What do you mean, a drip?

Thaw has set in and ice only remains round the boats and in the basins but it is still strong enough to support a flock of swans. This mute swan had just seen off a rival, quite aggressively and only resumed this pose after dabbling and flicking the water up in front.

P.S.
I have been told they are a 'herd' or a 'whiteness' of swans - and when flying they are called a 'wedge'.