Returned to my Bat survey square twice to try and locate the Natterer's Roost, but no success. Must be very close to the roost, but am finding them emerge further and further along the towpath.. next trip I will concentrate in a small wooded area where they seemed to be congregating well before their usual emergence time. Failing that, I will have to return before dawn and follow them!
A hobby is a regular visitor to the towpath, and I see him hunting well after sunset.
Also, rather surprisingly was a Mandarin with 6 chicks on the canal.
Took three fairly lengthy visits to local woods before finally catching up with the Wood White Butterfly. Well worth it though, as I got good views of a male. Such a tiny, delicate looking butterfly, they are quite distinctive even on the wing 100yards away. Took a good 20 minutes of following one before I saw it land! | 
