s and
cormorants near shore in the
Baltic Sea near Alby. '' (dropwort) plant found on this part of the Stora Alvaret at Alby. The western fringe of Alby includes some
grazing land and borders on the
Stora Alvaret, the greatest expanse of
alvar habitat in
Europe. This unique geological formation is an almost level
plateau. The Stora Alvaret has an extremely thin soil mantle, that creates conditions of unusual adaptation and hence leads to a host of
rare plant species. The first documented scientific study of the
biota of the eastern part of the Stora Alvaret occurred in the year 1741 with the visit of
Linnaeus. He wrote of this unusual ecosystem: "It is noteworthy how some plants are able to thrive on the driest and most barren places of the alvar". The alvar here also supports
rare species of
butterflies,
moths and other
insects. Some
relict species from the glacial age are among the
flora palette of the Stora Alvaret. A wide variety of
wildflowers and other plants are found on the limestone pavement ecosystem. Some of the species found include
stonecrop,
dropwort,
Artemisia Öelandica (
endemic to Öland), and kidney
vetch. At the northwest of Alby is a seasonal wetland having
vernal pools and corresponding diversity of wetland plants. The eastern part of Alby is a coastal plain leading to sand and
shingle beaches. This sandy coastal plain supports a variety of native grasses and beach wildflowers different from the alvar species on Alby's west side. Avifauna on the beach side include the
black tern and
Eurasian curlew, both of which also frequent the vernal ponds to the north. Marine birds found here include
great cormorants and
mute swans; marine mammals such as
harbour seal and
harbour porpoise are also seen. ==See also==