News - March 2015


Ultramarine Grosbeak
Cyanoloxia brissonii
Ultramarine Grosbeak
29-03-15 © Victoria Mansilla

Chenopodium
Chenopodium ambrosioides
Paico/Chenopodium© Silvia Loiacono
This native plant was used as an anthelmintic, that is to control internal parasites in humans. Its careless use caused too many intoxications that its sale has been prohibited.
It has a strong odour when it turns brown and leaves are rubbed.
Mirlinton
Sechium edule
Para del aire/Mirlinton© Victoria Mansilla
It belongs in the Cucurbits. It is a climbing plant with big leaves. There is one specimen on the right hand at the beginning of the Viamonte Canal. It is easy to spot due to its fruits which are big and spiny. As they mature they turn whitish. Both the fruit and the root are used as human food.

Dolychandra cynanchoides
Sacha huasca/Dolichandra cynanchoides© Flor
Smooth beggartick
Bidens laevis
Bidens laevis/Smooth beggartick© Sergio Cusano
Longflower evening primrose
Oenothera affinis
Flor de la oración/Longflower evening primrose© Sergio Cusano
Striped Rosemallow
Hibiscus cisplatinus
Rosa de río/Striped Rosemallow© Victoria Mansilla

Green-barred Woodpecker
Colaptes melanochloros
Green-barred Woodpecker
28-03-15 © Sebastián Perrone

Sebastián showed us this woodpecker taking its head out of a hole and its tail out of another. Two nests which somehow ended up connected internally. In the photo the distance seemed too long te be one woodpecker. He took us to the place and though the woodpecker was no longer there we checked the distance was not such. In fact it was only an effect.

Green Kingfisher
Chloroceryle americana
Green Kingfisher
28-03-15 © Sebastián Perrone

One of the four kingfishers spotted that day

Guira Cuckoo
Guira guira
Guira Cuckoo
28-03-15 © Sebastián Perrone
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
28-03-15 © Sebastián Perrone



Unicolored Blackbird
Agelasticus cyanopus
Unicolored Blackbird
29-03-15 © Carlos González Ledo
Unicolored Blackbird
29-03-15 © Carlos González Ledo
Unicolored Blackbird
27-03-15 © J. Simón Tagtachian
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
29-03-15 © Carlos González Ledo

The interesting thing is that there is fish in the pond

Coscoroba Swan
Coscoroba coscoroba
Coscoroba Swan
29-03-15 © Carlos González Ledo

Snail going down the neck


Silver argiope
Argiope argentata
Silver argiope
27-03-15 © Sergio Cusano
Silver argiope
27-03-15 © Sergio Cusano
It belongs into the family Araneidae. This spider is not considered dangerous. Though in kids, weak or allergic people there may be complications. In the photo above we can see some threads are thicker forming a zig zag pattern. These decorations are called stabilimentum (stabilimenta in plural) and its function is a subject of debate.

Cucurbit beetle
Diabrotica speciosa
Cucurbit beetle
28-03-15 © Flor A Modeo
Cucurbit beetle
28-03-15 © Flor A Modeo
This beetle belongs into the family Chrysomelidae. It is considered a pest. It feeds on vegetable leaves and flowers reducing the production of fruits. In the photo below the beetle is eating a Moonflower Ipomoea alba. It seems to be savouring an anther. Its larvae feed on roots.

