Acknowledgments

Over the years many people has contributed in different ways, among them we are particularly indebted to Jon Fjeldså, Geracin Burachoff, Alejandro Serret, Mauricio Rumboll, James Lowen, Silvina Sturzenbaum, Pablo Hernandez, Mariano Bertinat, Mariana Martinez, Lorena Martinez, Pablo Rosso, Diego Punta Fernandez, Fabricio Segovia, Luciano Bernacchi, Edith Rodríguez, Martina Mc Mamara, Andrea Pigazzi, Andrés Bosso, James Lowen, Yayoi Sato, Germán Pugnali, Rob Clay, Julio Lancelotti, Adrián Di Giacomo and Juan Mazar Barnett. A very special thanks to all the farmers and farm workers who greatly helped out when we visited the desolated areas where the grebe lives.

Andrés Johnson was fundamental for the species and for us, a special thank to you, wherever you are.

Most of the recent work on the species has been done thanks to the support of www.ambientesur.org.ar