| Hepatic Tanager Piranga flava |
 FemaleThe Hepatic Tanager also found a place in the classification. The mithocondrial DNA analysis were conclusive in that the Hepatic Tanager belongs in the Cardinalidae, though it seems strange to see it together with the grosbeaks with such prominent bills. © Pablo Serur |
| White-tipped Plantcutter Phytotoma rutila |
 Female© J. Simón Tagtachian |
| White-browed Blackbird Sturnella superciliaris |
 Taken en 2011© Ariel Méndez Zébè |
| Black-capped Warbling-Finch Poospiza melanoleuca  Female© J. Simón Tagtachian |
Sayaca Tanager Thraupis sayaca  © J. Simón Tagtachian |
| Blue-and-yellow Tanager Pipraeidea bonariensis  Male© J. Simón Tagtachian |
Yellow-billed Cardinal Paroaria capitata  © J. Simón Tagtachian |
| Parasitized caterpillar |
 Ignacio discovered this caterpillar on a trunk of Sapium haematospermum when we got near it looking for a bird. It is well camouflaged and passes unnoticed. The contrasting white coulour of the eggs, which practically “adorned” the whole of it, called our attention. I consulted Ezequiel Núñez Bustos about the caterpillar. Ezequiel considers it to be an Ascalapha odorata, the biggest moth species of Buenos Aires and the eggs would correspond to an ichneumon wasp. (Read the whole article) © Cora Rimoldi |
| Black-necked Swan Cygnus melancoryphus |
 © Claudia y Diego Bastías |
| Black-backed Grosbeak Pheucticus aureoventris |
 © Gustavo Di Giácomo
I thank Gustavo, the author of the photo, for sharing this finding. It was taken during a visit of the Coa La Plata (Observers’ Club) to Costanera Sur in july 2012. This is the third photographic record of this bird so far: one in 2007 and two in 2012 (See other records) . All the photos are of male individuals. |
| White-tufted Grebe Rollandia rolland  © J. Simón Tagtachian |
Neotropic Cormorant Phalacrocorax brasilianus  © J. Simón Tagtachian |
| Gray-necked Wood-Rail Aramides cajaneus  © J. Simón Tagtachian |
Black-and-rufous Warbling-Finch Poospiza nigrorufa  © J. Simón Tagtachian |
| Aerial view of Costanera Sur |
 © Javier Ubiría |
| Long-tailed Reed-Finch Donacospiza albifrons |
 © Pablo Serur |
| American Kestrel Falco sparverius |
 © Pablo Serur |
| Kelp Gull Larus dominicanus |
 The gull strengthening its wing muscles© Carlos González Ledo |
| Gilded Hummingbird Hylocharis chrysura |
 © J. Simón Tagtachian |
| Masked Gnatcatcher Polioptila dumicola |
 Female© J. Simón Tagtachian |
| Butterflies |
 1-Julia Dryas iulia alcionea – 2-Celmis Satyr Ypthimoides celmis – 3-Ithra Crescent Ortilia ithra – 4-Common Yellow Eurema deva deva – 5-Dichrous Skipper Theagenes dichrous – 6-Common Lazy Actinote pellenea – 7-Fiery Skipper Hylephila phileus – 8-Russula Metalmark Emesis russula – 9-Claudina CrescentTegosa claudina – 10-Southern Buckeye Junonia genoveva hilaris © Carlos González Ledo |
| Red-rumped Warbling-Finch Poospiza lateralis © Cora Rimoldi |
| Mottle-cheeked Tyrannulet Phylloscartes ventralis |
 © Pablo Mosto |
| Plush-crested Jay Cyanocorax chrysops |
 Seen in G3© Pablo Serur |
| Hooded Siskin Sporagra magellanica |
 A male breaking the fruit of this ash to extract the seed© Carlos González Ledo |
| Kelp Gull Larus dominicanus |
 This gull is in a recovery area. When it was found it was very weak.© Carlos González Ledo |
| Roadside Hawk Rupornis magnirostris |
 © Carlos González Ledo |
| More photo of the COARECS outing | |
| Yellow-billed Cardinal Paroaria capitata  © C. y T. Di Mauro |
Checkered Woodpecker Veniliornis mixtus  © C. y T. Di Mauro |
| Solitary Black Cacique Cacicus solitarius  © C. y T. Di Mauro |
Harris's Hawk Parabuteo unicinctus  © C. y T. Di Mauro |
| Fiddlewood Citharexylum montevidense  © Silvia Loiacono |
Lantana Lantana camara  © Silvia Loiacono |
| Spix's Spinetail Synallaxis spixi |
 © Pablo Serur |
| Spot-winged Pigeon Patagioenas maculosa |
 © Pablo Serur |
| Golden-crowned Warbler Basileuterus culicivorus |
 © Pablo Serur |
| White-banded Mockingbird Mimus triurus |
|
 © Pablo Serur |
 © Pablo Serur |
| Large Elaenia Elaenia spectabilis |
 Photo taken in January 2013© Pablo Mosto |
| Guava Skipper Phocides polybius phanias  © Ariel Méndez Zébè |
Remus Greenstreak Cyanophrys remus  © Ariel Méndez Zébè |
| Thamnodynastes hypoconia | |
 © Ariel Méndez Zébè |
 © Ariel Méndez Zébè |
| Neotropic Cormorant Phalacrocorax brasilianus |
 © J. Simón Tagtachian |
| First five years of the COARECS | |
 © Dolores Fernández © Gustavo F. BrahamianOn Saturday, 4th we gathered at the reserve to celebrate the first five years of the COARecs (Birdwatcher’s Club of Reserva Costanera Sur). We spent a great day. A huge group shared this walk. Some of the birdwatchers appear in the photos. Below some of the birds |
|
| Ferruginous Pygmy-Owl Glaucidium brasilianum  © C. y T. Di Mauro |
Southern Caracara Caracara plancus  © Gustavo F. Brahamian |
| Creamy-bellied Thrush Turdus amaurochalinus  © Gustavo F. Brahamian |
Green-barred Woodpecker Colaptes melanochloros  © Gustavo F. Brahamian |
| Narrow-billed Woodcreeper Lepidocolaptes angustirostris  © J. Simón Tagtachian |
Moonflower Ipomoea alba  © Dolores Fernández |
