News - April 2015
Polydamas swallowtail
Battus polydamas polydamas
25-04-15 © Dolores Fernández
American Kestrel
Falco sparverius
30-04-15 © Claudia y Diego Bastías
Buff-winged Cinclodes
Cinclodes fuscus
30-04-15 © Claudia y Diego Bastías
| On the last day of April Diego Bastías, Walter and Manuel saw a male Red-crested Finch Coryphospingus cucullatus, a female Hepatic Tanager Piranga flava and a Chotoy Spinetail Schoeniophylax phryganophilus |
Yellow-browed Tyrant
Satrapa icterophrys
18-04-15 © Mario Martín Chimento
Limpkin
Aramus guarauna
16-04-15 © José Alberto Lell
Cocoi Heron
Ardea cocoi
25-04-15 © Mario Martín Chimento
Blue-and-yellow Tanager
Pipraeidea bonariensis
18-04-15 © Mario Martín Chimento
With bugweed fruit
Chimango Caracara
Milvago chimango
18-04-15 © Mario Martín Chimento
Spot-flanked Gallinule
Gallinula melanops
28-04-15 © Claudia y Diego Bastías
Nenday Parakeet
Aratinga nenday
27-04-15 © Claudia y Diego Bastías
Foraging on the lawn
Checkered Woodpecker
Veniliornis mixtus
18-04-15 © Mario Martín Chimento
Red-crested Cardinal
Paroaria coronata
25-04-15 © Mario Martín Chimento
White-striped longtail
Chiodes catillus
22-04-15 © Claudia y Diego Bastías
Polydamas swallowtail
Battus polydamas polydamas
21-04-15 © Hugo Aguilar
Common white-milk
Tatochila autodice
21-04-15 © Hugo Aguilar
25-04-15 © Dolores Fernández
Juno
Dione juno juno
25-04-15 © Ezequiel Núñez Bustos
25-04-15 © Mario Martín Chimento
Southern fritillary
Euptoieta hortensia
21-04-15 © Hugo Aguilar
Common Lazy
Actinote pellenea
09-04-15 © Hugo Aguilar
Tiger moth
Rhynchopyga meisteri
21-03-15 © Victoria Mansilla
Velvetbean moth
Anticarsia gemmatalis
18-04-15 © Sergio Cusano
Sapium haematospermum  © Sergio CusanoThese protuberances are common on Sapium haematospermum's leaves. They are called galls and are originated by a homopteran. These structures present tissue enlargement and they are hollow. The insect lays eggs and the larvae develop in the inside using the structure as a shelter. In the photo some of the galls appear isolated and the leaf is barely modified. But when there are too many the leaf is twisted and deformed. They are green at the beginning and then turn reddish or red. Let's not confuse them with the fruit of this tree which are also look like red "small balls" CR |
| Some flowers and fruits | |
| Wild Pea Vigna adenantha  © Sergio Cusano |
Red wing Heteropteris angustifolia  © Sergio Cusano |
| Balloon vine Cardiospermum grandiflorum  © Sergio Cusano |
Balloon vine Cardiospermum grandiflorum  © Sergio Cusano |
| Mirlinton Sechium edule  © Sergio Cusano |
Blue anise sage Salvia guaranítica  Violet variety© Sergio Cusano |
| Giant arrowhead Sagittaria montevidensis  © Sergio Cusano |
Silk floss tree Chorisia speciosa  © Sergio Cusano |
New butterfly species
Ethologus skipper
Nastra ethologus
25-04-15 © Ezequiel Núñez Bustos
25-04-15 © Ezequiel Núñez Bustos
Though its area of ditribution is the northeast of Argentina, this butterfly is considered to have a broader distribution. Its small size and colouring contributes to its passing unnoticed. Almost nothing is known about this butterfly. There is one record from Martín García Island, another from Punta Lara and this one from the reserve.
