Well, this is the last one for this season. We already have with us the last one of the Bonelli’s Eagles born in captivity in 2015. To bring him home, we have travelled recently to the breeding centre specialized in this species in Ardèche (France), where Jean-Claude Mourgues and his family and friends received us with open arms.


Pablo Izquierdo, responsible of the captivity breeding department of GREFA, and Jean-Claude Mourgues, coordinator of the breeding center of Bonelli’s Eagles in Ardèche (France), with a chick born there.


The tagging of wildlife species is a very useful tool in order to eavaluate different parameters of the ecology of endangered species, from the use of space and the choice of where to reproduce, to the reasons of mortality, preadult and adult survival etc...


Photo of the team during tagging.


On Monday June 1, two new chicks of Bonelli’s Eagle arrived in Navarre, Ardenne and Craonne, two males bred also by Christian Pacteau, another addition to the already numerous group which will be set free by hacking in Mallorca, Madrid, Navarre and Álava. Thus, Ardenne y Craonne team up with Babil, Sielva and Artois, being now five specimen which will be set free in Navarre in 2015.


Photo of the team before introducing the eagles in the nest.


Owing to satellite monitoring of the birds released in the Life Bonelli Project, we know that some of them ventured within the territory of the only spawning pair formed in the Tramuntana Mountains of Mallorca (the female Bel and the male Vent). It is a risky manoeuvre since the Bonelli’s Eagles defend tenaciously their territory against others of their species. In this respect, direct observations are much more interesting than the “cold” GPS tracking since they help us to know more about the behaviour of the birds. Here are two examples.


Dalía on October 2, 2014, in her dispersion area, when she already had one feather broken (the sixth secondary) in her left wing, surely diving down for a prey ending up between branches or bushes. Photo: Javi Quintana / GORA.


Escorca, a Bonelli’s Eagle born during the present breeding season, has grown a lot and is about to fly for the first time away from the nest. On May 15, a team of Life Bonelli and the Ministry of Agriculture, Food Quality and Nature (Magrama) descended to the nest in the Tramuntana Mountains of Mallorca to collect biological samples and mark her.


Escorca is fed by her mother. We can appreciate the large size of the chick compared with the adult female. Photo: Ernesto Álvarez / GREFA.


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