News - August 2016


Three raptors
Three raptors
General differences and similitudes between the commonest accipitrids and falconids of the reserve.
Read more

Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
31-08-16 © J. Simón Tagtachian



Flowers and fruits
Woodland passion flower
Passiflora morifolia
Pasionaria de hoja de moral/Woodland passion flower© Nicolás Giorgio

Prunus sp
prunus sp© Sergio Cusano
Chinese wisteria
Wisteria sinensis
Glicina/Chinese wisteria© J. Simón Tagtachian
Three-cornered leek
Allium triquetrum
Lágrima de la virgen/Three-cornered leek© J. Simón Tagtachian

Schinus longifolius
Molle/Schinus longifolius© Sergio Cusano
London plane
Platanusxacerifolia
Plátano/London plane© J. Simón Tagtachian
Mandarin tree
Citrus reticulata
Mandarino/Mandarin tree© J. Simón Tagtachian
Lantana
Lantana camara
Lantana© J. Simón Tagtachian
Photos by Eduardo Ibarra
Eduardo Ibarra tells uscuenta "I met people working for MA of CABA and told me about the progress of the works. I told them about some sectors with rubbish and took them to see the masked ducks at Viamonte. They said they would see to it. God knows whether they will do something but I brought up the issues I can see everyday". Photos taken on 18th and 19th of August
0200_eib_8© Eduardo Ibarra 0300_eib_3© Eduardo Ibarra
0300_eib_5© Eduardo Ibarra coipos amanecer EIB 19 8 16_8© Eduardo Ibarra
coipos amanecer EIB 19 8 16_9© Eduardo Ibarra coipos amanecer EIB 19 8 16© Eduardo Ibarra
coipos amanecer EIB 19 8 16_2© Eduardo Ibarra coipos amanecer EIB 19 8 16_4© Eduardo Ibarra
coipos amanecer EIB 19 8 16_6© Eduardo Ibarra coipos amanecer EIB 19 8 16_5© Eduardo Ibarra
coipos EIB 18 8 16© Eduardo Ibarra islote coipos EIB 18 8 16© Eduardo Ibarra
nuevo mirador EIB 18 8 16© Eduardo Ibarra nuevo mirador EIB 19 8 16_1© Eduardo Ibarra
ratona EIB 5 8 16© Eduardo Ibarra sirirí pampa EIB 6 8 166 8 16 © Eduardo Ibarra

House Wren
Troglodytes aedon
House Wren
05-08-16 © Eduardo Ibarra
White-faced Whistling-Duck
Dendrocygna viduata
White-faced Whistling-Duck
06-08-16 © Eduardo Ibarra




Saturday 27th, a rainy day and Sunday 28th, the reserve was closed Anyway I walked the outer sidewalk: It was very cloudy and cold. Bad news There was not a single masked duck. As for the other waterbirds, the coscoroba swan is still nesting and I could not see the little herons because they were covered by the adult. Too many pied-billed grebes - I counted 10. Three spot-flanked gallinules. Two at the Brasil end, the other one at Viamonte end.




Chimango Caracara
Milvago chimango
Chimango Caracara
26-08-16 © Horacio José Patrone
Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
26-08-16 © Horacio José Patrone
Rufescent Tiger-Heron
26-08-16 © Horacio José Patrone
Gray-breasted Martin
Progne chalybea
Gray-breasted Martin
25-08-16 © Claudia Mon
Gray-breasted Martin
25-08-16 © Claudia Mon
Gray-breasted Martin
25-08-16 © Claudia Mon

Grey-breasted Martins have already arrived and they gathered at the antenna as usual. But the caracara came and drove them away. The antenna was used as a stop by a pair of caracara during the absence of martins. Some sticks can be seen.

