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

Direction of flights for land birds during individual months of the main flight
Flyttriktning för landfågel under enskilda månader av huvudsträcket
Direction and height distribution
During spring migration the preferred
ß ight direction was from north to east. The
direction of ß ights for land and water fowl
is presented in the tables below and on the
previous page.
During the visual observations nearly
half of the birds ß ew below 10 meters
height (Þ gure on the right).
Generally, water fowl were ß ying at
the lowest heights. Differences for both
season and species were noted (Þ gure on
the right).
Birds were ß ying at a higher levels
during spring than during autumn. Geese,
wigeons and cranes ß ew higher than 50
metres. Gulls, apart from little gulls,
ß ew at a level of 10-50 metres. Loons and
pochards, particularly eider ducks and
scoters ß ew below 10 metres.
The ß ight of cranes on 27 March 2004
took place at between 100 and 200 metres
height. This differs from the ß ight of
cranes between 12 and 13 September 2002,
where the average ß ight height, with the
aid of radar, was recorded to 242 metres.
PRESENTATION OF THE AREA 95
Month N NE E SE S SW W NW n
April 2002 51 6 19 10 3 0 8 4 455
March 2003 25 8 2 13 17 13 2 20 179
April 2003 36 52 4 4 0 0 0 4 143
May 2003 54 0 4 2 7 7 13 14 56
March 2004 46 50 1 1 0 0 0 2 924
August 2002 0 0 0 5 77 5 9 5 22
September 2002 35 0 3 0 25 5 33 1 610
October 2002 0 0 0 0 96 0 5 0 119
July 2003 1 1 3 20 15 37 17 6 231
August 2003 1 2 0 2 15 36 46 0 131
September 2003 0 1 6 4 70 12 6 0 159
October 2003 3 0 2 4 3 9 68 11 376
Species/Group of species < 10 m 10–50 m > 50 m n groups
Divers Gavia spec. 50/29 25/57 25/14 16/14
Cormorant Phalacrocorax
carbo 37/46 50/42 13/12 30/41
Barnacle goose Branta
leucopsis 75/35 8/8 17/57 12/40
Geese Anser spec., Branta spec. 13/51 27/26 60/23 15/74
Wigeon Anas penelope 35/47 21/47 45/6 29/19
Eider Somateria mollissima 64/53 25/45 12/2 52/617
Common scooter Melanitta
nigra 47/70 37/28 17/2 60/74
Long-tailed duck Clangula
hyemalis 93/100 8/0 0/0 14/12
Sparrow hawk Accipiter nisus 30/65 40/35 30/0 10/26
Crane Grus grus 5/0 11/8 84/92 19/12
Herring gull Larus argentatus 12/33 82/50 6/17 138/12
Lesser black-backed gull Larus
fuscus 21/41 79/59 0/0 19/22
Common gull Larus canus 30/22 70/78 0/0 10/18
Common gull Larus minutus 67/77 33/23 0/0 18/57
Barn swallow Hirundo rustica 65/60 29/38 6/2 17/52
Pied wagtail Motacilla alba 57/77 38/23 4/0 47/13
Meadow pipit Anthus pratensis 26/83 62/12 13/5 47/41
Chaffi nch Fringilla coelebs 31/60 54/40 15/0 13/10
Percentage distribution of flight heights for migrating birds at
Kriegers Flak according to visual observations during the first
and second year of survey (n = number of groups).