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All birds were counted along six permanent routes (total length 90 km) located in the low alpine zone (800–1,000 m.a.s.l.) at Ammarnäs, southern Lapland, during forty years, 1972–2011. Eighty-three species were recorded; average 41 species and 1,677 birds per year. Number of species as well as population size increased for waterfowl, waders and other non-passerines but not for passerines. Thirteen of the thirty-eight most regular species had significant population trends, twelve of themdoi:10.34080/os.v23.22578 fatcat:vkraoemsyncrhcj23k2vf7zceq