Western Cleddau

Another (sewin-less!) visit last night to the stretch of the river opposite Crow Hill. Good numbers of Swifts (20+), which outnumbered all the hirundines. A few weeks go there had been good numbers of House and Sand Martins but none were evident yesterday. Slightly worryingly, the Sand Martin colony in one of the bends of the river appears totally unoccupied: 2 years ago this had 30+ holes. No signs of Kingfishers, either, but a nice Otter, and 10-15 pretty large bats that came out just after 2100 and flew around high and in a very agile fashion, often mixing with the Swifts. I could even hear their calls occasionally, so perhaps Noctules?