Camuati Wasp
Polybia scutellaris
Camuati Wasp
28-03-15 © J. Simón Tagtachian
Camuati Wasp
28-03-15 © J. Simón Tagtachian
More butterflies in March
Lantana Scrub-Hairstreak
Strymon bazochiiFrotadora enana/Lantana Scrub-Hairstreak© Victoria Mansilla
Lantana Scrub-Hairstreak
Strymon bazochii
Frotadora enana/Lantana Scrub-Hairstreak© Victoria Mansilla
Southern Fritillary
Euptoieta hortensia
Hortensia/Southern Fritillary© Sergio Cusano
Southern Fritillary
Euptoieta hortensia
Hortensia/Southern Fritillary© Sergio Cusano
American White Skipper
Heliopyrgus americanus bellatrix
Ajedrezada de lunar/American White Skipper© Flor
American White Skipper
Heliopyrgus americanus bellatrix
Ajedrezada de lunar/American White Skipper© Flor
Argentine Checkered Skipper
Pyrgus orcynoides
Ajdrezada menorArgentine Checkered Skipper© Nicolás Giorgio
Argentine Checkered Skipper
Pyrgus orcynoides
Ajdrezada menorArgentine Checkered Skipper© Flor
Cassius blue
Leptotes cassius
Yuyera/Cassius blue© Sergio Cusano
Arawacus ellida
Arawacus ellida
Élida/Arawacus ellida© Victoria Mansilla

Atteva pustulella
Atteva pustulella© Flor

Melanchroia aterea
Melanchroia aterea© Victoria Mansilla
Polydamas Swallowtail
Polydamas battus
Borde de oro/Polydamas Swallowtail© J. Simón Tagtachian
Lyssipoides Metalmark
Riodina lyssipoides
Danzarina chica/Lyssipoides Metalmark© Victoria Mansilla
Eurytulus Scrub-Hairstreak
Strymon eurytulus
Frotadora común/Eurytulus Scrub-Hairstreak© Victoria Mansilla
Dichrous Skipper
Theagenes dichrous
Falcada ribereña/Dichrous Skipper© Sergio Cusano
Eufala Skipper
Lerodea eufala
Medialuna común/Eufala Skipper© Victoria Mansilla
Lesbia Sulphur
Colias lesbia
Isoca de la alfalfa/Lesbia Sulphur© Sergio Cusano
Mexican Silverspot
Dione moneta
Moneta/Mexican Silverspot© Sergio Cusano
Mexican Silverspot
Dione moneta
Moneta/Mexican Silverspot© Victoria Mansilla
Gulf Fritillary
Agraulis vanillae maculosa
Espejitos/Gulf Fritillary© Diego Carús
Gulf Fritillary
Agraulis vanillae maculosa
Espejitos/Gulf Fritillary© Gustavo F. Brahamian
Fiery Skipper
Hylephila phyleus
Saltarina amarilla/Fiery Skipper© Victoria Mansilla
Chilean Lady
Vanessa carye
Dama manchada/Chilean Lady© Sergio Cusano
Claudina Crescent
Tegosa claudina
Claudina/Claudina Crescent© Nicolás Giorgio
Monarch
Danaus erippus
Monarca/Monarch© Sergio Cusano
Diego observed a female White-tipped Plantcutter near the Viamonte Cabin. The first winter bird to arrive

Stripe-backed Bittern
Ixobrychus involucris
Stripe-backed Bittern
03-03-15 © Walter Liriel Umpierrez
Green Kingfisher
Chloroceryle americana
Green Kingfisher
28-03-15 © J. Simón Tagtachian

When this male was photographed there were three two other males and just in front of us a female. A total of 4 individuals

Snail Kite
Rostrhamus sociabilis
Snail Kite
27-03-15 © J. Simón Tagtachian
Snail Kite
27-03-15 © J. Simón Tagtachian
Red-eyed Vireo
Vireo olivaceus
Red-eyed Vireo
28-03-15 © J. Simón Tagtachian
White-faced Whistling-Duck
Dendrocygna viduata
White-faced Whistling-Duck
27-03-15 © J. Simón Tagtachian

A flock of 138 individuals

Golden-crowned Warbler
Basileuterus culicivorus
Golden-crowned Warbler
27-03-15 © J. Simón Tagtachian
Silver Teal
Anas versicolor
Silver Teal
27-03-15 © Gustavo F. Brahamian

Showing the speculum all silver teals except for the first on the left, a Brazilian teal

