. Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage . Vanessa urticae '2 Deciduous Forest Coniferous Forest Elfin Wood Snow Zone i Cultivated Land Fig. 130.—Distribution of a snow butterfly, Maniola glacialis; an alpine form, Pieris callidice; and a lowland form accidental!}' reaching the snow zone, Vanessa urticae. After Handschin. adaptations. Chamois, ibex, yak, and mountain sheep have strong spreading hoofs. The American and Asiatic pikas and the chinchillas of the Andes are abundant among rocks. The pikas depend greatly on th
. Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage . Vanessa urticae '2 Deciduous Forest Coniferous Forest Elfin Wood Snow Zone i Cultivated Land Fig. 130.—Distribution of a snow butterfly, Maniola glacialis; an alpine form, Pieris callidice; and a lowland form accidental!}' reaching the snow zone, Vanessa urticae. After Handschin. adaptations. Chamois, ibex, yak, and mountain sheep have strong spreading hoofs. The American and Asiatic pikas and the chinchillas of the Andes are abundant among rocks. The pikas depend greatly on the rock slides for concealment and for situations in which they store food. It must, of course, be remembered that rock-inhabiting animals of many groups may be equally represented in the lowlands or may not range at all into the mountain habitat. Zonal endemism.—The high mountain fauna may be classified according to its vertical distribution into true alpine, tolerant alpine, and accidental alpine forms. The true alpine faunal element consists of the minority of animals which are confined to the alpine zone, such as the snow finch (Montifringilla), the wall creeper (Tichodroma), the marmot (Marmota), and the chamois, in the Alps. Alpine-tolerant animals are those which can live and develop in the alpine zone, but range into it from lower levels. The Apollo butterfly, the viviparous
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectanimalecology
