Please pay attention to bibliographical information and the Spanish summary of the following article written by Beatriz Yáñez and others. It concerns presence of Invertebrates in diet of Short-toed Eagle in the Gibraltar region /map/:
• Beatriz Yáñez, Antonio-Román Muñoz, Miguel Ferrer, 2013 – Invertebrates as Prey of Short-toed Snake-Eagles (Circaetus gallicus) // Journal of Raptor Research, 47(3): P. 320-323.