Over the "geese hill"

Cerro de los Ánsares / Over the "geese hill" from eb7dln on Vimeo.

During the months of December, January and February we made ​​a total of 23 flights on the "Cerro de los Ansares" located in the south of the Doñana Natural Area. Greylag geese, which feed mostly on the roots of an aquatic plant of the marshes called castañuela, concentrate every sunrise in the dunes to ingest sand to grind food and facilitate digestion.
The aim of these overflights was the location of the flocks of geese to study the use they make of the dune.