| Happy 2012!
Cora |
| Chotoy Spinetail Schoeniophylax phryganophila A species rarely seen at Costanera. This year the chotoy visited us and stayed to breed. The nest was very well camouflaged among the branches of an Acacia caven and covered with climbing plants on top. This “I want to be invisible” behaviour did not let us see much. Its brownish color and its distracting behaviour to go into or out of the nest made the follow up even more difficult. We did not see it leave and, all of a sudden, in it went. The movement of its long tail let us spot it. Some jumps from one branch to another and it got lost in the denseness. It moved so quickly that the video was slowed down to a quarter of the velocity and the bird encircled to be easily visualized. How many chicks? We do not know, but it made several trips to get food. Video © Roberto Ares – Text: Cora Rimoldi |
| Solitary Black Cacique Cacicus solitarius  The nest on the left already has chicks, but at the back there is another nest…© Carlos Gonzalez Ledo |
Red-eyed Vireo Vireo olivaceus  © Carlos Gonzalez Ledo |
| Glittering-bellied Emerald Chlorostilbon aureoventris |
 Male© Pablo Serur |
| Más registros viejos, especies nuevas para el sitio Individuos liberados o escapados |
| Eurasian Collared Dove Streptopelia decaocto  circa 2000 © Roberto Güller |
| Zebra Finch Taeniopygia guttata  circa 2000 © Roberto Güller |
| Rufous Hornero parasitized by Shiny Cowbird Furnarius rufus – Molothrus bonariensis Every year we find Shiny cowbird chicks being fed by foster parents. This video shows the Rufous Hornero, but other eight species have been recorded photographically at Costanera. See Species parasitized by Shiny Cowbird 11-2011 © Javier Menendez |
| White-winged Becard Pachyramphus polychopetrus |
 Male© Pablo Serur |
| Scarlet-headed Blackbird Amblyramphus holosericeus |
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 10-10-11 © J. S. Tagtachian |
 10-10-11 © J. S. Tagtachian |
 The nest in two stages. Halfway during construction the blackbird is tightening fibres and in the nest15-10-11 © J. S. Tagtachian |
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| Sayaca Tanager Thraupis sayaca  © J. Simón Tagtachian |
Scissor-tailed Nightjar Hydropsalis torquata  © J. Simón Tagtachian |
| On the evening outing of 17th organized by RECS we saw the Scissor-tailed Nightjar and the Sayaca Tanager among other birds. As soon as we went in a heterogeneous group of birds were enjoying a bath in some pools of water on the Lizards Path. By the time we watched the nightjar it was almost dark and flash was not allowed to be used. Anyway the pair of nightjars did not seem to be worried by our presence and we stayed long watching them. They performed acrobatic raids in the air to engulf insects. But the male (bottom) exhibited a curious behaviour. It positioned parallel and head to head to the female, jumped and fell in the same place but looking backwards, then again to the head-to-head poisition. It repeated this figure another couple of times and they both flew away. Courtshipping? | |
| Old records, new bird species to the site Released or escaped individuals |
| Tropical Pewee Contopus cinereus  circa 2000 © Roberto Güller |
| Many-colored Chaco-Finch Saltatricula multicolor  circa 2000 © Roberto Güller |
| Orange-backed Troupial Icterus croconotus  © J. Simón Tagtachian |
Small-billed Elaenia Elaenia parvirostris  © Carlos Gonzalez Ledo |
| Rufous Hornero Furnarius rufus  Almost caught© Carlos Gonzalez Ledo |
Solitary Cacique Procacicus solitarius  Nest© Carlos Gonzalez Ledo |
| Chalk-browed Mockingbird Mimus saturninus  Very little chicks© Carlos Gonzalez Ledo |
Red-crested Cardinal Paroaria coronata  Juvenile© Carlos Gonzalez Ledo |
| Grayish Baywing Agelaioides badius  Feeding chick© Carlos Gonzalez Ledo |
Checkered Woodpecker Veniliornis mixtus  Feeding chick© Roberto Ares |
| Great Kiskadee Pitangus sulphuratus  Waiting for a bit© Roberto Ares |
Golden-billed Saltator Saltator aurantiirostris  This juvenile already feeds by itself© Roberto Ares |
| Scarlet-headed Blackbird Amblyramphus holosericeus  © Carlos Gonzalez Ledo |
Bran-colored Flycatcher Myiophobus fasciatus  © Roberto Ares |
| Eared Dove Zenaida auriculata  Some are still courtshiping© Carlos Gonzalez Ledo |
Eared Dove Zenaida auriculata  Reusing a mockingbird’s nest© Cora Rimoldi |
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