Swallows

Bottisham Pumping Station has Swallows breeding and roosting in it and around it.   These young ones were enjoying the warmth of the morning sunlight and getting some preening done.   On this and a previous occasion there must have been about 50 Swallows perching and flying around.   About an hour later they had left the site - I think to spend the day on the wing, feeding.   With these weather conditions they may not hang about in the UK for much longer.

 I believe the butterfly is a Green-veined White.