News - December 2018

Felices fiestas 2019

New moth: Gaudy sphynx
Eumorpha labruscae
Gusano de la parra/Gaudy sphinx
22-12-18 © María Victoria Di Stasio
This moth belongs in the family Sphingidae, subfamily Macroglossinae. It is nocturnal and feeds on grapevines, 
Gusano de la parra/Gaudy sphinx
22-12-18 © Héctor García
Gusano de la parra/Gaudy sphinx
22-12-18 © María Victoria Di Stasio
Marcelo discovered this caterpillar crossing the road and called us. An impressive size. At fist sight some 10 cm. The coin serves as a reference. We surrounded it so as to keep it safe from passers-by or cyclists till the edge of the road.
Gusano de la parra/Gaudy sphinx
22-12-18 © Héctor García
Gusano de la parra/Gaudy sphinx
22-12-18 © Javier González

Picazuro Pigeon
Patagioenas picazuro
30-12-18 © Sergio Cusano
Common Gallinule
Gallinula galeata
30-12-18 © Héctor García
30-12-18 © Sergio Cusano
30-12-18 © Sergio Cusano
Rosy-billed Pochard
Netta peposaca
30-12-18 © Sergio Cusano
30-12-18 © Héctor García
Spot-winged Pigeon
Patagioenas maculosa
30-12-18 © Sergio Cusano
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
30-12-18 © Sergio Cusano
Brazilian Teal
Amazonetta brasiliensis
30-12-18 © Héctor García
30-12-18 © Héctor García
Limpkin
Aramus guarauna
30-12-18 © Sergio Cusano
Yellow-billed Cardinal
Paroaria capitata
30-12-18 © Sergio Cusano
Mallard Duck
Anas platyrhynchos
30-12-18 © Héctor García
Monk Parakeet
Myiopsitta monachus
30-12-18 © Héctor García
30-12-18 © Sergio Cusano
Chestnut-capped Blackbird
Chrysomus ruficapillus
30-12-18 © Sergio Cusano

Hensel's swamp frog
Pseudopaludicola falcipes
23-12-18 © Román Montero
Belongs in the family Leiuperidae, though many authors consider it a subfamily in the Leptodactylidae family. It is a very small frog (approx. 2 cm). Difficult to see but easily heard. It frequents grasslands or plantations. It is well adapted to disturbed areas
23-12-18 © Román Montero

Plush-crested Jay
Cyanocorax chrysops
Urraca común/Plush-crested Jay
23-12-18 © Javier González
Urraca común/Plush-crested Jay
23-12-18 © Javier González
Ferruginous Pygmy-Owl
Glaucidium brasilianum
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Gustavo Brahamian
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Gustavo Brahamian
Anillado
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Gustavo Brahamian
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Gustavo Brahamian
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Javier González
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Javier González
Streaked Flycatcher
Myiodynastes maculatus
Benteveo rayado/Streaked Flycatcher
23-12-18 © Javier González
Checkered Woodpecker
Veniliornis mixtus
Carpintero bataraz chico/Checkered Woodpecker
23-12-18 © Javier González
White-eyed Parakeet
Psittacara leucophthalmus
Calancate ala roja/White-eyed Parakeet
23-12-18 © Román Montero
Sooty-fronted Spinetail
Synallaxis frontalis
Pijuí frente gris/Sooty-fronted Spinetail
23-12-18 © Román Montero
Ultramarine Grosbeak
Cyanoloxia brissonii
Reinamora grande/Ultramarine Grosbeak
23-12-18 © Román Montero
Reinamora grande/Ultramarine Grosbeak
23-12-18 © Javier González
Fork-tailed Flycatcher
Tyrannus savana
Tijereta/Fork-tailed Flycatcher
23-12-18 © Javier González
Tijereta/Fork-tailed Flycatcher
23-12-18 © Román Montero

