Just after finishing my BBS on ST1576, a group of birds flew low and fast over me (next to Ysgol Treganna). To my surprise, they were 20 or more swallows – heading SE. Then a pair of swans flew over, which would have been a first for the BBS. The last bird of the survey was a first – a drumming GSW on the far side of the R Ely (near Trelai Park & allotments).