Kattinge Lake lies beside the innermost inlet in Kattinge Vig, called Slinken.
In the 1300’s the Hvide family separated the lake from the fjord by building
a dam and the Neppe fortress. The Kornerup River runs through the lake. This
river drains an area of about 125 square kilometres and delivers about 50 million
cubic metres of water to the fjord every year. The lake is very shallow and
the water quality is poor, with visibility of less than half a metre. The lake’s
outlet to the fjord is beside Kattinge Værk
In the summer the Great Crested Grebe is the most commonly seen bird here. From
the birdwatching tower you can see how the parent birds swim with the striped
young on their backs, and how the young are able to hold on when the parents
In the autumn large flocks of Starlings overnight in the reeds, and an Osprey
will often roost here, on its way from its Swedish breeding grounds to its winter
quarters in North Africa. You might be lucky enough to see how it dives for
fish in the same way as a tern. In the cold half of the year Kattinge Lake is
one of northern Europe’s largest roosting sites for Tufted Duck. Up to
30,000 might gather here – about 3% of the Tufted Duck on the northern
European migration routes.
During the day they sit quietly on the most sheltered part of the lake, but
about an hour after sunset the whole flock takes to the air, usually simultaneously,
and goes out into the fjord, where they spend the night diving for Common Mussels
and other bottom-feeders.