A few of the Common Terns showed up at the Sequoyah National Wildlife Refuge in Oklahoma this spring. I tried to photograph them diving and catching fish out of the river but I never saw one that was successful.
The Common Tern is an agile flyer, capable of rapid turns and swoops, hovering, and vertical take-off. When commuting with fish, it flies close to the surface in a strong head wind, but 10–30 m (30–90 ft) above the water in a following wind. Unless migrating, normally it stays below 100 m (300 ft), and averages 30 km/h (18.6 mph) in the absence of a tail wind. Its average flight speed during the nocturnal migration flight is 43–54 km/h (27–33 mph) at a height of 1,000–3,000 m (3,200–9,700 ft). (Wikipedia)