If you're a Fisherman, you probably won't like this video. Either way, I think this behaviour is quite incredible... I mean we see this sort of activity in many intelligent species like Dolphin and Whales but Cormorants? Really? This is team work, using each other as a wall to herd small fry into the shallows. I had to video this for you to see for yourself because there must have been over 80-100 birds doing this at the same time in different channels on Llandegfedd. Gulls were lapping up the opportunity and so were the Little Egrets while trying to stay at the front of the cue.
I've seen this sort of behaviour before, but never as large as this. In this film there were at-least 50 birds in this channel and another 50 in the next. Both herding the fish into the shallows while working together in a line in order to do so.