News - June 2013

Works in the reserve
obras/works © J. Simón Tagtachianobras/works So looked Canal Viamonte on the June, 29th. Water pumping began five days before. This is the initial stage to recover water into the ponds. © J. Simón Tagtachian

Silver Teal
Anas versicolor
Silver Teal
29-06-13 © J. Simón Tagtachian

At Canal Carlota Roberts, former canal sudeste

Great Grebe
Podiceps major
Great Grebe
26-06-13 © J. Simón Tagtachian

Backlit grebe

Yellow-billed Teal
Anas flavirostris
Yellow-billed Teal
26-06-13 © J. Simón Tagtachian

At Canal Carlota Roberts, former Canal Sudeste


Many-colored Rush Tyrant
Tachuris rubrigastra
Many-colored Rush Tyrant
26-06-13 © J. Simón Tagtachian

At Canal Viamonte

Hepatic Tanager
Piranga flava
Hepatic Tanager
25-06-13 © J. Simón Tagtachian

During the walk we found several camuati nests. As we were passing by this female Hepatic Tanager appeared and began to peck at the back part of the nest. The tanager cuts pieces of the nest and seems to chew them to extract honey from them.

Tropical Parula
Setophaga pitiayumi
Tropical Parula
26-06-13 © J. Simón Tagtachian
American Kestrel
Falco sparverius
American Kestrel
22-06-13 © Gustavo F. Brahamian
Red-fronted Coot
Fulica rufifrons
Red-fronted Coot
22-06-13 © J. Simón Tagtachian
Plumbeous Rail
Pardirallus sanguinolentus
Plumbeous Rail
22-06-13 © J. Simón Tagtachian

With common gallinule on the right and juvenile rufescent tiger-heron in the middle

White-tipped Plantcutter
Phytotoma rutila
White-tipped Plantcutter
22-06-13 © J. Simón Tagtachian
White-tipped Plantcutter
01-06-13 © J. Simón Tagtachian



Potter and paper wasps
Potter and paper wasps
26-06-13 © J. Simón Tagtachian

Two paper wasp nests one next to the other. The thorny camuati wasp nest Polybia scutellaris on the left, The smooth Brachygastra lecheguana's on the right.



Sharp-billed Canastero
Asthenes pyrrholeuca
Sharp-billed Canastero
15-06-13 © Pablo Serur
Long-winged Harrier
Circus buffoni
Long-winged Harrier
15-06-13 © Pablo Serur
Brazilian Teal
Amazonetta brasiliensis
Brazilian Teal
15-06-13 © Pablo Serur
Grey-throated Warbling-Finch
Poospiza cabanisi
Grey-throated Warbling-Finch
08-06-13 © Pablo Serur
Grey-throated Warbling-Finch
Poospiza cabanisi
Grey-throated Warbling-Finch
08-06-13 © Pablo Serur
Nenday Parakeet
Aratinga nenday
Nenday Parakeet
15-06-13 © J. Simón Tagtachian
Nenday Parakeet
15-06-13 © J. Simón Tagtachian

44 individuals




Creole Frog
Leptodactylus latrans
Rana criolla/Creole frog© Ariel Méndez Zébè
Creole Frog
Leptodactylus latrans
Rana criolla/Creole frog© Ariel Méndez Zébè
Boston Ivy
Parthenocissus tricuspidata
An exotic ivy with leaves already red before falling in winter © Carlos Gonzalez Ledo
Lemon Tree
Citrus x limon
Limonero/Lemon tree© J. Simón Tagtachian

Gastroliths
Pepitero de collarJ/Golden-billed SaltatorJ Pepitero de collarJ/Golden-billed SaltatorJ
Pepitero de collarJ/Golden-billed SaltatorJ Pepitero de collarJ/Golden-billed SaltatorJ
Photos © Nicolás Giorgio Nicolás tells us: "I was walking to the Canal sudeste and ahead on the path, some 30 mts. I can see a bird pecking and giving little jumps. I realize it is a Golden-billed Saltator. I was surprised to see it was pecking at small stones and pit. It takes them, keeps them in the bill and with a small jump swallows it quickly. It repeats the action and reminds me of someone taking some nasty medicine and being obliged to it does it quickly to get rid of it. Some time later it leaves the road and goes to a Chinese privet
Ligustrum lucidum to eat fruits. Then I checked the place and found that there were only small stones, there were no fruits scattered on the ground and the stones had no substance which the bird would like. I had the feeling that the saltator knew what it was doing and that these stones could possible aid in digestion. "

These small stones this juvenile of Golden-bill Saltator swallowed will help "chew" food. Since birds have no teeth the mastication is carried out in the muscular part of the stomach, named gizzard, and which is in the back part of the stomach. The front part of the stomach is the proventriculus which secretes digestive juices (enzimes and acids). Here we will concentrate on the gizzard which the area related to the stones. The gizzard has the form of a disc and is better or worse developed depending on the type of food the bird takes. The gizzard has very powerful muscular walls which contract in alternated form to mechanically grind the food. It is the equivalent to our teeth. It is here in the gizzard where the stones lodge. They are known as gastroliths (stones of the stomach). Together with the action of the muscular walls the gastroliths make the process of digestion more efficient. But at the same time gastroliths get polished. The minerals contained are absorbed from the stomach and the intestine into the bloodstream. Thus they become a nutritional supplement. CR

New bird species
Orange-headed Tanager
Thlypopsis sordida
Orange-headed Tanager
14-06-13 © José Aris Martínez