Southern Caracara
25-08-16 © Claudia Mon

The caracara demanding his space

Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
25-08-16 © Rodolfo Pani
Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
25-08-16 © Rodolfo Pani

A spectacular image of the Brazilian teal's speculum

Sooty-fronted Spinetail
Synallaxis frontalis
Sooty-fronted Spinetail
25-08-16 © Rodolfo Pani
Plumbeous Rail
Pardirallus sanguinolentus
Plumbeous Rail
25-08-16 © Nicolás Giorgio
Great Grebe
Podiceps major
Great Grebe
25-08-16 © Claudia Mon

Showing the lobate foot. Unlike ducks, whose three digits (2-3-4) are connected by a membrane, in the grebes these three digits show lobes on each finger. This gives the grebes more freedom to move each finger separately. 

Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
22-08-16 © J. Simón Tagtachian

Two chicks. On Saturday 20th we barely saw the down of one chick

Spot-flanked Gallinule
Gallinula melanops
Spot-flanked Gallinule
22-08-16 © J. Simón Tagtachian

Two spot-flanked gallinules together. Are they back to breed?


Feeding
Harris's Hawk
Parabuteo unicinctus
Harris's Hawk
25-08-16 © Rodolfo Pani

A juvenile with a tegu lizard as prey. At the Rehab Center we were informed that this individual was realeased on August 11th. It came from La Boca and was rescued by Defensa Civil on July 11th. Number 856.

Harris's Hawk
25-08-16 © Rodolfo Pani

A juvenile with a tegu lizard as prey. At the Rehab Center we were informed that this individual was realeased on August 11th. It came from La Boca and was rescued by Defensa Civil on July 11th. Number 856.

Harris's Hawk
26-08-16 © Horacio José Patrone

This juvenile caught something very hairy

Great Egret
Ardea alba
Great Egret
25-08-16 © Nicolás Giorgio
Pied-billed Grebe
Podilymbus podiceps
Pied-billed Grebe
22-08-16 © J. Simón Tagtachian
Pied-billed Grebe
22-08-16 © J. Simón Tagtachian

Narrow-billed Woodcreeper
Lepidocolaptes angustirostris
Narrow-billed Woodcreeper
06-08-16 © Rodolfo Pani

Urutu pit viper
Bothrops alternatus
Yarará grande/Urutu pit viper

Yarará grande/Urutu pit viper24 8 16 © J. Simón Tagtachian
Bay tree
Laurus nobilis
Laruel común/Bay tree20 8 16 © Sergio Cusano
It belongs to the Family Lauraceae. It is native to the Mediterranean Basin. It is dioecious. In female plants the yellow flowers we see becomes an oval black fruit. Its aromatic leaves are useful in cooking.

Black-collared Hawk
Busarellus nigricollis
Black-collared Hawk
19-08-16 © Juan Manuel Ibáñez

Newly borns, sweet waiting, romance y something more

Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
20-08-16 © Claudia Mon

I had portended that the tiger-heron chicks had arrived and was not mistaken. Still very concealed but some white down may be seen. How many are there? They normally lay two or three eggs. We hope the clutch will prosper. Two caracaras pounced on the nest fruitlessly.

Coscoroba Swan
Coscoroba coscoroba
Coscoroba Swan
20-08-16 © Claudia Mon

Not too long for the family to become larger

Coscoroba Swan
20-08-16 © Claudia Mon

Not too long for the family to become larger

Rufous Hornero
Furnarius rufus
Rufous Hornero
20-08-16 © Sergio Cusano
Great Grebe
Podiceps major
Great Grebe
20-08-16 © Claudia Mon

Too many expectations about this pair. We have been watching it since long

Great Grebe
20-08-16 © Claudia Mon

Too many expectations about this pair. We have been watching it since long

Great Grebe
20-08-16 © Claudia Mon

Too many expectations about this pair. We have been watching it since long

Rock Pigeon
Columba livia
Rock Pigeon
20-08-16 © Claudia Mon
Rock Pigeon
20-08-16 © Claudia Mon
Spot-winged Pigeon
Patagioenas maculosa
Spot-winged Pigeon
20-08-16 © Sergio Cusano