Gilded Hummingbird
Hylocharis chrysura
Gilded Hummingbird
28-03-15 © J. Simón Tagtachian

At silk floss tree Chorisia speciosa

Cinnamon Teal
Anas cyanoptera
Cinnamon Teal
24-03-15 © Carlos González Ledo
White-lined Tanager
Tachyphonus rufus
White-lined Tanager
23-03-15 © J. Simón Tagtachian
White-lined Tanager
Tachyphonus rufus
White-lined Tanager
23-03-15 © J. Simón Tagtachian
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
28-03-15 © Gustavo F. Brahamian

There are 50 already

Green-winged Saltator
Saltator similis
Green-winged Saltator
08-03-15 © Carlos González Ledo
Bat Murciélago/Bat© J. Simón Tagtachian
No further information than shown by the photo. Simón says that there were three individuals flying.

Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
27-03-15 © Sergio Cusano
Ringed Teal
Callonetta leucophrys
Ringed Teal
27-03-15 © Sergio Cusano
Rosy-billed Pochard
Netta peposaca
Rosy-billed Pochard
24-03-15 © Carlos González Ledo
A new pochard family and another one with grown ducklings
Rosy-billed Pochard
25-03-15 © J. Simón Tagtachian
Southern Lapwing
Vanellus chilensis
Southern Lapwing
27-03-15 © Sergio Cusano
Tropical Kingbird
Tyrannus melancholicus
Tropical Kingbird
23-03-15 © J. Simón Tagtachian
Brown-chested Martin
Progne tapera
Brown-chested Martin
27-03-15 © Claudia y Diego Bastías
Plumbeous Rail
Pardirallus sanguinolentus
Plumbeous Rail
25-03-15 © Nicolás Giorgio

Limpkin
Aramus guarauna
Limpkin
25-03-15 © Nicolás Giorgio
Limpkin
25-03-15 © Nicolás Giorgio
Limpkin
25-03-15 © Nicolás Giorgio
Limpkin
25-03-15 © Nicolás Giorgio

Though we have not seen them nesting this is not the first limpkin family we find in the reserve since water and apple snails are back. This chicks are very small and at the end of the video four can be counted. To feed them is a very patient task. Limpkins do not just provide them food to the chicks. They must teach them how to extract the snail out of the shell. And that is quite a technique to learn.

24-03-15 © Claudia y Tito Di Mauro

Striated Heron
Butorides striata
25-03-15 © Claudia y Tito Di Mauro
See the Comparative chart of the 10 surveys organized by the CoaRecs

Green Kingfisher
Chloroceryle americana
Green Kingfisher
24-03-15 © Diego Carús
Green Kingfisher
24-03-15 © Diego Carús
Ultramarine Grosbeak
Cyanoloxia brissonii
Ultramarine Grosbeak
23-03-15 © Federico Andrés De Maio
Limpkin
Aramus guarauna
Limpkin
24-03-15 © Diego Carús
Limpkin
23-03-15 © Nicolás Giorgio

Yellow-billed Pintail
Anas georgica
Yellow-billed Pintail
23-03-15 © Nicolás Giorgio

Two ducks which make beginners doubt. Since they are together, let's see the differences in head and neck.
Yellow-billed Teal has all its head dark brown. Short and robust neck. The eye is crossed by a black line which resembles a slanted eye.
Yellow-billed Pintail has reddish cinnamon crown and face and neck whitish. Slimmer and longer neck.


