. Il libro degli uccelli britannici dello sportivo . -i gufi diventano più bianchi, ma le femmine, che sono piuttosto largerthan i maschi, sembrano sempre più pesilyspotted e sbarrate grazie a quest'ultimo, e negli uccelli giovani le marcature scure sono certamente ancora moreabundant. In netto contrasto con quello dell'aquila-gufo, il nestling è stato vestito in sooty-bruno giù. Si può aggiungere che le galline innevate possiedono ciuffi di orecchie distinti, anche se poco visibili. Il piumaggio del gufo innevato è una speciale coesistenza di adattamento nelle regioni artiche, che formano il principale habitat delle thespecies, è evidente. Da allora, tuttavia

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. The sportsman's British bird book . -owls become whiter withage, but the females, which are rather largerthan the males, appear tobe always more heavilyspotted and barred thanthe latter, and in young birds the dark markings are certainly still moreabundant. In marked contrast to that of the eagle-owl, the nestling isclothed in sooty-brown down. It may be added that snowy owlspossess distinct, although inconspicuous, ear-tufts. That the plumage of the snowy owl is a special adaptation toexistence in the Arctic regions, which form the main habitat of thespecies, is self-apparent. Since, however, both the snowy owl and theeagle-owl breed in Lapland, it may be legitimately asked, wh-, if awhite plumage is essential in the one ca.sc, it is not equally so in theother? To this it may be replied that in reality both birds have a. MOUNTED IN THE flOWL«N0 SNOVVV OUT, (FKMAI-K). SNOWY OWL. 415 protective type of coloration, the eagle-owl haunting the woods, whereas the snowy owl frequents the open country, and in Siberia isfound on the open tundra beyond the forest-zone, where the dark-coloured species is unknown. The distribution of the snowy owl is circumpolar, and in Grinnell-land, where it arrives in the latter part of March and remains till theend of August, the species has been found nesting so far north aslatitude 82 32. In Lapland it breeds commonly, as it does inNovaia Zemlia, but to Iceland, the Farces, and Spitzbergen it isonly a straggler, as it is to the British Islands and a large partof northern and central continental Europe. There are, indeed, reports as to the former nesting of the snowy owl in Orkney, Shetland, and the Hebrides, but these do not appear to be definitelyestablished. To the Outer Hebrides, as well as the more northerhBritish Islands, the species is a b}- no means uncommon visitor, ge

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