Martin Tijereta G.Parda/Flycatcher G-b MartinTalking on the wing
© Gustavo F. Brahamian
White-winged Becard
Pachyramphus polychopterus
Anambé comúnH/White-winged BecardFFemale© J. Simón Tagtachian
Monk Parakeet
Myiopsitta monachus
Cotorra/Monk Parakeet

Cotorra/Monk Parakeet© Elsa y Guillermo
Black-necked Stilt
Himantopus mexicanus
Tero real/Black-necked Stilt© Nicolás Giorgio
Scarlet-headed Blackbird
Amblyramphus holosericeus
Federal J/Scarlet-headed BlackbirdJJuvenile © Elsa y Guillermo
Domestic Duck
Cairina moschata domestica
Pato criollo/Domestic Duck© Nicolás Giorgio
Neotropical Waterbird Census at RECS
On Saturday 7th the count of waterbirds was carried out. This event is organized by Wetlands International and coordinated by Aves Argentinas in our country.
As expected most waterbirds were registered early in the morning along the Coypu Pond. The Black-necked Stilt and the Roseate Spoonbills were the outstanding ones.

Red Bug
Dysdercus albofasciatus
Red Bug
07-02-15 © Dolores Fernández
This colourful bug controls Pavonia sepium, the yellow flower in the picture. This mallow is native and invasive due to the great number of spiky seeds which attach to whatever passes near and may be dispersed far away. This bug feeds almost exclusively on the ovules, if the flower has not been fertilized yet, or the seeds. By controlling these two factors the plant is not that invasive. Being its primary food this bug is found where there is Pavonia sepium. In this case male and female are mating.
Black-headed Duck
Heteronetta atricapilla
Pato cabeza negra H/Black-headed Duck F © Sergio Cusano
Rufous Hornero
Furnairus rufus
Hornero/Rufous Hornero © Sergio Cusano
Rosy-billed Pochard
Netta peposaca
Pato picazo/Rosy-billed Pochard© Sergio Cusano
Fulvous Whistling-Duck
Dendrocygna bicolor
Sirirí colorado/Fulvous Whistling-Duck © Claudia y Diego Bastías
Wattled Jacana
Jacana jacana
Jacana/Wattled Jacana © J. Simón Tagtachian
Unicoloured Blackbird
Agelasticus cyanopus
Varillero negro MJ/Unicoloured Blackbird JMJuvenile male © Sergio Cusano
Creamy-bellied Thrush
Turdus amaurochalinus
Zorzal chalchaleroJ/Creamy-bellied Thrush JJuvenile © Sergio Cusano
Domestic Duck
Cairina moschata domestica
Pato criollo/Domestic Duck © Sergio Cusano
Southern Lapwing
Vanellus chilensis
Tero común/Southern Lapwing© Sergio Cusano
Brazilian Teal
Amazonetta brasiliensis
Pato cutiríM/Brazilian TealM© J. Simón Tagtachian Pato cutiríM/Brazilian TealM© J. Simón Tagtachian
Guira Cuckoo
Guira guira
Pirincho/Guira Cuckoo© Sergio Cusano
Black-capped Warbling-Finch
Poospiza melanoleuca
Monterita cabeza negra/Black-capped Warbling-Finch © Sergio Cusano
Picui Ground Dove
Columbina picui
Torcacita común/Picui Ground DoveHabía diez individuos
© Sergio Cusano
Nenday ParakeetÑanday
Aratinga nenday
Ñanday/Nenday Parakeet© Sergio Cusano