During the dry season, over half a million tern crowd onto an atoll in the Indian Ocean.
As chicks grow into fledglings, they learn to fly using the shallow lagoon as a training ground. It’s tricky for some of less-advanced fledglings to stay in the sky for long.
Giant trevallies, usually solitary hunters, descend on the area, attracted by the abundance of prey.
Fledglings try to drink on the wing to avoid danger, but the ingenious fish have learned to hunt even in mid-air, turning the lagoon into a deadly arena.
Watch giant trevally hunt tern
This incredible footage was originally filmed for the BBC’s Blue Planet II.
Main image credit: Getty Images