Yellow-browed Tyrant
Satrapa icterophrys
Yellow-browed Tyrant
08-06-13 © Marcelo Castro
White-banded Mockingbird
Mimus triurus
White-banded Mockingbird
01-06-13 © Gustavo F. Brahamian
Cocoi Heron
Ardea cocoi
Cocoi Heron
08-06-13 © J. Simón Tagtachian
Red-gartered Coot
Fulica armillata
Red-gartered Coot
01-06-13 © J. Simón Tagtachian

With white-winged coot on the right

White-faced Ibis
Plegadis chihi
White-faced Ibis
08-06-13 © J. Simón Tagtachian
Harris's Hawk
Parabuteo unicinctus
Harris's Hawk
27-04-13 © Ezequiel Paolini
Chimango Caracara
Milvago chimango
Chimango Caracara
26-05-13 © Carlos González Ledo
White-crested Tyrannulet
Serpophaga subcristata
White-crested Tyrannulet
01-06-13 © Gustavo F. Brahamian
Roadside Hawk
Rupornis magnirostris
Roadside Hawk
08-06-13 © J. Simón Tagtachian
Greyish Baywing
Agelaioides badius
Greyish Baywing
01-06-13 © Gustavo F. Brahamian

Last butterflies of the seasonmariposas/butterliesTop left: Gulf Fritillary
Agraulis vanillae maculosa © J. Simón Tagtachian Top right: Southamercian Lady
Vanessa braziliensis, © Carlos González Ledo Center: Monarch
Danaus erippus © Carlos González Ledo Bottom left: Common yellow
Eurema deva © J. Simón Tagtachian Bottom right: Dichrous skipper
Theagenes dichrous, © Carlos González Ledo



More photos of the survey
Campo Flicker
Colaptes campestris
Campo Flicker
01-06-13 © Jorge Talkowski
Monk Parakeet
Myiopsitta monachus
Monk Parakeet
01-06-13 © J. Simón Tagtachian
Sulphur-throated Spinetail
Cranioleuca sulphurifera
Sulphur-throated Spinetail
01-06-13 © J. Simón Tagtachian
Yellow-winged Blackbird
Agelasticus thilius
Yellow-winged Blackbird
01-06-13 © J. Simón Tagtachian
Golden-crowned Warbler
Basileuterus culicivorus
Golden-crowned Warbler
01-06-13 © J. Simón Tagtachian
Red-crested Cardinal
Paroaria coronata
Red-crested Cardinal
01-06-13 © J. Simón Tagtachian
Chalk-browed Mockingbird
Mimus saturninus
Chalk-browed Mockingbird
01-06-13 © Jorge Talkowski
Green-barred Woodpecker
Colaptes melanochloros
Green-barred Woodpecker
01-06-13 © Amelia Besana
Dark-faced Ground-Tyrant
Muscisaxicola maclovianus
Dark-faced Ground-Tyrant
01-06-13 © Ariel Méndez Zébè

Birds registered in the survey of June, 2013 Survey June 2013 Non Passeriformes Survey June 2013 Passeriformes

Works to refill the ponds
Fotos © J. Simón Tagtachian This board makes a long-awaited announcement public: Water comes back to the ponds

Some photos of last month
Many-colored Chaco Finch
Saltatricula multicolor
Many-colored Chaco Finch
11-05-13 © Martín Arregui

This bird inhabits the northern center of the country. It was seen in the Middle. There was only one record dating back many years ago

White-tipped Dove
Leptotila verreauxi
White-tipped Dove
18-05-13 © J. Simón Tagtachian
Rusty-collared Seedeater
Sporophila collaris
Rusty-collared Seedeater
25-05-13 © Pablo Serur
Rusty-collared Seedeater
25-05-13 © Pablo Serur
Sharp-billed Canastero
Asthenes pyrrholeuca
Sharp-billed Canastero
25-05-13 © Pablo Serur

Timid. Always hidden in the vegetation. 

Blue-and-yellow Tanager
Pipraeidea bonariensis
Blue-and-yellow Tanager
25-05-13 © Pablo Mosto

Ivory
Eunica eburnea
Satinada Grande/Ivory© Silvia Vitale

Black birds

Aves negras/Black birdsClic on photo for explanation

First photos of the survey
Sayaca Tanager
Thraupis sayaca
Sayaca Tanager
01-06-13 © Amelia Besana
Common Gallinule
Gallinula galeata
Common Gallinule
01-06-13 © J. Simón Tagtachian
European Starling
Sturnus vulgaris
European Starling
01-06-13 © Nicolás Giorgio
White-lined Tanager
Tachyphonus rufus
White-lined Tanager
01-06-13 © J. Simón Tagtachian

Showing its white undercover feathers which are not frequently seen

White-tufted Grebe
Rollandia rolland
White-tufted Grebe
01-06-13 © J. Simón Tagtachian
Pied-billed Grebe
Podilymbus podiceps
Pied-billed Grebe
01-06-13 © J. Simón Tagtachian
Green-winged Saltator
Saltator similis
Green-winged Saltator
01-06-13 © Nicolás Giorgio
Tropical Parula
Setophaga pitiayumi
Tropical Parula
01-06-13 © Nicolás Giorgio
Unicolored Blackbird
Agelasticus cyanopus
Unicolored Blackbird
01-06-13 © J. Simón Tagtachian
Great Egret
Ardea alba
Great Egret
01-06-13 © J. Simón Tagtachian

With snowy egret on the left


Bird survey in the reserve -Saturday, 1st of June On Saturday, 1st a new bird survey was carried out. Five groups simultaneously surveyed the whole premises which were dividida in routes. The provisional result counted 78 birds during the morning. It is still to be counted those seen during the afternoon. Unluckily some of the winter residents which have already arrived at the reserve were not spotted. In the photos some survey participants