On 15 June we had a mist-netting session at the Sand Martin colony. There were fairly low expectations as most of the first broods had fledged. Jenny was on hand again to take blood samples, so the totally unexpected catch of 48 birds was most welcome, and included 32 unringed birds (4 adult males, 14 adult females and 12 juveniles). All the juveniles were birds that were born elsewhere and were undergoing post-juvenile dispersal. Of the 16 already ringed birds, 7 were males, 5 were females and 4 were recently fledged juveniles. Of note, 1 of the males was ringed as a nestling in 2021. Another male was ringed as a nestling in 2023. Considering the activity levels around the colony at the time, the 30 adults were probably about 50% of the adult population at the colony.
Kev
No comments:
Post a Comment