10th May - cloudy, mod-freah NE, light showers early, 10C

A significant weather change as a cold front moved south over night bringing  cool and windy (up to 20mph) weather.

Stanford reservoir; Over the water a lot of hirundines feeding on the insects being blown by the wind, difficult to count, 300+House Martins, c30 Sand Martins, c30 Swallows and c30 Swifts.  A Hobby also catching insects.
A Yellow Wagtail sheltered in the spillway, where  Grey Wagtail (male) was agitated.