Red-eyed Vireo
Vireo olivaceus
Chiví común/Red-eyed Vireo
22-12-18 © Javier González
Spot-winged Pigeon
Patagioenas maculosa
Paloma manchada/Spot-winged Pigeon
22-12-18 © Héctor García
Yellow-browed Tyrant
Satrapa icterophrys
Suirirí amarillo/Yellow-browed Tyrant
22-12-18 © Javier González
Fork-tailed Flycatcher
Tyrannus savana
Tijereta/Fork-tailed Flycatcher
22-12-18 © Javier González
Roadside Hawk
Rupornis magnirostris
Taguató común/Roadside Hawk
22-12-18 © Héctor García
Taguató común/Roadside Hawk
22-12-18 © Javier González
Greyish Baywing
Agelaioides badius
Tordo músico/Greyish Baywing
22-12-18 © Héctor García
Double-collared Seedeater
Sporophila caerulescens
Corbatita común/Double-collared Seedeater
22-12-18 © Javier González
Glittering-bellied emerald
Chlorostilbon lucidus
Picaflor común/Glittering-bellied emerald
22-12-18 © Héctor García
Tropical Kingbird
Tyrannus melancholicus
Suirirí real/Tropical Kingbird
22-12-18 © Javier González

Cattle Egret
Bubulcus ibis
Garcita bueyera/Cattle Egret
15-12-18 © Javier González
Small-billed Elaenia
Elaenia parvirostris
Fiofío pico corto/Small-billed Elaenia
15-12-18 © Javier González
Southern Screamer
Chauna torquata
Chajá/Southern Screamer
15-12-18 © Javier González
Black-capped Warbling-Finch
Microspingus melanoleucus
Monterita cabeza negra/Black-capped Warbling-Finch
15-12-18 © Javier González
Spectacled Tyrant
Hymenops perspicillatus
Pico de plata/Spectacled Tyrant
15-12-18 © Javier González
Bran-colored Flycatcher
Myiophobus fasciatus
Mosqueta estriada/Bran-colored Flycatcher
15-12-18 © Javier González
House Sparrow
Passer domesticus
Gorrión/House Sparrow
15-12-18 © Javier González

Plush-crested Jay
Cyanocorax chrysops
Urraca común/Plush-crested Jay
23-12-18 © Román Montero
Urraca común/Plush-crested Jay
23-12-18 © Lucas de Ciria
Urraca común/Plush-crested Jay
23-12-18 © Lucas de Ciria
Ferruginous Pygmy-Owl
Glaucidium brasilianum
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Lucas de Ciria
Caburé chico/Ferruginous Pygmy-Owl
23-12-18 © Román Montero
Dusky-legged Guan
Penelope obscura
Pava de monte común/Dusky-legged Guan
23-12-18 © Sally Dietrich
En esta foto hay dos pavas de monte. Sally vio dos más, pero no sabe si son las mismas.
Pava de monte común/Dusky-legged Guan
23-12-18 © Román Montero
Pava de monte común/Dusky-legged Guan
23-12-18 © Lucas de Ciria
Streaked Flycatcher
Myiodynastes maculatus
Benteveo rayado/Streaked Flycatcher
23-12-18 © Lucas de Ciria
Benteveo rayado/Streaked Flycatcher
23-12-18 © Román Montero
Double-collared Seedeater
Sporophila caerulescens
Corbatita común/Double-collared Seedeater
23-12-18 © Lucas de Ciria
Golden-billed Saltator
Saltator aurantiirostris
Pepitero de collar/Golden-billed Saltator
23-12-18 © Lucas de Ciria

Magnificent Frigatebird
Fregata magnificens
Ave fragata/Magnificent Frigatebird
16-12-18 © Silvia Loiacono
Ave fragata/Magnificent Frigatebird
16-12-18 © Silvia Loiacono
Ave fragata/Magnificent Frigatebird
16-12-18 © Silvia Loiacono
Fork-tailed Flycatcher
Tyrannus savana
Tijereta/Fork-tailed Flycatcher
16-12-18 © Carlos González Ledo
Hooded Siskin
Spinus magellanicus
Cabecitanegra común/Hooded Siskin
16-12-18 © Carlos González Ledo
Double-collared Seedeater
Sporophila caerulescens
Corbatita común/Double-collared Seedeater
16-12-18 © Carlos González Ledo
Common Gallinule
Gallinula galeata
Pollona negra/Common Gallinule
16-12-18 © Carlos González Ledo

