Drone shows the secret life of rare whales

2016-06-10 10:15
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Wellington - New Zealand researchers have captured stunning drone footage of endangered whales feeding off the Auckland coast, giving an unprecedented insight into the majestic giants of the sea.

In a world-first use of drone technology, the researchers dispatched a customised "eye in the sky" so they could observe the rare Bryde's whales without disturbing them.

The resulting footage shows an adult and calf frolicking in the water and using a "lunge" feeding technique to feast on plankton and shoals of small fish.

The adult, a grey behemoth measuring 12 metres long, turns sideways and swims just under the surface, opening its huge mouth to funnel in food.

As it powers forward, the rush of oncoming water expands the underside of its mouth so it balloons out allowing it to fit in more food.

Hit by ships

"Never before have I seen anything like this," said Auckland University of Technology ecologist Barbara Bollard-Green.

"There's no way we would see so much detail from a boat-based survey."

Bryde's whales are listed as critically threatened in New Zealand, with less than 200 remaining in the South Pacific nation's waters and about 100 000 worldwide.

Their preference for feeding just below the surface makes them vulnerable to being hit by ships, particularly in the busy waters around Auckland.

The researchers say that using drones allows them to study marine mammals while keeping their distance.

The waterproof aircraft used to film the whales was 40m from them at all times, with the researchers' boat about 1.5km away.


Read more on:    new zealand  |  marine life

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