forest, steppe & tundra studies in animal evironment

abundant adapted America animals ants appear arctic association bees bionomical birds body breeding bugs butterflies called certain clearings climate colour common comparatively distribution eggs enemies environment existence fact factor fauna feed feet flowers foliage forest formation forms frequently grass green ground grow growth Guiana habits includes increase insects instance interesting islands jungle kind known land larvæ later leaves lemming less light live London mammals mean migration mimicry mountain natural nest observations pass perhaps plants possess possible present probably protection queen range region remarkable resemblance rest river roots scarcely season seems seen snow soil sometimes species spring steppe structure suggested summer surroundings swamp temperature tion traveller trees tropical tundra usually vegetation whole wind wings winter young zone