Waterbirds
Wattled Jacana
24-03-15 © Diego Carús

Adult and juvenile wattled jacanas, a limpkin on the right and a pied-billed grebe and a white-tufted grebe

Rosy-billed Pochard
24-03-15 © Diego Carús

Rosy-billed pochards in the water, wattled jacanas on the vegetation. Also pied-billed grebe and white-tufted grebe


White-faced Whistling-Duck
Dendrocygna viduata
White-faced Whistling-Duck
24-03-15 © Diego Carús
Eared Dove
Zenaida auriculata
Eared Dove
24-03-15 © Diego Carús

A very rare juvenile. Though it has a swollen neck it moved without difficulties

Spectacled Tyrant
Hymenops perspicillatus
Spectacled Tyrant
24-03-15 © Diego Carús
Harris's Hawk
Parabuteo unicinctus
Harris's Hawk
24-03-15 © Diego Carús
Wren-like Rushbird
Phleocryptes melanops
Wren-like Rushbird
24-03-15 © Diego Carús
Guira Cuckoo
Guira guira
Guira Cuckoo
24-03-15 © Diego Carús
Least Grebe
Tachybaptus dominicus
Least Grebe
24-03-15 © Diego Carús
24-03-15 © Claudia y Diego Bastías



Bird Survey organized by the CoaRecs - March 21st, 2015 On Saturday 21st the Bird Survey was carried out as programmed. By noon the count reached 112 species and still the afternoon ahead to find some other surprise. The stars were no doubt the South American Painted-Snipe, which had been absent for more than a yera, the Red-Shoveler and the Yellow-billed Teal. First photos on the air and the final results of the Bird Survey

South American Painted-snipe
Nycticryphes semicollaris
South American Painted-snipe
21-03-15 © Claudia y Tito Di Mauro
South American Painted-snipe
21-03-15 © Sergio Cusano
South American Painted-snipe
21-03-15 © J. Simón Tagtachian
23-03-15 © Cora Rimoldi

A South American Painted Snipe eating at the nursery during the bird survey

Yellow-billed Pintail
Anas georgica
Yellow-billed Pintail
21-03-15 © Sergio Cusano
Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
21-03-15 © Sergio Cusano
Coscoroba Swan
Coscoroba coscoroba
Coscoroba Swan
21-03-15 © Sergio Cusano
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
21-03-15 © Sergio Cusano

At least two flocks of 15-20 individuals each were seen

Snowy Egret
Egretta thula
Snowy Egret
21-03-15 © Sergio Cusano
Great Pampa-Finch
Embernagra platensis
Great Pampa-Finch
21-03-15 © Sergio Cusano
Barn Swallow
Hirundo rustica
Barn Swallow
21-03-15 © J. Simón Tagtachian
Barn Swallow
21-03-15 © J. Simón Tagtachian
Green Kingfisher
Chloroceryle americana
Green Kingfisher
21-03-15 © J. Simón Tagtachian
Long-winged Harrier
Circus buffoni
Long-winged Harrier
21-03-15 © J. Simón Tagtachian

Dark morph

Cattle Egret
Bubulcus ibis
Cattle Egret
21-03-15 © J. Simón Tagtachian

A flock of more than 50 individuals

Bare-faced Ibis
Phimosus infuscatus
Bare-faced Ibis
21-03-15 © J. Simón Tagtachian
Least Grebe
Tachybaptus dominicus
Least Grebe
21-03-15 © J. Simón Tagtachian
Least Grebe
21-03-15 © J. Simón Tagtachian

With white-tufted grebe


Diego observed a male Red Shoveler resting on an islet at Coypu. Let us find it on the Bird survey Day to add it to the list.

Yellow-billed Pintail
Anas georgica
20-03-15 © Claudia y Diego Bastías

Masked Duck
Nomonyx dominicus
Masked Duck
20-03-15 © Victoria Mansilla
Snowy Egret
Egretta thula
Snowy Egret
20-03-15 © Claudia y Diego Bastías

More and more waterbirds are found at the Coypu Pond. this is an indication that the food chain is recovering

White-faced Whistling-Duck
Dendrocygna viduata
White-faced Whistling-Duck
15-03-15 © Victoria Mansilla

