Exploring the relationship between a species and the features of the ecosystem in which it occurs is fundamental in conservation and biodiversity management. Sustaining biodiversity requires knowledge about its geographical distribution and pattern, as well as an understanding of the processes which are driving biodiversity at different scales. To create conservation strategies for a species such as the Short-toed Eagle (Circaetus gallicus), a migratory raptor whose distribution throughout north, west and central Europe has seriously declined, wildlife managers need to know environmental requirements and geographical distributions. This MSc. dissertation, therefore, aims to develop a model of the probability of occurrence of the Short-toed Eagle in relation to environmental parameters and potential food availability.