Short abstract from the book: The tree sparrow is a common breeding bird all over Denmark,
from the countryside to parks and gardens in towns. The first
tree sparrow was ringed in Denmark in 1920, but until 1960
only relatively few were ringed annually. Most birds were ringed in the first half of the 1970s. The recovered tree sparrows
were ringed in most parts of the country, and throughout the
year, most in November–January. Five birds ringed abroad
have been recovered in Denmark.
The recoveries show that Danish tree sparrows are very
sedentary. No birds have been recovered from abroad. Eighty-four per cent of the recoveries were within 1 km of the ringing
site and 98 % within 10 km. The mean distance between
ringing and recovery site was 1 km (0–35 km). Two Swedish,
one Norwegian, one German and one Belgian bird were recovered in Denmark.
The main cause of death is collisions with vehicles. Before
1970 8 % had been reported killed in traffic and after 1970
the proportion increased to 23 %. Before 1970 17 % had been
shot and 2 % killed by cats, after 1970 these proportions were
3 % and 13 % respectively.
Read more about the species in the chapter from The Danish Bird Migration Atlashere
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