Small-billed Elaenia
Elaenia parvirostris
Fiofío pico corto/Small-billed Elaenia
15-12-18 © Héctor García
Spectacled Tyrant
Hymenops perspicillatus
Pico de plata/Spectacled Tyrant
15-12-18 © Héctor García
Ringed Teal
Callonetta leucophrys
Pato de collar/Ringed Teal
15-12-18 © Héctor García
Tropical kingbird
Tyrannus melancholicus
Suirirí real/Tropical kingbird
15-12-18 © Héctor García
Roadside Hawk
Rupornis magnirostris
Taguató común/Roadside Hawk
15-12-18 © Héctor García
Southern Caracara
Caracara plancus
Carancho/Southern Caracara
15-12-18 © Héctor García

Bird Survey organized by the COARECS - 15 of December, 2018
After a heavy rainfall on Tuesday the reserve opened at 9 a.m.. We were few at the very beginning but after a few hours the number increased. A total of 111 birds were watched.
Observadores censo 15 de diciembre 2018
15-12-18 © J. Simón Tagtachian
Snail Kite
Rostrhamus sociabilis
Caracolero/Snail Kite
15-12-18 © Sergio Cusano
Caracolero/Snail Kite
15-12-18 © Sergio Cusano
Yellow-chinned Spinetail
Certhiaxis cinnamomeus
Curutié colorado/Yellow-chinned Spinetail
15-12-18 © Sergio Cusano
Cuervillo de cañada
Plegadis chihi
Cuervillo de cañada/White-faced Ibis
15-12-18 © Sergio Cusano
Sayaca Tanager
Thraupis sayaca
Celestino/Sayaca Tanager
15-12-18 © Sergio Cusano
Red-crested Cardinal
Paroaria coronata
Cardenal común/Red-crested Cardinal
15-12-18 © Sergio Cusano
Chestnut-capped Blackbird
Chrysomus ruficapillus
Varillero congo/Chestnut-capped Blackbird
15-12-18 © Sergio Cusano
Black-backed Water-Tyrant
Fluvicola albiventer
Viudita blanca/Black-backed Water-Tyrant
15-12-18 © Sergio Cusano

Silver Teal
Anas versicolor
Patoa capuchino/Silver Teal
9-12-18 © Carlos González Ledo
Cocoi Heron
ARdea cocoi
Garza mora/Cocoi Heron
9-12-18 © Carlos González Ledo
Fork-tailed Flycatcher
Tyrannus savana
Tijereta/Fork-tailed Flycatcher
8-12-18 © Javier González
Blue-and-yellow Tanager
Pipraeidea bonariensis
Naranjero/Blue-and-yellow Tanager
8-12-18 © Javier González
Green-barred Woodpecker
Colaptes melanochloros
Carpintero real/Green-barred Woodpecker
8-12-18-18 © Javier González
Brown-chested Martin
Progne tapera
Golondrina parda/Brown-chested Martin
8-12-18-18 © Javier González
Double-collared Seedeater
Sporophila caerulescens
Corbatita común/Double-collared Seedeater
8-12-18-18 © Javier González
Chalk-browed Mockingbird - Black-and-white Tegu Lizard
Mimus saturninus - Salvator merianae
Calandria-lagarto/Mockingbird-Tegu Lizard
8-12-18-18 © Javier González
Calandria-lagarto/Mockingbird-Tegu Lizard
8-12-18-18 © Javier González
The mockingbird fears nobody, no matter its size

