. [Artikel über Vögel von National Geographic Magazin]. Vögel. Schattenhafte VÖGEL DER NACHT 219. Foto von Ben Osten die SCHLEIEREULE können ANERKANNT DURCH DIE HERZ-geformtes Gesicht Naturforscher haben schleiereulen unter einer Familie eingestuft, während alle anderen Eulen sind Mitglieder einer anderen. Dieser Brütete fast neunzig Tage über eine Kupplung von zehn Eier, die nicht auf eine Limousine. Dann, nachdem Sie sie aus dem Nest, legte es Anderen und warf eine Familie von vier. andere Tierkörper. Mäuse, Ratten und andere kleine Säugetiere sind regelmäßige Beute, wie Vögel verschiedener Arten. Die gesperrten Eule frisst viele Krebse und Fische, während c

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. [Articles about birds from National geographic magazine]. Birds. SHADOWY BIRDS OF THE NIGHT 219. Photograph by Ben East THE BARN OWL MAY BE RECOGNIZED BY ITS HEART-SHAPED FACE Naturalists have classed barn owls under one family, while all other owls are members of another. This one brooded nearly ninety days over a clutch of ten eggs that failed to hatch. Then, after pushing them from the nest, she laid others and raised a family of four. other carcasses. Mice, rats, and other small mammals are regular prey, as are birds of various species. The barred owl eats many crayfish and fish, while crabs and fish are staple foods of the fish owls of Africa and India, which have featherless legs and rough, horny-sur- faced toes to assist in capturing such slip- pery prey. I have known the great horned owl to capture goldfish in ornamental pools, but this is unusual. Owls, like hawks, tear their prey apart and swallow the pieces entire. During digestion the flesh is assimilated, while bones, fur, feathers, and other indigestible portions are formed into compact pellets, which are regurgitated to leave the stomach empty for another meal. Such pellets ac- cumulate about roosts and, through identi- fication of the bones contained, give a valuable index to the food of the bird concerned. The great horned owls and snowy owls are fiercely predatory, killing rabbits, squir- rels, and other creatures of good size. The former has been known to capture and eat small owls. In the Dominican Republic I once saw a burrowing owl tearing at the body of a young bird of its own kind which had been killed and thrown aside by some native. While the mind of a bird may be known only by inference, it was my impres- sion that the owl had been attracted by the sight of bloody flesh, and that the cannibal- ism was involuntary, the bird being without recognition that its prey was a creature of its own kind. Occasionally wild mice increase for vari- ous reasons until they form a veritable plague. Under

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