Short abstract from the book: The blackbird is one of the most common breeding birds
in Denmark, breeding in woodland, farmland, parks and
gardens. It is furthermore a common passage migrant in
September–November and March–May. The first blackbird
was ringed in Denmark in 1918, with the majority ringed
from the 1960s to today. The recovered birds were ringed over
much of the country, in highest numbers close to cities and at
migration hotspots. Birds have been ringed throughout the
year, most in May–June and October. The recoveries show that
most of the Danish blackbirds are residents. During winter
58 % have been recovered (as dead) at the ringing sites, with
only 16 % moving more than 20 km. The mean position of
females is further south than that of males. The migrants leave
Denmark in October. Some birds migrate W to the British
Isles and others SW to France, the Netherlands and Belgium.
The blackbirds start the return migration in February and
in April the mean position is in Denmark. Migrants from
Norway, Sweden, Finland and the Baltic Countries pass
Denmark on their migration. Most of these birds arrive in
October and many continue SW. The passage migrants winter
in the British Isles, France, the Netherlands and Belgium. On
their return migration, most passage migrants pass Denmark
in April.
Read more about the species in the chapter from The Danish Bird Migration Atlashere
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