Purps occasionally hang on into early May.
A flock of 13 Little Gull flew down the river & straight out with another goodly gang of 30 over the Fort then straight out to sea over an hour later. These are presumably birds migrating overland from the Atlantic Ocean to the North Sea that descend to sea level when confronted by a strong onshore wind. As next to no time put into sea watching this morning no doubt other flocks were missed.
Migrants on site hard to come by but included 2 Chaffinch, 2 Redwing, Black Redstart, Chiffchaff, Fieldfare plus southbound 3 Goldfinch, 2 Jackdaw, 2 Siskin & Mipit.
Peacock butterflies have no problem getting into the buildings to hibernate in the autumn but when it comes to finding their way out in the spring it is a completely different story. When rescued from the inside of dirty cobweb covered windows they don't take long to warm up in order to get on with their lives.
Ringing: 1 Chiffchaff, 1 Wren