A few months back I posted images of terns mating. I am not sure where the nesting took place, but recently noticed terns carrying fish back to a shallow, seaside lake where they were settled in large flocks. I was also alerted by raucous cacophony of wild sound coming from them. Yesterday I decided to slowly walk into the area. Some of the flocks took off and I thought they were headed elsewhere, but found that in fact they were just circling me, probably saying "scram." What surprised me was that many of them were still carrying the fish. I spent an interesting half hour trying to capture them in flight.
This image clearly shows the relative massive, streamlined wingspan that makes them such superior aviators.