So far in total we have ringed or retrapped 369 birds made up of 33 males, 60 females and 286 nestlings. The later have survived well in the excellent June weather, the number of caterpillars on the Oak especially appears to be high, and the numbers of insects especially midges is amazing!
A quick analysis of the retrap data shows that although 13 of the birds ringed as nestlings in previous years and retrapped breeding this year returned to their native wood, but 27 moved to other woods within the Lune valley. But of adult birds 13 returned to the wood they breed in last year and only two changed woods. There were several examples of birds returning to the same box to breed.
Our oldest bird is in its seventh year and was originally ringed as an adult. This female bred in the same wood for three years,was missed the next year, then moved 4 km to another wood and this year moved 3km. We have two others in their fifth year.
John
No comments:
Post a Comment