Black-necked Stilt
Himantopus mexicanus
Black-necked Stilt
20-08-16 © Sergio Cusano

Along the river coast

Vermilion Flycatcher
Pyrocephalus rubinus
Vermilion Flycatcher
20-08-16 © Claudia Mon
Long-tailed Reed Finch
Donacospiza albifrons
Long-tailed Reed Finch
17-08-16 © Daniel J. Rodríguez
Long-tailed Reed Finch
17-08-16 © Daniel J. Rodríguez
Rufous-browed Peppershrike
Cyclarhis gujanensis
Rufous-browed Peppershrike
20-08-16 © Claudia Mon
[photo id="4726" options="name,description,photographer" size="large"



Common Gallinule
Gallinula galeata
Common Gallinule
20-08-16 © Sergio Cusano
Common Gallinule
20-08-16 © Sergio Cusano
Common Gallinule
20-08-16 © Sergio Cusano

The typical fight between common gallinules on their backs and using the wings to support their body. In this way feet are free to attack 

While the above gallinules were in a frank combat the one below was more worried about the wind's effect on its feather
Common Gallinule
20-08-16 © Claudia Mon
White-tipped Dove
Leptotila verreauxi
White-tipped Dove
20-08-16 © Claudia Mon
Ringed Teal
Callonetta leucophrys
Ringed Teal
20-08-16 © Sergio Cusano

Since a long time ago this is the only pair found always in the same place. On a bent branch above water of a tree at the Brasil end

Shiny Cowbird
Molothrus bonariensis
Shiny Cowbird
20-08-16 © Sergio Cusano

Changing head feathers



Works Obras/Works

Obras/Works20 8 16 © Sergio Cusano
Repairing poles and chains.
Insects
Moth Caterpillar Family Erebidae Familia Erebidae/Family Erebidae© Elsa y Guillermo Monarch
Danaus erippus
Monarca/Monarch© Sergio Cusano

Black and red bug
Largus rufiventris
Black and red bug
06-08-16 © Sergio Cusano
Black and red bug
06-08-16 © Elsa y Guillermo Marcaida
Hoverfly
Syrphus sp.
Hoverfly
08-08-16 © J. Simón Tagtachian




Caraú
Aramus guarauna

11 8 16 © Claudia Mon

Checkered Woodpecker
Veniliornis mixtus
11-08-16 © Roberto Ares
Unicolored Blackbird
Agelasticus cyanopus
16-08-16 © Claudia Mon




Maguari Stork
Ciconia maguari
Maguari Stork
16-08-16 © J. Simón Tagtachian
Snail Kite
Rostrhamus sociabilis
Snail Kite
16-08-16 © J. Simón Tagtachian
Snail Kite
16-08-16 © J. Simón Tagtachian
Snail Kite
16-08-16 © J. Simón Tagtachian
Snail Kite
16-08-16 © J. Simón Tagtachian
Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
16-08-16 © J. Simón Tagtachian
Diademed Tanager
Stephanophorus diadematus
Diademed Tanager
16-08-16 © J. Simón Tagtachian
Diademed Tanager
16-08-16 © J. Simón Tagtachian

Most certainly one of the juveniles we saw in February

White-faced Ibis
Plegadis chihi
White-faced Ibis
16-08-16 © J. Simón Tagtachian

Mixed flock of white-faced and bare-faced ibises. Since they travel together, one must look attentively at each individual to know if the two species are present. Legs not extending beyond the tail, Bare-faced Ibis Phimosus infuscatus, if they do extend beyond the tail, White-faced Ibis Plegadis chihi

White-faced Ibis
16-08-16 © J. Simón Tagtachian

Mixed flock of white-faced and bare-faced ibises. Since they travel together, one must look attentively at each individual to know if the two species are present. Legs not extending beyond the tail, Bare-faced Ibis Phimosus infuscatus, if they do extend beyond the tail, White-faced Ibis Plegadis chihi

