News - December 2013
Works at Brasil end![]() |
New moth species
Nest building, new families and kids growing
A chick of another family
A far too agressive pied-billed Grebe. The first victim was a solitary White-tufted Grebe. Then it split a family of White-tufted Grebes with chicks and finally, it was a pair of Silver Teal. To chase them out of the territory it seems to activate the outboard motor, it rises and skitters on the water with open wings. When the opponent crosses the border it lands on the water
El sábado estaba la pareja. El domingo había uno solo
Expecting, nursery and more juveniles
The same nest. In the photo the father in the video the mother feeding the chick
21-12-13 © Amelia Besana
Weeding works ![]() ![]() |
Costanera's nursery and more juveniles
Small-billed Elaenia
Elaenia parvirostris
14-12-13 © Cora Rimoldi
Pekin Duck Anas platyrhynchos domesticus ![]() Domesticated species living in the wild again |
Duckling scouts
08-12-13 © Carlos González Ledo
Out of the grasses which surround the water tank this Indian file came out apparently with a broken compass. They crossed the plant nursery in an opposite direction to the river, that is they were walking towards the street. Finally they got in the vegetation again with a very uncertain destination. The yellow-billed teal nests in tree holes and when ducklings are ready they fall to the ground.
The Neotropic Cormorant belongs in the family Phalacrocoracidae. Up to 2010 this family together with the families Phaethontidae, Fregatidae, Pelecanidae, Anhingidae and Sulidae were included within the Order Pelecaniformes. One morphological characteristic bonded them all. All of them and only they have the four toes palmated. There are other families with palmated toes such as ducks, but they have only three out of the four toes palmated, remaining one of them free. However, genetic studies have shown that they are not so close as they were believed to be and these families have been rearranged as follows. The Phaetontidae (tropical brids not found in Argentina) were isolated in the Order Phaethontiformes. The Pelecanidae (pelicans, neither in Argentina) remained in the Pelecaniformes and the four remaining ones Fregatidae (fregatebird), Sulidae (boobies), Anhingidae (anhinga) and Phalacrocoracidae (cormorant), have been placed into a new order named Suliformes. These four families are represented in Argentina and but for boobies we have records of the other three in Costanera.