Please take a look at the following RG links and a PDF attachment.

Article Synthesis of 312 Studies on the Diet of the Long-Eared Owl Asio otus

Article Diet of the Long-eared Owl, Asio otus, in Central Anatolia (...

Article Fish in the diet of the Long-eared Owl Asio otus

Article Diet of a nesting pair of Long-eared Owls, Asio otus, in an ...

Article Diet composition, prey choice, and breeding success of Long-...

Article Winter diet composition of urban long-eared owls (Asio otus)...

Article Small mammals in the diets of the Long-eared Owl (Asio otus)...

Article Evidence of carrion consumption behaviour in the long-eared ...

Article Seasonal variability in the diet of the long-eared owl Asio ...

From my own observations in the forest of the Jura most Asio otus are feeding on small rodents and rarely on birds

Please also go through the following RG links.

Article Diet composition of the Long-eared Owl (Asio otus) during th...

Article Seasonal variation in the diet of the long-eared owl (Asio o...

Article The Comparison of the Winter Diet of Long-Eared Owl Asio otu...

Article Density, diet and productivity of Long-eared Owls Asio otus ...

Article Winter Diet of Long-eared Owls, Asio otus (L.), in a Suburba...

Article Winter Diet of Long-eared Owl Asio otus in a Mediterranean F...

Article Winter diet of Long-eared Owls Asio otus in the Ebro valley ...

Article Investigation on Diet of Long-Eared Owl (Asio Otus) Inhabiti...

Article Diet Composition of the Long-eared Owl (Asio otus) in the Ea...

Article Changes in the diet of long-eared owl Asio otus: seasonal pa...

Article Effect of season, weather and habitat on diet variation of a...

Article Small mammals in the diet of the Long-eared Owl, Asio otus ,...

Article Diet of Wintering Long-Eared Owl Asio otus in Zabol, Southeastern Iran

Article COMPOSITION OF THE WINTER DIET OF THE LONG-EARED OWL ASIO OT...

Thank you all for your help.