Air Greenland year. However, this service ceased in 2015. In July 2015, Air Greenland became a member of the European Regions Airline Association. Air Greenland's domestic airport network includes all 13 civilian airports within Greenland. Outside Greenland, the airline currently operates transatlantic flights to Keflavík International Airport in Iceland and Copenhagen Airport in Denmark. Two international airports capable of serving large airliners – Kangerlussuaq Airport and Narsarsuaq Airport – were constructed as U.S. Air Force military bases during the Second World War and continue to be used for transatlantic flights. All other regional airports are STOL-capable and are served with Dash 7
Greenland from Europe. There are no native or free-living reptiles or amphibians on the island. Phytogeographically, Greenland belongs to the Arctic province of the Circumboreal Region within the Boreal Kingdom. The island is sparsely populated in vegetation; plant life consists mainly of grassland and small bushes, which is regularly grazed by livestock. The most common tree native to Greenland is the European white birch ("Betula pubescens") along with gray-leaf willow ("Salix glauca"), rowans ("Sorbus aucuparia"), common junipers ("Juniperus communis") and other smaller trees, mainly willows. Greenland's flora comprises about 500 species of higher plants, i.e. flowering plants, ferns, horsetails and lycopodiophyta.