When the drizzle came earlier I was expecting Swifts and hirundines galore. Well, there were lots of hirundines but none coming low enough to catch and as for Swifts were concerned ... none, which was a surprise this far in to May.
I did however catch a Pied Wagtail and two Yellow Wagtails (male and female). The female was just beginning to develop a brood patch, so I expect she will be breeding in the crop fields to the east where several pairs nest each year, supported by the relatively abundant insect life found around the filter beds. Nine Yellow Wags were on ste this evening.