How big can a Eurasian eagle-owl get?
Eurasian eagle-owl
As a highly opportunistic predator, the Eurasian eagle-owl will hunt almost any appropriately sized prey they encounter. Most often they take what ever prey is locally common and can take a large number of species considered harmful to human financial interests such as rats, mice and pigeons. Eurasian eagle-owls do take rare or endangered species as well. Among the species considered at least vulnerable (up to critically endangered as in the mink and eel, both heavily overexploited by humans) to extinction known to be hunted by Eurasian eagle-owls are Russian desman (Desmana moschata)[108] Pyrenean desman (Galemys pyrenaicus),[109] barbastelle (Barbastella barbastellus),[110] European ground squirrel (Spermophilus citellus),[111] southwestern water vole (Arvicola sapidus),[112] European mink (Mustela lutreola),[113] marbled polecat (Vormela peregusna),[108] lesser white-fronted goose (Anser erythrops),[114] Egyptian vulture (Neophron percnopterus),[115] greater spotted eagle (Clanga clanga),[116] eastern imperial eagle (Aquila heliaca),[116] saker falcon (Falco cherrug),[117] houbara bustard (Chlamydotis undulata),[108] great bustard (Otis tarda),[114] spur-thighed tortoise (Testudo graeca),[118] Atlantic cod (Gadus morhua),[119] European eel (Anguilla anguilla)[119] and lumpfish (Cyclopterus lumpus).[119]