Gray-hooded Gull
Chroicocephalus cirrocephalus
25-04-15 © J. Simón Tagtachian
The lower gulls are brown-hooded gulls
Many-colored Rush Tyrant
Tachuris rubrigastra
21-04-15 © Hugo Aguilar
Sayaca Tanager
Thraupis sayaca
09-04-15 © Hugo Aguilar
Wren-like Rushbird
Phleocryptes melanops
09-04-15 © Hugo Aguilar
White-tipped Plantcutter
Phytotoma rutila
25-04-15 © J. Simón Tagtachian
The three white egrets at Coypu Pond
Cattle Egret
Bubulcus ibis
25-04-15 © Cora Rimoldi
Snowy Egret
Egretta thula
24-04-15 © Nicolás Giorgio
Cattle Egret
Bubulcus ibis
17-04-15 © Hugo Aguilar
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
25-04-15 © Dolores Fernández
Campo Flicker
Colaptes campestris
25-04-15 © J. Simón Tagtachian
Blue-and-white Swallow
Pygochelidon cyanoleuca
25-04-15 © J. Simón Tagtachian
Bare-faced Ibis
Phimosus infuscatus
25-04-15 © J. Simón Tagtachian
25-04-15 © J. Simón Tagtachian
White-faced Whistling-Duck
Dendrocygna viduata
09-04-15 © Hugo Aguilar
Fight between white-faced whistling-ducks
Black-capped Warbling-Finch
Poospiza melanoleuca
25-04-15 © J. Simón Tagtachian
Variable Oriole
Icterus pyrrhopterus
09-04-15 © Hugo Aguilar
White-crested Tyrannulet
Serpophaga subcristata
21-04-15 © Hugo Aguilar
Golden-crowned Warbler
Basileuterus culicivorus
21-04-15 © Hugo Aguilar
Roadside Hawk
Rupornis magnirostris
25-04-15 © J. Simón Tagtachian
| Lost and found | |
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| On Friday, 24th the Reserve was closed to look for a young man reported lost. Luckily he was found safe and sound. Both the personnel of the reserve, Policía Federal, Bomberos, Defensa Civil and Prefectura were involved in the search. Photos © Nicolás Giorgio |
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White-tipped Plantcutter
Phytotoma rutila
24-04-15 © Claudia y Diego Bastías
Black-headed Duck
Heteronetta atricapilla
23-04-15 © Claudia y Diego Bastías
Chimango Caracara
Milvago chimango
23-04-15 © Claudia y Diego Bastías
Rock Pigeon
Columba livia
21-04-15 © J. Simón Tagtachian
Large diving beetle
Megadytes giganteus
18-04-15 © Sergio Cusano
This beetle belongs into the family Dytiscidae, which are all aquatic. They spend their biological cycle in aquatic environments and are carnivores. Its body is hidrodinamyc and it has got hairs on its rear legs to swim more efficiently. They keep the air underneath their elytra, which are the hardened forewings which function like a case for the hindwings. When they need to get more air they go up to the surface exposing their rear part first. Though they are aquatic their wings are fully developed and can fly very well.
Golden Silk Orbweaver
Trichonephila clavipes
04-04-15 © Claudia y Tito Di Mauro
04-04-15 © Sergio Cusano
Cicada
Dorisiana drewseni
09-04-15 © Sergio Cusano
Camuati Wasp
Polybia scutellaris
21-03-15 © Victoria Mansilla
Paper wasp
Polistes sp.
