By Agence France-Presse

PARIS — A Japanese researcher has put paleo-biologists in a flap by suggesting pterosaurs — the winged lizards beloved of toymakers and dino movies — were unable to fly, New Scientist says.

Katsufumi Sato of the University of Tokyo carried out an unusual study on the Crozet Islands, in the southern Indian Ocean, to test flying ability among large sea birds.

He attached accelerometers the size of AA batteries to the wings of 28 birds from five large species, including the wandering albatross, the world’s biggest flying bird.

Albatrosses fly by riding shifting winds, thanks to wings spanning 3.5 metres (11.4 feet) whose shape can be varied to exploit each draft.

When there is no wind, or if the wind blows at a constant speed, the bird can only stay aloft by flapping its wings, otherwise it is forced down by gravity and air resistance.

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