We studied the diets of the barn owl Tyto alba and the long-eared owl Asio otus in an arid region in the northern and central Negev Desert, Israel. The diet of the two owl species consisted mainly of small mammals, but the long-eared owl consumed a significantly larger proportion of birds in all seasons than did the barn owl. Seasonal differences in the proportion of birds in the diet of the long-eared owl were mainly due to the consumption of migratory birds. Diet composition of each of the two species resembled more the diet of its conspecifics from other locations in that region and other seasons rather than that of the other species from the same location or season. This indicates that these two owl species do not consume prey in proportion to its availability, but prefer certain types of prey over others.
Alivizatos H. Goutner V. 1999. Winter diet of the barn owl (Tyto alba) and long eared owl (Asio otus) in northeastern Greece: a comparison. Journal of Raptor Research 33: 160-163.
Amat J.A. Soriguer R.C. 1981. Analyse comparative des regimes alimentaires de l'effraie Tyto alba et du moyen-duc Asio otus dans l'ouest de l'Espangne. Alauda 49: 112-120.
Begon M. Harper J.L. Townsend C.R. 1990. Ecology: Individuals Populations and Communities. Blackwell Scientific Publications Oxford.
Bertolino S. Ghiberti E. Perrone A. 2001. Feeding ecology of the long-eared owl (Asio otus) in northern Italy: is it a dietary specialist? Can. J. Zool. 79: 2192-2198.
Capizzi D. Luiselli L. 1996. Feeding relationships and competitive interactions between phylo-genetically unrelated predators (owls and snakes). Acta Oecol. 17: 265-284.
Capizzi D. Caroli L. Varuzza P. 1998. Feeding habits of sympatric long-eared owl Asio otus tawny owl Strix aluco and barn owl Tyto alba in a Mediterranean coastal woodland. Acta Ornithologica 33: 85-92.
Cramp S. Simmons K.E.L. 1985. Handbook of the birds of Europe the Middle East and North Africa—the birds of the Western Palearctic Vol. 4 Terns to Woodpeckers. Oxford University Press Oxford.
Dor M. 1947. The barn owl diet. Teva Va-Arez 7: 337-344; 414-419 (in Hebrew).
Garcia J.T. Arroyo B.E. 2005. Food-niche differentiation in sympatric hen Circus cyaneus and Montagu's harriers Circus pygargus. Ibis 147: 144-154.
Jaffe S. 1988. Climate of Israel. In: Yom-Tov Y. Tchernov E. eds. The Zoogeography of Israel. Dr W. Junk Dordrecht pp. 79-94.
Janes S.W. Barss J.M. 1985. Predation by three owl species on northern pocket gophers of different body mass. Oecologia 67: 76-81.
Leader Z. Yom-Tov Y. Motro U. 2008. Diet of the long-eared owl in the northern and central Negev desert Israel. The Wilson Journal of Ornithology 120: 641-645.
Marks J.S. Marti C.D. 1984. Feeding ecology of sympatric barn owls and long eared owls in Idaho. Ornis Scandinavica 15: 135-143.
Marti C.D. 1974. Feeding ecology of four sympatric owls. Condor 76: 45-61.
Paz U. 1986. The birds of Israel. C. Helm London.
Pokines J.T. Kerbis Peterhans J.C. 1998. Barn owl (Tyto alba) taphonomy in the Negev desert Israel. Isr. J. Zool. 44: 19-27.
Raczynski J. Ruprecht A.L. 1974. The effect of digestion on the osteological composition of owl pellets. Acta Ornithologica 14: 25-37.
Shirihai H. 1996. The birds of Israel. Academic Press London.
Tores M. Yom-Tov Y. 2003. The diet of the barn owl Tyto alba in the Negev desert. Isr. J. Zool. 49: 233-236.
Tores M. Motro Y. Motro U. Yom-Tov Y. 2005. The barn owl—a selective opportunist predator. Isr. J. Zool. 51: 349-360.
Veiga J.P. 1981. Variacion anual de regimen alimenticio y densidad de poblacion de dos estrigiformes: sus causas. Do�ana Acta Vertebrata 8: 159-175.
Yalden D.W. 1985. Dietary separation of owls in the Peak District. Bird Study 32: 122-131.
Yom-Tov Y. Wool D. 1997. Do the contents of barn owl pellets accurately represent the proportion of prey species in the field? Condor 99: 972-976.