Dietary biology of the Eurasian eagle-owl
In the Iberian peninsula, the Eurasian eagle-owl is part of a complex guild of predators that have evolved to survive mostly on European rabbits. Among this guild, golden eagles ("Aquila chrysaetos") were recorded per one study to rely on rabbits for 40% of the diet, the eagle-owl for 49% of the diet, the Spanish imperial eagle ("Aquila adalberti") for 50% of the diet, the Bonelli's eagle ("Aquila fasciata") for 61% of the diet and the Iberian lynx ("Lynx pardinus") for 79% of the diet. Elsewhere, the Spanish imperial eagle and eagle-owl are considered to outflank the golden and even the Bonelli's eagle as the most specialized avian predator of rabbits in the Iberian region. Other predators, such as common buzzard ("Buteo buteo"), northern goshawk ("Accipiter gentilis") black kite ("Milvus migrans") Iberian wildcat ("Felis silvestris tartessia"), red fox, stone marten ("Martes foina") and introduced Egyptian mongoose also prey heavily on rabbits in Spain, but are more generalized and less reliant than the above predators. All these powerful predators do not generally compete directly for food but conflicts may ensue over the rights to territories and nesting sites amongst the birds. Being nocturnal in activity, however, the Eurasian eagle-owl does not tend to compete as directly as do the three eagle species and even these are discreetly segregated by habitat preferences, the goldens preferring open, steep cliffs, the Bonelli's favoring densely vegetated areas mixed with rocky spots and the imperial favoring relatively flat open woodlands. Among these eagles, the golden eagle tends to have the most similar habitat preferences to the Eurasian eagle-owl and across a broad band of overlapping distribution, the two are considered nearly ecological equivalents by day and night. However, good-sized female golden eagles are up to twice as heavy as an average eagle-owl, so seem to have a considerable advantage in size and power. Conversely, to support their large size and large territory needs, the golden eagle cannot survive on small and diverse prey nearly as successfully as the eagle-owl. Among the Iberian peninsula rabbit-eating guild, the species with wider ranges, the eagle-owl and the golden and Bonelli's eagles, have had some degree of success living off of alternate prey following the devastation of the rabbit population due to rabbit haemorrhagic disease. The two rabbit predators endemic to Iberia, the Iberian lynx and Spanish imperial eagle, have been devastated by the reduction and other causes and both are threatened species today.
European badger
Badgers prey on rabbits throughout the year, especially during times when their young are available. They catch young rabbits by locating their position in their nest by scent, then dig vertically downwards to it. In mountainous or hilly districts, where vegetable food is scarce, badgers rely on rabbits as a principal food source. Adult rabbits are usually avoided, unless they are wounded or caught in traps. They consume them by turning them inside out and eating the meat, leaving the inverted skin uneaten. Hedgehogs are eaten in a similar manner. In areas where badgers are common, hedgehogs are scarce. Some rogue badgers may kill lambs, though this is very rare; they may be erroneously implicated in lamb killings through the presence of discarded wool and bones near their setts, though foxes, which occasionally live alongside badgers, are often the culprits, as badgers do not transport food to their earths. They typically kill lambs by biting them behind the shoulder. Poultry and game birds are also taken only rarely. Some badgers may build their setts in close proximity to poultry or game farms without ever causing damage. In the rare instances in which badgers do kill reared birds, the killings usually occur in February–March, when food is scarce due to harsh weather and increases in badger populations. Badgers can easily breach bee hives with their jaws, and are mostly indifferent to bee stings, even when set upon by swarms.