spills onto the lowland areas, which occurs most frequently in the winter. Because the season's lower temperatures damage olive trees and citrus fruits, groves and orchards are restricted to sheltered places with southern and western exposures, even in areas with high average winter temperatures.
Lowland rainfall averages from 1,000 millimeters (39.4 in) to more than 1,500 millimeters (59.1 in) annually, with the higher levels in the north. Nearly 95% of the rain falls in the winter.
Rainfall in the upland mountain ranges is heavier. Adequate records are not available, and estimates vary widely, but annual averages are probably about 1,800 millimeters (70.9 in) and are as high as 2,550 millimeters (100.4 in) in some northern areas. The western Albanian Alps (valley of Boga) are among the wettest areas in Europe, receiving some 3,100 mm (122.0 in) of rain annually. The seasonal variation is not quite as great in the coastal area.
The higher inland mountains receive less precipitation than the intermediate uplands. Terrain differences cause wide local variations, but the seasonal distribution is the most consistent of any area.
In 2009 an expedition from University of Colorado discovered four small glaciers in the 'Cursed' mountains in North Albania. The glaciers are at the relatively low level of 2,000 meters – almost unique for such a southerly latitude.
Flora and fauna
Although a small country, Albania is distinguished for its rich biological diversity. The variation of geomorphology, climate and terrain create favorable conditions for a number of endemic and sub-endemic species with 27 endemic and 160 subendemic vascular plants present in the country. The total number of plants is over 3250 species, approximately 30% of the entire flora species found in Europe.
Over a third of the territory of Albania – about 10,000 square kilometers (2.5 million acres) – is forested and the country is very rich
