Phone call from MB mid afternoon that a Ferruginous Duck had been reported on birdguides at 1.00pm. Went with tall Andy and got there at 3.15pm to be greeted by nothing. After walking around the reservoir we finally found a few Tufties 1 cormorant and a couple of Mallard. Two years ago a Common Nighthawk actually came on peoples pages and idiot me actually went looking for it. Dont think Ive ever seen a decent bird here yet ! Anyway on leaving discovered a corvid roost of around 6 or 700 birds mainly Jackdaws.