INTER-SPECIFIC COMPETITION

 

In circumstances of scarcity of favourable habitats and inconveniences due to the human action, it may appear a factor of a natural kind that affects also the populations of Bonelli´s Eagles: inter-specific competition. So much in relation to the nourishing resources as to the places of nest building, the most direct competitors of the Bonelli´s Eagle are other birds of prey such as the Peregrine Falcon (Falco peregrinus), the Eagle Owl (Bubo bubo) and above all  the Golden Eagle (Aquila chrysaetos). The Goshawk (Accipiter gentilis) presents also a diet similar to that of Bonelli´s Eagle, but it occupies different nesting areas. On the other hand, the Griffon Vulture (Gyps fulvus) does not compete with the eagles for food but they may do it for the places of nest building. The territorial struggles with other species such as the Raven (Corvus corax) and Common Kestrel (Falco tinnunculus) are also frequent.

Golden Eagle (Aquila chrysaetos) (Photo: Vicenç Bros)

Eagle Owl (Bubo bubo) (Photo: Vicenç Bros)

Peregrine Falcon (Falco peregrinus) (Photo: Vicenç Bros)

Griffon Vulture (Gyps fulvus) (Photo: Vicenç Bros)

Though the competition with other raptors species does not explain in itself the widespread decrease of the populations of Bonelli´s Eagle, in certain cases they may have a certain effect when it comes to impeding the reoccupation of territories formerly left. For this reason it is important to avoid the human actions that favour that the eagles end up by leaving their territories.

The best solution to prevent the inter-specific competition effect on the Bonelli´s Eagle is to support healthy populations of the predator. This implies reducing the mortality and preserving habitats rich in preys.

 

Raven (Corvus corax) Click to enlarge the image (Photo: Albert Tintó)

Vultures compete for the breeding areas. Click to enlarge the image (Photo: Albert Tintó)


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