A drone captures a group of hungry humpback whales lunge feeding on huge shoals of herring. Shot in November by wildlife filmmaker Patrick Dykstra, 36, in Northern Norway, this incredibly rare footage shows the giant sea mammals hunting in unison. The US photographer saw around 100 humpbacks in the same area, each weighing around 30 tons. Lunge feeding involves whales swallowing massive amounts of fish and then pushing out the water with their tongues. Colorado born Patrick, who has swam with humpbacks on five different continents, revealed it is unusual to see this type of behaviour happening in groups.