21-03-15 © Victoria Mansilla
Hoverfly
Palpada sp
04-01-15 © Flor A Modeo
Cucurbit beetle
Diabrotica speciosa
04-04-15 © Victoria Mansilla
At wild peaVigna adenantha
White peacock
Anartia jatrophae
22-04-15 © J. Simón Tagtachian
22-04-15 © J. Simón Tagtachian
22-04-15 © J. Simón Tagtachian
Limpkin
Aramus guarauna
04-04-15 © Claudia y Tito Di Mauro
Southern Screamer
Chauna torquata
21-04-15 © J. Simón Tagtachian
21-04-15 © J. Simón Tagtachian
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
21-04-15 © J. Simón Tagtachian
21-04-15 © J. Simón Tagtachian
Warbling Doradito
Pseudocolopteryx flaviventris
21-04-15 © J. Simón Tagtachian
21-04-15 © J. Simón Tagtachian
21-04-15 © J. Simón Tagtachian
Coypu
Myocastor coypus
21-04-15 © Nicolás Giorgio
21-04-15 © Nicolás Giorgio
21-04-15 © J. Simón Tagtachian
Eating cattail stems
Least Grebe
Tachybaptus dominicus
18-04-15 © Sergio Cusano
Yellow-billed Cardinal
Paroaria capitata
21-04-15 © J. Simón Tagtachian
Unicolored Blackbird
Agelasticus cyanopus
21-04-15 © J. Simón Tagtachian
Hooded Siskin
Spinus magellanicus
21-04-15 © Nicolás Giorgio
21-04-15 © Nicolás Giorgio
Rufous Hornero
Furnarius rufus
22-04-15 © J. Simón Tagtachian
22-04-15 © J. Simón Tagtachian
Fawn-breasted Tanager
Pipraeidea melanonota
20-04-15 © Claudia y Diego Bastías
White-tipped Plantcutter
Phytotoma rutila
20-04-15 © Claudia y Diego Bastías
White-tipped Dove
Leptotila verreauxi
17-04-15 © Claudia y Diego Bastías
White-browed Blackbird
Sturnella superciliaris
18-04-15 © J. Simón Tagtachian
Tropical Parula
Setophaga pitiayumi
18-04-15 © J. Simón Tagtachian
Ultramarine Grosbeak
Cyanoloxia brissonii
18-04-15 © J. Simón Tagtachian
White-banded Mockingbird
Mimus triurus
04-04-15 © J. Simón Tagtachian
New access at Viamonte       The new access at Viamonte is already open to visitors © Sergio Cusano |
Works  Ditch to lay the cable for the bomb © Sergio Cusano |
Limpkin
Aramus guarauna
19-04-15 © Cora Rimoldi
We looked for the bird vocalizing. It was this young limpkin calling
Lutrine opossum (Lutreolina crassicaudata)
Lutreolina crassicaudata
19-04-15 © J. Simón Tagtachian
Photos in video format
Scarlet-headed Blackbird
Amblyramphus holosericeus
17-04-15 © Hugo Aguilar
18-04-15 © Hugo Aguilar
Rosy-billed Pochard
Netta peposaca
03-01-15 © Carlos González Ledo
Several young male rosy-billed pochards can be seen in the pond. If one pays attention we'll see they are in different stages to become male adults. The bill is rosier and the head and neck are darker. And this individual has a wounded wing.
18-04-15 © Sergio Cusano
The injured picazo along with a male cinnamon teal
15-04-15 © J. Simón Tagtachian
Here with a female rosy-billed pochard. After months an a half it seems that the injured wing is not an issue to survive
Red Shoveler
Anas platalea
18-04-15 © Sergio Cusano
18-04-15 © Diego Carús
18-04-15 © Diego Carús
Buff-winged Cinclodes
Cinclodes fuscus
18-04-15 © Diego Carús
Yellow-chevroned Parakeet
Brotogeris chiriri
18-04-15 © Sergio Cusano
Yellow-browed Tyrant
Satrapa icterophrys
18-04-15 © Diego Carús
Cinnamon Teal
Anas cyanoptera
18-04-15 © Sergio Cusano
With yellos-billed teals
Unicolored Blackbird
Agelasticus cyanopus
04-04-15 © Sergio Cusano
Rufescent Tiger-Heron
Tigrisoma lineatum
14-04-15 © Claudia y Diego Bastías
Eared Dove
Zenaida auriculata
18-04-15 © Sergio Cusano
Shiny Cowbird
Molothrus bonariensis
18-04-15 © Sergio Cusano
Cattle Egret
Bubulcus ibis
17-04-15 © Claudia y Diego Bastías
Scarlet-headed Blackbird
Amblyramphus holosericeus
17-04-15 © Claudia y Diego Bastías
Scarlet-headed Blackbird
Amblyramphus holosericeus
17-04-15 © Claudia y Diego Bastías
Nueva polilla
Bagworm
Oiketicus platensis
18-04-15 © Sergio Cusano
El bicho canasto pertenece a la familia Psychidae, que se caracteriza por estos canastos que las larvas construyen con seda y palitos de las plantas hospederas. Una vez construido no lo abandona más. En el último estadio de larva lo fija a una rama. Ahí permanece hasta la aparición del adulto. Si el adulto es una hembra queda recluida en el cesto porque no tiene alas y no vuela. El macho, en cambio, sale del canasto en busca de hembras a quienes fecunda en el nido. Las hembras ponen unos 1000 huevos que permanecen en el cesto hasta que se convierten en larvas. Estas salen del canasto hasta la vegetación y poco tiempo después comienzan a construir el canasto.