Roadside Hawk
Rupornis magnirostris
Roadside Hawk
16-08-16 © J. Simón Tagtachian

This pair is always perched in the same tree in the Gull Pond some 200 mts away from the Middle Path

Spectacled Tyrant
Hymenops perspicillatus
Spectacled Tyrant
16-08-16 © J. Simón Tagtachian

The white colour of primaries with opened wings becomes a small white stripe or may not be seen at all when wings are closed  

Spot-flanked Gallinule
Gallinula melanops
Spot-flanked Gallinule
14-08-16 © Gustavo F. Brahamian
Masked Duck
Nomonyx dominicus
Masked Duck
14-08-16 © Gustavo F. Brahamian

The duck is preening and showing the white spot on the wing 

Great Grebe
Podiceps major
Great Grebe
14-08-16 © Gustavo F. Brahamian

Black-headed Duck
Heteronetta atricapilla
Black-headed Duck
13-08-16 © Ariel Méndez Zébè
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
Yellow-chinned Spinetail
13-08-16 © Pablo Serur
Rufous-sided Crake
Laterallus melanophaius
Rufous-sided Crake
13-08-16 © Ariel Méndez Zébè
Green-winged Saltator
Saltator similis
Green-winged Saltator
13-08-16 © Pablo Serur
Snowy Egret
Egretta thula
Snowy Egret
13-08-16 © Ariel Méndez Zébè

A snowy egret Egrette thula flying and a great egret Ardea alba at the back in the water. The Great Egret's lore is green and egrets can be seen, both are signs of breeding time.

Great Egret
Ardea alba
Great Egret
13-08-16 © Ariel Méndez Zébè
Red-fronted Coot
Fulica rufifrons
Red-fronted Coot
13-08-16 © Ariel Méndez Zébè
Red-fronted Coot
13-08-16 © Ariel Méndez Zébè
Red-fronted Coot
13-08-16 © Ariel Méndez Zébè

Two pairs fighting

Shiny Cowbird
Molothrus bonariensis
13-08-16 © Cora Rimoldi
Narrow-billed Woodcreeper
Lepidocolaptes angustirostris
Narrow-billed Woodcreeper
13-08-16 © Ariel Méndez Zébè
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
Yellow-chinned Spinetail
10-08-16 © Nicolás Giorgio



Coypu
Myocastor coypus
Coipo/Coypu13 8 16 © Ariel Méndez Zébé
There are several coypus and many are small. Tehy eat at the edge of the roads and do not feel threatened by human presence.
Removing rubbish Limpieza/Cleaning13 8 16 © Ariel Méndez Zébé
Removing rubbish selectively. From the pontoon the workder picks up rubbish

Yellow-chinned Spinetail
Certhiaxis cinnamomeus
Yellow-chinned Spinetail
10-08-16 © Nicolás Giorgio
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
10-08-16 © Nicolás Giorgio
Pied-billed Grebe
Podilymbus podiceps
Pied-billed Grebe
11-08-16 © Nicolás Giorgio

ALERT: Black-chested Buzzard-Eagle near Costanera

Black-chested Buzzard-Eagle
Geranoaetus melanoleucus
Black-chested Buzzard-Eagle
09-08-16 © J. Simón Tagtachian
Black-chested Buzzard-Eagle
09-08-16 © J. Simón Tagtachian
Black-chested Buzzard-Eagle
09-08-16 © J. Simón Tagtachian



