Reserva Ecológica Costanera Sur

Sitio realizado por aficionados a la observación de aves desde 10 de enero 2006

Pied-billed Grebe - Podilymbus podiceps

Order: Podicipediformes - Family: Podicipedidae
Status: Resident - Frequent - Breeder. Habitat:Ponds


All the records since January 2014

Sounds

© José L. Merlo

© Diego Caiafa

© Dolores Fernández
 

17-10-15 © Cora Rimoldi

Adulto
Macá pico grueso/Pied-billed Grebe7 15 © Dolores Fernández
Basic or non-breeding plumage
: Dark brown. Ventrally lighter. Thick bill lacking black ring. Witish throat. Lobed feet
Macá pico grueso/Pied-billed Grebe8 15 © Sergio Cusano
Changing into alternate plumage
Macá pico grueso/Pied-billed Grebe8 14 © Sergio Cusano
Alternate or nuptial plumage
: Darker. Bill with black ring. Black throat and white eye-ring
Macá pico grueso/Pied-billed Grebe7 06 © Alberto Gurni

Breeding
The Pied-billed Grebe is a bird of solitary habits. A skillful diver appears and disappears as if by magic. This species has no sexual dimorphism: male and female have the same appearance. Two diagnostic features of the plumage in breeding season: a black throat and a contrasting black band around the light bill.
Some adults were spotted, but there was no sign of courtship behaviour. Only voices were heard.
Macá pico grueso/Pied-billed Grebe© Roberto Ares
© Dolores Fernández
Macá pico grueso/Pied-billed Grebe11 13 © J. Simón Tagtachian

Both adults share the task of building the nest. It is built in shallow water inside the feeding territory. It is a mound of vegetal material on the ground or anchored to plants. It is very simple and camouflages well. Nests have direct access to water, where grebes will spend their lives.
Macá pico grueso/Pied-billed Grebe© Roberto Ares Macá pico grueso/Pied-billed Grebe© Roberto Ares
Macá pico grueso/Pied-billed Grebe© Roberto Ares Macá pico grueso/Pied-billed Grebe© J. Simón Tagtachian

Both incubate the eggs. Here, the change of guard and a thorough revision of the nest before sitting on eggs.
22 9 07 © Roberto Ares

Macá pico grueso/Pied-billed GrebeParental care. A case study
10 2007 © Roberto Ares

Young
Macá pico grueso/Pied-billed Grebe26 12 15 © J. Simón Tagtachian Macá pico grueso/Pied-billed Grebe1 14 © J. Simón Tagtachian
Macá pico grueso J/Pied-billed Grebe J10 2 14 © Victoria Mansilla Macá pico grueso/(Pied-billed Grebe23 1 16 © Sergio Cusano
Macá pico grueso/Pied-billed Grebe3 15 © Claudia y Diego Bastías Macá pico grueso/Pied-billed Grebe12 14 © Eduardo Ibarra

Diet
Macá pico grueso/Pied-billed Grebe© Nicolás Giorgio Macá pico grueso/Pied-billed Grebe© J. Simón Tagtachian
Macá pico grueso/Pied-billed Grebe© J. Simón Tagtachian
Macá pico grueso/Pied-billed Grebe© J. Simón Tagtachian

More photographic records since January 2013