Lazy
Actinote sp.
29-03-15 © Victoria Mansilla
Oily lazy
Actinote mamita
05-01-14 © Cora Rimoldi
Velvetbean moth
Anticarsia gemmatalis
11-04-15 © Cora Rimoldi
Mariposas y polillas de abril
Ghost yellow
Eurema albula sinoe
04-04-15 © Sergio Cusano
Southern fritillary
Euptoieta hortensia
09-04-15 © Sergio Cusano
White-patched duskywing
Chiomara autander autander
02-04-15 © Sergio Cusano
Common yellow
Eurema deva
04-04-15 © Claudia y Tito Di Mauro
Russula metalmark
Emessis russula
09-04-15 © Sergio Cusano
Big lazy
Actinote pyrrha
02-04-15 © Sergio Cusano
American white skipper
Heliopyrgus americanus bellatrix
02-04-15 © Sergio Cusano
Pyrgus orcynoides
04-04-15 © Claudia y Tito Di Mauro
Stripestreak
Arawacus ellida
09-04-15 © Sergio Cusano
Whirlabout
Polites vibex catilina
04-04-15 © Sergio Cusano
12-04-15 © Victoria Mansilla
Lyssipoides metalmark
Riodina lyssipoides
04-04-15 © Sergio Cusano
Ithra crescent
Ortilia ithra
09-04-15 © Sergio Cusano
09-04-15 © Sergio Cusano
Common Lazy
Actinote pellenea
02-04-15 © Sergio Cusano
04-04-15 © Claudia y Tito Di Mauro
Mexican silverspot
Dione moneta
04-04-15 © Claudia y Tito Di Mauro
04-04-15 © Sergio Cusano
Gulf fritillary
Agraulis vanillae maculosa
04-04-15 © Claudia y Tito Di Mauro
Poltys satyr
Parypthimoides poltys
04-04-15 © Sergio Cusano
Fiery skipper
Hylephila phyleus
04-04-15 © Claudia y Tito Di Mauro
Southamerican lady
Vanessa braziliensis
02-04-15 © Sergio Cusano
Claudina crescent
Tegosa claudina
10-04-15 © J. Simón Tagtachian
Southern buckeye
Junonia genoveva hilaris
02-04-15 © Sergio Cusano
Southern Monarch
Danaus erippus
04-04-15 © Claudia y Tito Di Mauro
Ailanthus webworm moth
Atteva pustulella
04-04-15 © Claudia y Tito Di Mauro
Geometrid moth
Melanchroia aterea
02-04-15 © Sergio Cusano
Ash-colored Cuckoo
Coccycua cinerea
15-04-15 © Claudia y Diego Bastías
Yellow-chevroned Parakeet
Brotogeris chiriri
14-04-15 © Claudia y Diego Bastías
Vermilion Flycatcher
Pyrocephalus rubinus
14-04-15 © Claudia y Diego Bastías
Going back to winter grounds
Cinnamon Teal
Anas cyanoptera
10-04-15 © J. Simón Tagtachian
11-04-15 © Pablo Serur
12-04-15 © Eduardo Carreyra
12-04-15 © Eduardo Carreyra
12-04-15 © Eduardo Carreyra
Straneck's Tyrannulet
Serpophaga griseicapilla
12-04-15 © Eduardo Carreyra
We have begun to hear its song
Brown-hooded Gull
Chroicocephalus maculipennis
10-04-15 © J. Simón Tagtachian
Snail Kite
Rostrhamus sociabilis
10-04-15 © J. Simón Tagtachian
10-04-15 © J. Simón Tagtachian
White-faced Whistling-Duck
Dendrocygna viduata
15-12-14 © José Alberto Lell
White-tufted Grebe
Rollandia rolland
11-04-15 © Pablo Serur
Rosy-billed Pochard
Netta peposaca
15-12-14 © José Alberto Lell
The birds and the machine
10-04-15 © J. Simón Tagtachian
Wattled jacana, great kiskadee and cattle tyrant are frequent clients of the machine. When it removes the floating vegetation many insects are exposed or fly away and all these birds make the most of this situation to get nice morsels.