Peregrine Falcon
Falco peregrinus
Halcón peregrino/Peregrine Falcon
2-12-18 © Javier González
Halcón peregrino/Peregrine Falcon
2-12-18 © Javier González
Ultramarine Grosbeak
Cyanoloxia brissonii
Reinamora grande/Ultramarine Grosbeak
2-12-18 © Javier González
Wood Stork
Mycteria americana
Tuyuyú/Wood Stork
2-12-18 © Javier González
Checkered Woodpecker
Veniliornis mixtus
Carpintero bataraz chico/Checkered Woodpecker
2-12-18 © Javier González
Young
Small-billed Elaenia
Elaenia parvirostris
Fiofío pico corto/Small-billed Elaenia
2-12-18 © Carlos González Ledo
Yellow-browed Tyrant
Satrapa icterophrys
Suirirí amarillo/Yellow-browed Tyrant
2-12-18 © Carlos González Ledo
Gilded Sapphire
Hylocharis chrysura
Picaflor bronceado/Gilded Sapphire
2-12-18 © Javier González
En barba de chivo Caesalpinia gilliesii
White-tipped Dove
Leptotila verreauxi
Yerutí común/White-tipped Dove
2-12-18 © Javier González
Silver Teal
Anas versicolor
Pato capuchino/Silver Teal
2-12-18 © Javier González
Glittering-bellied Emerald
Chlorostilbon lucidus
Picaflor común/Glittering-bellied Emerald
2-12-18 © Javier González
At blue anise sage Salvia guaranitica
White-rumped Swallow
Tachycineta leucorrhoa
Golondrina ceja blanca/White-rumped Swallow
2-12-18 © Javier González
Golden-crowned Warbler
Basileuterus culicivorus
Arañero coronado chico/Golden-crowned Warbler
2-12-18 © Javier González
Tropical Parula
Setophaga pitiayumi
Pitiayumí/Tropical Parula
2-12-18 © Javier González

Two swarms
Within a few days a swarm of bees and another of ants were captured. Both bees and ants belong to the Order Hymenoptera and have evolved from wasps (also in that Order). Commonly we call swarm to a massive group of insects. Anyway, there are other characteristics which are associated to the reproductive function and the beginning of a new colony.
Enjambre de hormigas/ Ant Swarm
31-10-18 © J. Simón Tagtachian
In the case of ants a swarm is a cloud of winged males and females which massively get out of the nest for the swarming or nuptial flight. Workers are apterous, wingless, hence they do not take part in the flight. During the swarm females and mates coputate, after which males die and the females will dig a chamber where she will found a new colony. That is why, the swarm takes place after heavy autumn or spring rains when the ground is soft enough for females to dig.
Enjambre de hormigas/ Ant Swarm
31-10-18 © J. Simón Tagtachian
In the case of bees the swarm is formed with a group of bees which separates from an existing colony. This occurs when the colony becomes too crowded and a feeling of discomfort puts the swarm into motion. The bees force the queen to lay eggs in cells prepared by them. Out of these eggs new queens will eclose. Only one of them will keep the colony. The old queen, already carrying eggs, and her followers (a few drones and worker bees) leave the hive with a provision of honey for some days. They fly to a nearest tree where they cluster. They stay there temporarily till the scout bees find the new home.
Enjambre de abejas/ Bee Swarm
28-10-18 © Javier González

censo diciembre 2018

Maroon-bellied Parakeet
Pyrrhura frontalis
Chiripepé cabeza verde/Maroon-bellied Parakeet
9-12-18 © Silvia Sokolovsky