Maguari Stork
Ciconia maguari
Maguari Stork
12-08-16 © J. Simón Tagtachian
Ultramarine Grosbeak
Cyanoloxia brissonii
Ultramarine Grosbeak
12-08-16 © J. Simón Tagtachian
Rufous Hornero
Furnarius rufus
Rufous Hornero
12-08-16 © J. Simón Tagtachian
Chimango Caracara
Milvago chimango
Chimango Caracara
11-08-16 © J. Simón Tagtachian
White-rumped Swallow
Tachycineta leucorrhoa
White-rumped Swallow
10-08-16 © J. Simón Tagtachian
Red-gartered Coot
Fulica armillata
Red-gartered Coot
10-08-16 © J. Simón Tagtachian
Red-gartered Coot
10-08-16 © J. Simón Tagtachian
Snail Kite
Rostrhamus sociabilis
Snail Kite
09-08-16 © J. Simón Tagtachian
Snail Kite
09-08-16 © J. Simón Tagtachian
White-faced Ibis
Plegadis chihi
White-faced Ibis
09-08-16 © J. Simón Tagtachian
Yellow-browed Tyrant
Satrapa icterophrys
Yellow-browed Tyrant
09-08-16 © J. Simón Tagtachian
Roadside Hawk
Rupornis magnirostris
Roadside Hawk
09-08-16 © J. Simón Tagtachian
Lake Duck
Oxyura vittata
Lake Duck
09-08-16 © J. Simón Tagtachian
Unicolored Blackbird
Agelasticus cyanopus
Unicolored Blackbird
09-08-16 © J. Simón Tagtachian
Masked Duck
Nomonyx dominicus
Masked Duck
09-08-16 © Nicolás Giorgio
Mallard Duck
Anas platyrhynchos
Mallard Duck
09-08-16 © Nicolás Giorgio

These are the only two mallard ducks left in the reserve. The white one, the pekin duck, is the agrotype and the green-headed has an ancestral plumage. Both are domestic and belong to the same species. 

Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
09-08-16 © Nicolás Giorgio
Coscoroba Swan
Coscoroba coscoroba
Coscoroba Swan
09-08-16 © Nicolás Giorgio

Only one pair of coscoroba swan arrived at the pond. Here one individual eating a snail



White-rumped Swallow
Tachycineta leucorrhoa
White-rumped Swallow
08-08-16 © J. Simón Tagtachian
White-tipped Plantcutter
Phytotoma rutila
White-tipped Plantcutter
08-08-16 © J. Simón Tagtachian
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Blue-billed Black-Tyrant
08-08-16 © J. Simón Tagtachian
08-08-16 © Cora Rimoldi
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Blue-billed Black-Tyrant
08-08-16 © J. Simón Tagtachian
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Blue-billed Black-Tyrant
08-08-16 © J. Simón Tagtachian
Blue-billed Black-Tyrant
Knipolegus cyanirostris
Blue-billed Black-Tyrant
08-08-16 © J. Simón Tagtachian
08-08-16 © Cora Rimoldi

Voice of black-rufous warbling-finch is heard at the beginning and the one of the rufous-collared sparrow at the end.

Diademed Tanager
Stephanophorus diadematus
Diademed Tanager
08-08-16 © J. Simón Tagtachian
White-tipped Dove
Leptotila verreauxi
White-tipped Dove
08-08-16 © J. Simón Tagtachian
Black-capped Warbling-Finch
Poospiza melanoleuca
Black-capped Warbling-Finch
08-08-16 © J. Simón Tagtachian
Kelp Gull
Larus dominicanus
Kelp Gull
08-08-16 © J. Simón Tagtachian
Southern Caracara
Caracara plancus
Southern Caracara
08-08-16 © J. Simón Tagtachian

There were 13 at Viamonte little square

Wattled Jacana
Jacana jacana
Wattled Jacana
08-08-16 © J. Simón Tagtachian

Adult and juvenile



Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
07-08-16 © Carlos González Ledo
Rufescent Tiger-Heron
07-08-16 © Carlos González Ledo
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
07-08-16 © Carlos González Ledo
White-tufted Grebe
07-08-16 © Carlos González Ledo
Southern Screamer
Chauna torquata
Southern Screamer
07-08-16 © Carlos González Ledo

Carlos counted seven screamers

Coscoroba Swan
Coscoroba coscoroba
Coscoroba Swan
07-08-16 © Carlos González Ledo
Southern Caracara
Caracara plancus
Southern Caracara
06-08-16 © Jorge García Vicente
Southern Caracara
Caracara plancus
Southern Caracara
06-08-16 © Jorge García Vicente
Southern Caracara
Caracara plancus
Southern Caracara
06-08-16 © Jorge García Vicente