Red-eyed Vireo
Vireo olivaceus
10-04-15 © J. Simón Tagtachian
Plumbeous Rail
Pardirallus sanguinolentus
10-04-15 © J. Simón Tagtachian
Striated Heron
Butorides striata
10-04-15 © J. Simón Tagtachian
Blue-and-yellow Tanager
Pipraeidea bonariensis
10-04-15 © J. Simón Tagtachian
With bugweed fruit
White-tufted Grebe
Rollandia rolland
11-04-15 © Silvia Loiacono
Limpkin
Aramus guarauna
24-03-15 © Claudia y Tito Di Mauro
04-04-15 © Claudia y Tito Di Mauro
The limpkin keeps growing and is learning how to eat. First and second part
[viedo id="285" options="name,description,photographer" size="large"]
Green Kingfisher
Chloroceryle americana
04-04-15 © Claudia y Tito Di Mauro
First the female preening herself and then the male perched with the typical flip of the tail
| Domestic variant of Mallard Duck Anas platyrhynchos domesticus  © Jorge La Grotteria © J. Simón TagtachianPhotographed during the Birding Challenge on 21st of February. In both pictures it is with a Rosy-billed Pochard. Difference in size is clearly appreciated. |
The twists and turns of the Straneck's tyrannulet
Two among all the tyrannulets are very much alike - Serpophaga subcristata and Serpophaga munda. They dominated the scene when Berlioz described a third species resembling the previous ones: Serpophaga griseiceps in 1959. More than twenty years later new investigations determined that this tyrannulet Serpophaga griseiceps was the juvenile form of Serpophaga munda and again the number was reduced to the two initial tyrannulets.
In 1993 Straneck unifes Serpophaga subcristata and Serpophaga munda since they had the same vocalization. So the result was Serpophaga subcristata subcristata and Serpophaga subcristata munda as subspecies. But he describes a new species which does have a different song. The characteristics of this new tyrannulet coincided with the Berlioz's description of Serpophaga griseiceps. So Straneck recovers the name Serpophaga griseiceps. In 2004 the fusion of both Serpophaga griseiceps and Serpophaga munda was convalidated only on the grounds of the skins. In 2007 Straneck explains the flaws of this work and at the same time formally describes this tyrannulet as Serpophaga griseicapilla since it differs both in vocalization, size and crown. In Spanish it is called piojito trinador and in English is known as Straneck’s Tyrannulet, after Straneck. Something unusual since names are not given after living ornithologists.
Straneck's Tyrannulet
Serpophaga griseicapilla
10-04-15 © Claudia y Diego Bastías
18-08-14 © Carlos González Ledo
The Straneck's tyrannulet is one of the winter visitors that has already arrived. Though it is not seen in the video, it can be perfectly heard. This tyrannulet is very much like the White-crested Tyrannulet Serpophaga subcristata which is a resident bird. A slight difference in size -the white-crested is one cm longer on average- and the crown of the Straneck's Tyrannulet has not or has less white than that of the White-crested Tyrannulet. These two characteristics are very difficult to distinguish at a distance.