With yellow-billed teal, rosy-billed pochard and coscoroba swan

Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
20-03-15 © Victoria Mansilla
Tropical Parula
Setophaga pitiayumi
Tropical Parula
20-03-15 © Victoria Mansilla
Pied-billed Grebe
Podilymbus podiceps
Pied-billed Grebe
19-03-15 © Claudia y Diego Bastías
Ringed Teal
Callonetta leucophrys
Ringed Teal
17-03-15 © Claudia y Diego Bastías
Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
20-03-15 © Victoria Mansilla
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
20-03-15 © Victoria Mansilla
Hooded Siskin
Spinus magellanicus
Hooded Siskin
20-03-15 © Victoria Mansilla
Great Kiskadee
Pitangus sulphuratus
Great Kiskadee
20-03-15 © Victoria Mansilla
Yellow-billed Pintail
Anas georgica
Yellow-billed Pintail
17-03-15 © Claudia y Diego Bastías

And the yellow-billed pintails are back, too. A very common duck at the reserve and almost last to arrive now that the pond is with water. There is another absentee the cinnamon teal. On the left a silver teal

Yellow-billed Pintail
17-03-15 © Claudia y Diego Bastías

A yellow-billed pintail with a pair of yellow-billed teals, two species that lead to confusion

Small-billed Elaenia
Elaenia parvirostris
Small-billed Elaenia
17-03-15 © Claudia y Diego Bastías
Bare-faced Ibis
Phimosus infuscatus
Bare-faced Ibis
05-03-15 © Nicolás Giorgio

Spectacled Tyrant
Hymenops perspicillatus
Spectacled Tyrant
17-03-15 © José Alberto Lell
Narrow-billed Woodcreeper
Lepidocolaptes angustirostris
Narrow-billed Woodcreeper
17-03-15 © José Alberto Lell
Least Grebe
Tachybaptus dominicus
Least Grebe
15-03-15 © J. Simón Tagtachian
Least Grebe
20-03-15 © Victoria Mansilla
Cinnamon Teal
Anas cyanoptera
Cinnamon Teal
15-03-15 © J. Simón Tagtachian
Green Kingfisher
Chloroceryle americana
Green Kingfisher
15-03-15 © J. Simón Tagtachian
Tropical Kingbird
Tyrannus melancholicus
Tropical Kingbird
13-03-15 © Sergio Cusano
Maguari Stork
Ciconia maguari
Maguari Stork
15-03-15 © J. Simón Tagtachian
Variable Oriole
Icterus pyrrhopterus
Variable Oriole
13-03-15 © Sergio Cusano
Striated Heron
Butorides striata
Striated Heron
11-03-15 © Claudia y Diego Bastías

Feeding on dragonflies

Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
11-03-15 © Claudia y Diego Bastías

It is missing a leg

Limpkin
Aramus guarauna
Limpkin
11-03-15 © Claudia y Diego Bastías

Diego saw this individual sitting for two days on a row. It seems to be ok and feeding well.

Yellow-billed Cardinal
Paroaria capitata
Yellow-billed Cardinal
13-03-15 © Sergio Cusano
Brown-chested Martin
Progne tapera
Brown-chested Martin
08-03-15 © Victoria Mansilla
Brown-chested Martin
10-03-15 © Claudia y Diego Bastías

New turtle species: Common snapping Turtle
Chelydra serpentina
Tortuga mordedora/Common snapping turtle© Diego Carús
Diego and Leonel discovered this turtle in the reserve .They suspected this could be a common snapping turtle. Unluckily their suspicions were right. This turtle is exotic. It is from the United States and is a real threat. It is very voracious and dangerous. One must be very careful when manipulating it since it moves its neck sideways very quickly and can cause serious bites. Claudio Bertonatti, former Operational Manager of the reserve and current consultant at the Felix de Azara Foundation , notified the authorities warning about the threat this turtle represents to the fauna. Walter Prado, of the herpetologists consulted to identify the turtle, wrote a complete article of this turtle (only in Spanish)

Parasitism: Rosy-billed pochard - Fulvous whistling-duck
Rosy-billed Pochard
09-03-15 © Claudia y Diego Bastías