Colubroidean snake
Helicops infrataeniatus
cule acua común CSZ 6 8 16_76 8 16 © Carlos Schmidtutz

cule acua común CSZ 6 8 16_56 8 16 © Carlos Schmidtutz

cule acua común CSZ 6 8 16_26 8 16 © Carlos Schmidtutz
Since the floods we have been finding this snake quite regularly. The position of eyes and nostrils is typical of aquatic snakes.
Article on the first register of the Yellow-breasted Crake by Luis Pagano and María Cecilia Chiale in Nuestras Aves burrito amarillloSmall gallinule or crake? Luis and María Cecilia explain why they prefer to call it small gallinule and provide more information. (The article is in Spanish)





Outing in Ex-Covimet
The walk had been organized to visit with the corresponding authorization. We met at Viamonte. The reserve was closed so we walked up to Brasil along the outer sidewalk. As soon as we arrived the reserve opened to the public. It was a very nice morning and these are the top birds
Views from Ex-Covimet Vista desde Covimet/View from Covimet6 8 16 © Sergio Cusano

Vista desde Covimet/View from Covimet6 8 16 © Sergio Cusano

Sharp-billed Canastero
Asthenes pyrrholeuca
Sharp-billed Canastero
06-08-16 © Sergio Cusano
Diademed Tanager
Stephanophorus diadematus
Diademed Tanager
06-08-16 © Sergio Cusano
Spot-winged Pigeon
Patagioenas maculosa
Spot-winged Pigeon
06-08-16 © Sergio Cusano



Green Kingfisher
Chloroceryle americana
Green Kingfisher
06-08-16 © Sergio Cusano
Maguari Stork
Ciconia maguari
Maguari Stork
06-08-16 © Sergio Cusano
Screaming Cowbird
Molothrus rufoaxillaris
Screaming Cowbird
06-08-16 © Sergio Cusano
Tropical Parula
Setophaga pitiayumi
Tropical Parula
06-08-16 © Sergio Cusano
White-tufted Grebe
Rollandia rolland
White-tufted Grebe
06-08-16 © Sergio Cusano
Some views
Dawn Amanecer/Dawn6 8 16 © Sergio Cusano
New viewpoint Nuevo mirador/New viewpoint6 8 16 © Sergio Cusano



salida_20160806_800px

Pato cabeza negra y garcitas blanca
Heteronetta atricapilla - Egretta thula

4 8 16 © Claudia Mon

White-crested Tyrannulet
Serpophaga subcristata
04-08-16 © Claudia Vilma Mon
Lake Duck
Oxyura vittata
04-08-16 © Claudia Vilma Mon



Rufescent Tiger-Heron
Tigrisoma lineatum
Rufescent Tiger-Heron
04-08-16 © Claudia Mon

Several birds are showing signs of reproduction. The rufescent tiger-heron has been sittion on eggs since some weeks ago

Harris's Hawk
Parabuteo unicinctus
Harris's Hawk
04-08-16 © Claudia Mon
Harris's Hawk
04-08-16 © Claudia Mon
Great Grebe
Podiceps major
Great Grebe
02-08-16 © J. Simón Tagtachian

The pair is still together

Great Grebe
02-08-16 © J. Simón Tagtachian

The pair is still together

Southern Screamer
Chauna torquata
Southern Screamer
02-08-16 © J. Simón Tagtachian
Masked Duck
Nomonyx dominicus
Masked Duck
04-08-16 © Claudia Mon
Masked Duck
04-08-16 © Claudia Mon
Masked Duck
02-08-16 © J. Simón Tagtachian
White-tipped Dove
Leptotila verreauxi
White-tipped Dove
02-08-16 © J. Simón Tagtachian
White-tipped Dove
02-08-16 © J. Simón Tagtachian