This environmental impact assessment for Kriegers flak ... - Vattenfall

88 PRESENTATION OF THE AREA
to acquire knowledge of the nocturnal migration and
height distribution during day as well as night.
Since radar lack coverage in the lowest interval,
visual studies were needed to register the migrations
below 10 m height. Visual and radar studies were
therefore carried out in parallel in order to detect at
which height each individual species is migrating at.
During the two test years, a total of 139 species of
birds have been observed migrating through the area,
see tables below. A complete list of the species is found
in Appendix 8.2.
There are very few studies of birds carried out at
sea. Earlier studies have been conducted from the coast
to a distance of about 5 km. The study carried by the
company could therefore be regarded as pioneer work.
Those documented studies of migrating birds across
the southern Baltic and its vicinity, have on behalf of
the company been collated by IfAÖ in a literary study
(see below).
It is difÞ cult to summarise all the results from the
above mentioned surveys. Only matters relevant for the
planned project are dealt with here.
Year 1
April 2002–March 2003
Days of observation 65 58
Number of species 117 110
Number of individuals, total 19.002 43.618
Individuals of defi nite species 17.090 42.084
Number of water fowl 14.966 40.005
Number of land birds 2.124 2.079
Individuals with no defi nite species 1.912 1.534
Most frequent species Eider (6.501)
Barnacle goose (4.675)
Wigeon (1.329)
Brent goose (868)
Common scooter (796)
Crane (474)
Siskin (270)
Chaffi nch (249)
Meadow pipit (239)
Skylark (145)
Species with highest continuity Cormorant (35)
Common scooter (31)
Eider (25)
Pied wagtail (23)
Barn swallow (22)
Black-throated diver (20)
Skylark (20)
Chaffi nch (20)
Meadow pipit (19)
Wigeon/Dwarf gul (17)
Summary survey of migrating birds 2002 – 2004
Year 2
April 2003–March 2004
Eider (30.662)
Barnacle goose (4.773)
Brent goose (1.418)
Common scooter (1.371)
Crane (905)
Wigeon (350)
Greylag goose (221)
Cormorant (210)
Meadow pipit (185)
Barn swallow (133)
Eider (41)
Common scooter (33)
Cormorant (31)
Barn swallow (26)
Graylag goose (22)
Common swift (21)
Lesser black-backed gull (17)
Meadow pipit (17)
Pied wagtail /Skylark/Black-headed
gull / Dwarf gull (16)