Another pochard family parasitized by fulvous whistling-duck

Rosy-billed Pochard
08-03-15 © Diego Carús

Ducklings of rosy-billed pochard and fulvous whistling-duck


Butterflies of March
(The last five correspond to February)
Polydamas Swallowtail
Polydamas battus
Borde de oro/Polydamas Swallowtail© Victoria Mansilla
Polydamas Swallowtail
Polydamas battus
Borde de oro/Polydamas Swallowtail© Victoria Mansilla
Poltys Satyr
Parypthimoides poltys
Ocelada doble línea/Poltys Satyr© Victoria Mansilla
Celmis Satyr
Ypthimoides celmis
Marrón del pastizal/Celmis Satyr© Victoria Mansilla
Southern Buckeye
Hylephila phileus
Saltarina amarilla/Fiery Skipper© Victoria Mansilla
Southern Buckeye
Junonia genoveva hilaris
Cuatro ojos común/Southern Buckeye© Victoria Mansilla
Bella Mapwing
Hypanarthia bella
Bellísima común/Bella Mapwing© Victoria Mansilla
Bella Mapwing
Hypanarthia bella
Bellísima común/Bella Mapwing© Victoria Mansilla
Common Yellow
Eurema deva
Limoncito común/Common Yellow© Victoria Mansilla
Funeral Duskywing
Erynnis funeralis
Enlutada de blanco/Funeral Duskywing© Victoria Mansilla
Argentine Checkered Skipper
Pyrgus orcynoides
Ajedrezada menor/Argentine Checkered Skipper© Dolores Fernández
Fiery Skipper
Hylephila phileus
Saltarina amarilla/Fiery Skipper© Amelia Besana
Eufala Skipper
Leodea eufala
Medialuna común/Eufala Skipper© Sergio Cusano
Common Lazy
Actinote pellenea
Perezosa común/Actinote pellenea© Sergio Cusano

Least Grebe
Tachybaptus dominicus
Least Grebe
07-03-15 © Silvia Loiacono
Cinnamon Teal
Anas cyanoptera
Cinnamon Teal
07-03-15 © Sergio Cusano
Cinnamon Teal
07-03-15 © Elsa y Guillermo Marcaida
American Kestrel
Falco sparverius
American Kestrel
07-03-15 © Sergio Cusano
American Kestrel
07-03-15 © J. Simón Tagtachian
Coscoroba Swan
Coscoroba coscoroba
Coscoroba Swan
07-03-15 © Sergio Cusano
Snail Kite
Rostrhamus sociabilis
Snail Kite
07-03-15 © J. Simón Tagtachian
Blue-and-white Swallow
Pygochelidon cyanoleuca
Blue-and-white Swallow
07-03-15 © J. Simón Tagtachian
Masked Duck
Nomonyx dominicus
Masked Duck
08-03-15 © Diego Carús
Fulvous Whistling-Duck
Dendrocygna bicolor
Fulvous Whistling-Duck
07-03-15 © J. Simón Tagtachian
Striated Heron
Butorides striata
Striated Heron
08-03-15 © Diego Carús
Picui Ground Dove
Columbina picui
Picui Ground Dove
07-03-15 © Sergio Cusano

Creole Duck
Caririna moschata domestica
Pato criollo/Creole Duck© Sergio cusano



White-faced Whistling-Duck
Dendrocygna viduata
White-faced Whistling-Duck
08-03-15 © Diego Carús

Some more fauna
Black-and-white Tegu Lizard
Salvator merianae
Lagarto overo/Black-and-white Tegu Lizard© Amelia Besana
Andrés Sehinkman tells us that the dark colouring is just an individual variation
Creole frog
Leptodactylus latrans
Rana criolla/Creole frog© Dolores Fernández
Juvenil
Coastal House Snake
Thamnodynastes strigatus
Culebra ocrácea/Coastal House Snake© Claudia y Tito Di Mauro
Brazilian Guinea Pig
Cavia aperea
Cuis/Brazilian Guinea Pig© Ignacio Aguledo