Rook

Corvus frugilegus

Råge

Råge

Short abstract from the book:
The rook is a common breeding bird in most of Denmark, though is most abundant in eastern parts of the country. In October–November and March–April passage migrants are observed in Denmark. The first rook was ringed in 1921, with the majority ringed in the early 1980s. Seventy per cent of the recovered birds were ringed on Zealand, 16 % on Lolland-Falster, 5 % on Funen and 9 % in Jutland. At least 70 % of the recovered birds were from the Danish population, either ringed as chicks or as adults in the breeding season. Most of the Danish rooks are residents. Only nine were recovered more than 100 km from the ringing site, of these three outside Denmark. The mean distance between ringing and recovery site of the remainder was only 11 km, and 72 % were recovered within 10 km of the ringing site. Some young birds have been found already in late May up to 30 km from the ringing site, but the mean distance is only 2 km in June, 5 km in July, 10 km in August and 18 km in September–October. Some of the rooks ringed as chicks were recovered in the breeding colony both as a one-year-old and older. The mean distance between ringing and recovery site for rooks ringed as chicks and recovered in the breeding season as adults was 11 km. Rooks ringed or recovered in Denmark outside the breeding season come from Norway, Sweden, Finland, the Baltic countries, Poland, Belarus and Russia. The majority of the migrants probably remain in Denmark throughout the winter, since only a few of the ringed birds have been recovered further south. Thirteen rooks ringed in October–April in Germany and one in Belgium have, however, been recovered in Denmark.

Read more about the species in the chapter from The Danish Bird Migration Atlas here

Ringing data for Rook

 
Datavisning: genmeldinger    genmeldinger/mærkninger    mærkninger
Sæson: alle    vinter    forår    sommer    efterår
Periode: alle    før 2003    2003 og frem    seneste 365 dage


Data

Birds ringed
Birds ringed 1.577
Ringed as chicks 0 (0,0%)
Recoveries
No. of recoveries 391
No. of individuals 0
Proportion recovered 0,0%