Dusky-legged Guan
Penelope obscura
Pava de monte común/Dusky-legged Guan
8-12-18 © Sergio Cusano
Pava de monte común/Dusky-legged Guan
8-12-18 © Sergio Cusano
Pava de monte común/Dusky-legged Guan
8-12-18 © Sergio Cusano
Out of the blue sometnhing big landed in the middle of the path. It was a dusky-legged guan!!!!!! First it lay on the ground wallowing in dust. A small girl got near and the guan flew to a nearby tree where it stood for a while and finally left.
Southern Screamer
Chauna torquata
Chajá/Southern Screamer
8-12-18 © Sergio Cusano
Chajá/Southern Screamer
8-12-18 © Sergio Cusano
Golden-billed Saltator
Saltator aurantiirostris
Pepitero de collar/Golden-billed Saltator
8-12-18 © Sergio Cusano
Blue-and-yellow tanager
Pipraeidea bonariensis
Naranjero/Blue-and-yellow tanager
8-12-18 © Sergio Cusano
Spot-winged Pigeon
Patagioenas maculosa
Paloma manchada/Spot-winged Pigeon
8-12-18 © Sergio Cusano
White-faced Ibis
Plegadis chihi
Cuervillo de cañada/White-faced Ibis
8-12-18 © Sergio Cusano
The white line on the face can be seen though not very conspicuously
Cuervillo de cañada/White-faced Ibis
8-12-18 © Sergio Cusano
Red-eyed Vireo
Vireo olivaceus
Chiví común/Red-eyed Vireo
8-12-18 © Sergio Cusano
Green-barred Woodpecker
Colaptes melanochloros
Carpintero real/Green-barred Woodpecker
8-12-18 © Sergio Cusano
Streaked Flycatcher
Myiodynastes maculatus
Benteveo rayado/Streaked Flycatcher
8-12-18 © Sergio Cusano
Chestnut-capped Blackbird
Chrysomus ruficapillus
Varillero congo/Chestnut-capped Balckbird
8-12-18 © Sergio Cusano
Varillero congo/Chestnut-capped Balckbird
8-12-18 © Sergio Cusano

Black-backed Water-Tyrant
Fluvicola albiventer
Viudita blanca/Black-backed Water-Tyrant
6-12-18 © J. Simón Tagtachian
Viudita blanca/Black-backed Water-Tyrant
6-12-18 © J. Simón Tagtachian
Maguari Stork
Ciconia maguari
Cigüeña americana/Maguari Stork
6-12-18 © J. Simón Tagtachian
Cigüeña americana/Maguari Stork
6-12-18 © J. Simón Tagtachian
Cigüeña americana/Maguari Stork
6-12-18 © J. Simón Tagtachian
Cigüeña americana/Maguari Stork
6-12-18 © J. Simón Tagtachian
White-faced Ibis
Plegadis chihi
Cuervillo de cañada/White-faced Ibis
6-12-18 © J. Simón Tagtachian
Bare-faced Ibis
Phimosus infuscatus
Cuervillo cara pelada/Bare-faced Ibis
6-12-18 © J. Simón Tagtachian
Harris's Hawk
Parabuteo unicinctus
Gavilán mixto/Harris's Hawk
6-12-18 © J. Simón Tagtachian
Sietevestidos
Poospiza nigrorufa
Sietevestidos/Black-and-rufous Warbling-Finch
6-12-18 © J. Simón Tagtachian
Limpkin
Aramus guarauna
Caraú/Limpkin
6-12-18 © J. Simón Tagtachian
Southern Caracara
Caracara plancus
Carancho/Southern Caracara
6-12-18 © J. Simón Tagtachian

