What type of species is a Boreo-arctic Montane species found in the most northerly of the abstract five major circles of latitude as shown on maps of the Earth?
Arctic Circle The Arctic Circle is the most northerly of the abstract five major circles of latitude as shown on maps of the Earth. It marks the northernmost point at which the noon sun is just visible on the northern winter solstice and the southernmost point at which the midnight sun is just visible on the northern summer solstice. The region north of this circle is known as the Arctic, and the zone just to the south is called the Northern Temperate Zone. North of the Arctic Circle, the sun is above the horizon for twenty-four continuous hours at least once per year (and therefore visible at midnight) and below the horizon for twenty-four continuous hours at least once per year (and therefore not visible at noon); this is also true within the equivalent polar circle in the Southern Hemisphere, the Antarctic Circle.
Snow pigeon The snow pigeon ("Columba leuconota") is a species of bird in the Columba genus in the family Columbidae from hilly regions of central Asia. They are grey, black, pale brown and white birds, and two races are recognised; "C. l. leuconota" occurs in Afghanistan and the western Himalayas; "C. l. gradaria" occurs in the mountains of East Tibet and from East Nan Shan (Qinghai) to Yunnan. The birds forage in open country in pairs or small groups, feeding on grain, buds, shoots, berries and seeds. They roost at night on cliffs, breeding in crevices where they build untidy stick nests and lay a clutch of usually two white eggs. The International Union for Conservation of Nature has rated the bird's conservation status as being of "least concern".