But two clues help: the most reliable is vocalizations since they are quite different and secondly season -Straneck's tyrannulet is a winter visitor and the White-crested tyrannulet is all year round. So the worst situation is the bird in winter and in silence.
White-crested Tyrannulet
Serpophaga subcristata
30-08-14 © Claudia y Tito Di Mauro
Let's hear the voice of this tyrannulet
Whistling Heron
Syrigma sibilatrix
09-04-15 © J. Simón Tagtachian
Cattle Tyrant
Machetornis rixosa
09-04-15 © Sergio Cusano
Ringed Teal
Callonetta leucophrys
09-04-15 © Nicolás Giorgio
Spectacled Tyrant
Hymenops perspicillatus
04-04-15 © Claudia y Tito Di Mauro
Rosy-billed Pochard
Netta peposaca
07-04-15 © Nicolás Giorgio
Southern Lapwing
Vanellus chilensis
07-04-15 © Nicolás Giorgio
09-04-15 © Sergio Cusano
Limpkin
Aramus guarauna
06-04-15 © Claudia y Diego Bastías
07-04-15 © Nicolás Giorgio
Least Grebe
Tachybaptus dominicus
08-04-15 © Alec Earnshaw
The least grebe caught a freshwater shrimp
Roseate Spoonbill
Platalea ajaja
05-04-15 © Cora Rimoldi
The day before a group of 25 was seen flying by. At Coypu Pond I found these only three individuals
04-04-15 © Claudia y Tito Di Mauro
Double-collared Seedeater
Sporophila caerulescens
08-04-15 © Cora Rimoldi
Snail Kite
Rostrhamus sociabilis
04-04-15 © J. Simón Tagtachian
Cocoi Heron
Ardea cocoi
04-04-15 © J. Simón Tagtachian
04-04-15 © Claudia y Tito Di Mauro
Green Kingfisher
Chloroceryle americana
04-04-15 © J. Simón Tagtachian
04-04-15 © J. Simón Tagtachian
It introduces the bill and gapes with force to break the twig and reach the insect
Variable Oriole
Icterus pyrrhopterus
04-04-15 © J. Simón Tagtachian
With a succulent caterpillar taken from the galls of Sapium haematospermum.
Blue-and-white Swallow
Pygochelidon cyanoleuca
04-04-15 © J. Simón Tagtachian
Cinnamon Teal
Anas cyanoptera
04-04-15 © Silvia Loiacono
04-04-15 © J. Simón Tagtachian
Roseate Spoonbill
Platalea ajaja
04-04-15 © Sergio Cusano
04-04-15 © J. Simón Tagtachian
04-04-15 © J. Simón Tagtachian
A group of 25 individuals
New butterfly species
Juno
Dione juno juno
04-04-15 © Sergio Cusano
04-04-15 © Sergio Cusano
04-04-15 © Claudia y Tito Di Mauro
Swainson's Flycatcher
Myiarchus swainsoni
02-04-15 © Javier Ubiría
Streaked Flycatcher
Myiodynastes maculatus
04-04-15 © Sergio Cusano
Tropical Kingbird
Tyrannus melancholicus
04-04-15 © Sergio Cusano
Brown-chested Martin
Progne tapera
02-04-15 © Sergio Cusano
White-winged Becard
Pachyramphus polychopterus
04-04-15 © J. Simón Tagtachian
Vermilion Flycatcher
Pyrocephalus rubinus
04-04-15 © Sergio Cusano
04-04-15 © Sergio Cusano
Spectacled Tyrant
Hymenops perspicillatus
04-04-15 © Sergio Cusano
Least Grebe
Tachybaptus dominicus
02-04-15 © Sergio Cusano
Red-crested Cardinal
Paroaria coronata
02-04-15 © Sergio Cusano
Limpkin
Aramus guarauna
30-03-15 © Claudia y Diego Bastías
Greyish Baywing
Agelaioides badius
30-03-15 © Claudia y Diego Bastías