Black Skimmer
Rynchops niger
Rayador/Black Skimmer
Within a numerous group of gulls Simón discovered the skimmer when he saw the photos.
4-12-18 © J. Simón Tagtachian
Rayador/Black Skimmer
4-12-18 © J. Simón Tagtachian
Rayador/Black Skimmer
4-12-18 © J. Simón Tagtachian
Rayador/Black Skimmer
4-12-18 © J. Simón Tagtachian
Rayador/Black Skimmer
4-12-18 © J. Simón Tagtachian
Grey-hooded Gull
Chroicocephalus cirrocephalus
Gaviota capucho gris/Grey-hooded Gull
4-12-18 © J. Simón Tagtachian
In the same group of gulls, the Black Skimmer and a Grey-hooded Gull
Yellow-billed Pintail
Anas georgica
Pato maicero/Yellow-billed Pintail
4-12-18 © J. Simón Tagtachian
With Red-gartered Coots
Red Shoveler
Anas platalea
Pato cuchara/Red Shoveler
4-12-18 © J. Simón Tagtachian
Black-headed Duck
Heteronetta atricapilla
Pato cabeza negra/Black-headed Duck
4-12-18 © J. Simón Tagtachian
The first on the left, then a White-faced Whistling-Duck, then a Yello-billed Teal and another White-faced Whistling-Duck on the right. At the back, a Great Egret
White-tufted Grebe
Rollandia rolland
Macá común/White-tufted Grebe
4-12-18 © J. Simón Tagtachian
White-eyed Parakeet
Psittacara leucophthalmus
Calancata ala roja/White-eyed Parakeet
4-12-18 © J. Simón Tagtachian
Black-necked Stilt
Himantopus mexicanus
Tero real/Black-necked Stilt
4-12-18 © J. Simón Tagtachian
Blue-and-white Swallow
Pygochelidon cyanoleuca
Golondrina barranquera/Blue-and-white Swallow
4-12-18 © J. Simón Tagtachian
Rufescent Tiger-Heron
Tigrisoma lineatum
Hocó colorado/Rufescent Tiger-Heron
4-12-18 © J. Simón Tagtachian
The chick of the Brasil end
Great Kiskadee
Pitangus sulphuratus
Benteveo común/Great Kiskadee
4-12-18 © J. Simón Tagtachian
With a white mulberry in the bill

Last news of November
Hornero parasitzed by Shiny Cowbird
Furnarius rufus - Molothrus bonariensis
Hornero-Tordo renegrido/Hornero-Shiny Cowbird
24-11-18 © Javier González
A fight between a tropical kingbird and another bird called our eye. Later we found it was female shiny cowbird.and assumed it tried to parasitize the kingbird. The cowbird left and the kingbird perched in a tipu tree. We thought the nest could be near and stayed to see if we could spot it. We were no lucky.. But to our surprise in a tipu tree next to it there was a hornero htat had been parasitized by a shiny cowbird. The fledgling claimed for food. Nevertheless when the hornero arrived, it got into the nest or feed its own chicks. On this occasion the cowbird was not lucky. But a few moments later another or the same adult brought him some food.
Hornero-Tordo renegrido/Hornero-Shiny Cowbird
24-11-18 © Javier González
Hornero-Tordo renegrido/Hornero-Shiny Cowbird
24-11-18 © Javier González

Ringed Teal
Callonetta leucophrys
Pato de collar/Ringed Teal
27-11-18 © J. Simón Tagtachian
Yellow-billed Teal
Anas flavirostris
Pato barcino/Yellow-billed Teal
27-11-18 © J. Simón Tagtachian
Southern Screamer
Chauna torquata
Chajá/Southern Screamer
27-11-18 © J. Simón Tagtachian
Chajá/Southern Screamer
27-11-18 © J. Simón Tagtachian
Black-headed Duck
Heteronetta atricapilla
Pato cabeza negra/Black-headed Duck
27-11-18 © J. Simón Tagtachian

Wood Stork
Mycteria americana
Tuyuyú/Wood Stork
24-11-18 © Javier González
Early in the morning a big flock of wood storks flying very high in the sky. A bit later a few maguari storks
Maguari Stork
Ciconia maguari
Cigüeña/Maguari Stork
24-11-18 © Javier González
Black-backed Water-Tyrant
Fluvicola albiventer
Viudita blanca/Black-backed Water-Tyrant
24-11-18 © Javier González
Viudita blanca/Black-backed Water-Tyrant
24-11-18 © Héctor García
Streaked Flycatcher
Myiodynastes maculatus
Benteveo rayado/Streaked Flycatcher
24-11-18 © Javier González
Double-collared Seedeater
Sporophila caerulescens
Corbatita común/Double-collared Seedeater
24-11-18 © Héctor García
Chimango Caracara
Milvago chimango
Chimango/Chimango Caracara
24-11-18 © Héctor García
Checkered Woodpecker
Veniliornis mixtus
Carpintero bataraz chico/Checkered Woodpecker
24-11-18 © Javier González
Golden-billed Saltator
Saltator aurantiirostris
Pepitero de collar/Golden-billed Saltator
24-11-18 © Javier González