Short abstract from the book: The house martin is a common breeder in most parts of the
country. In Denmark the first house martin was ringed in
1921, and many birds have been ringed since the late 1920s.
The majority of the recovered birds belonged to the Danish
population, being either ringed as chicks or as fully grown in
the breeding season. Most were ringed in eastern Denmark.
Few have been recovered and the recoveries give only limited
information about the migration of Danish house martins.
It appears that migration is more or less due south through
central Europe: one bird was recovered in Austria on 24
September, one in Germany on 10 November and one in
France on 1 October. No Danish house martins have been
recovered further south. No birds have been recovered in
spring. Of 24 birds ringed as adults in the breeding season
and recovered in a subsequent breeding season all were recovered at the ringing site. Of 62 house martins ringed as chicks
and recovered in a subsequent breeding season, 46 were recovered at the ringing site (27 as one-year-olds).
Only three foreign birds have been recovered in Denmark,
one ringed in Germany and two in Sweden.
Read more about the species in the chapter from The Danish Bird Migration Atlashere