of its size, northerly position and pristine habitats, Alaska provides breeding
habitat for more shorebirds than any other state in the U.S. Seventy-one
species of shorebirds (one-third of the world's species)
occur in Alaska; 37 of these regularly breed here while 9 others breed irregularly,
or annually but in small numbers. Alaska is unique in that it hosts most of the
world’s population of three shorebird species, entire population of five
subspecies and large portions of North American populations of six other species
or subspecies. In total, Alaska hosts between 7 and 12 million shorebirds, or
as much as 50% of all the shorebirds that occur in North America.
terms of essential habitat, Alaska has more than 50 shorebird migration staging
or stopover sites that qualify as Western Hemisphere or East Asian-Australasian
Shorebird Reserve Network sites. At 10 of these sites concentrations exceed 1
million birds, with sites like the Copper River Delta hosting between five and
eight million shorebirds each spring. The Yukon-Kuskokwim Delta likely supports
an equal number shorebirds but they occur mostly during summer and autumn. Indeed
the world’s largest aggregations of shorebirds are thought to occur on the
Copper River Delta.
This vast network of migration sites host the arrival and
exodus of shorebirds to and from Alaska during each spring and fall. Only 6 of
the 43 taxa that regularly occur in Alaska winter there. But of these 43 regularly
occurring taxa, some portion of the populations of 38 winter outside the U.S.
while entire populations of 18 others migrate to Central and South America or
East Asia-Australasia and South Pacific countries (Oceania). Alaska's shorebirds
are not only a national resource; but they also provide international links to
over 40 countries distributed on five continents.
Last Updated: September 18, 2008