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Smallest insect filmed in flight

Date:
May 25, 2011
Source:
Wageningen University and Research Centre
Summary:
Scientists have taken high-speed camera footage of parasitic wasps with about a one mm wingspan. The team made films of the tiny flying insects at 22,000 frames per second. That is almost 900 times faster than a TV-screen can show. In the time between two TV images, the wasp has beaten its wings 14 times.
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Parasitic wasp landed on a cabbage white butterfly.
Credit: Nina Fatouros

The Flight Artists team from Wageningen University, the Netherlands, has been the first to make high-speed camera footage of parasitic wasps of about 1 mm wingspan. The team made films of the tiny flying insects at 22,000 frames per second. That is almost 900 times faster than a TV-screen can show. In the time between two TV images, the wasp has beaten its wings 14 times. 

This is the first time the flight behaviour of the parasitic wasp is observed, which is used as biological crop protector that kills the eggs from which harmful caterpillars grow. It was known that parasitic wasps hitchhike on top of larger insects, such as butterflies, but until now nobody had seen how the wasps were able to fly to the butterflies and their eggs.

The high speed movies show how the parasitic wasp jumps up into the air, elegantly flaps around, and then somehow lands -- the insect sometimes boldly lands face-first. Nevertheless the wasps are able to fly over some distance with their wings beating -- as the new images reveal -- at 350 strokes per second. The insect are estimated to weigh only about 1/40,000th of a gram, but it is not the smallest known insect; the Tanzanian parasitic wasp spans less than 0.3 mm, which is about 3 times smaller. This extremely small insect cannot be bred so far, therefore it can only be found and filmed in the wild.

The movies are made by researchers at Wageningen University, part of Wageningen UR, using a Phantom high-speed camera. This same camera will be made available to the nature amateurs, artists, and hobby photographers that applied to participate in the Flight Artists project. The project aims at involving the general public in scientific research into the way in which birds, bats, insects, and even seeds fly. They will use the newest high-speed video techniques to shoot images of fliers in Nature that fascinate them. A range of special lenses, lamps and field facilities is available to record details that are invisible to the naked eye; invisible, either because they are too small or, more likely, because they are too rapid for the observer. So far, 54 participants have been trained to take this extraordinary camera into the field.

See movie on http://www.youtube.com/watch?v=kZyIN23Cy4Y


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The above post is reprinted from materials provided by Wageningen University and Research Centre. Note: Materials may be edited for content and length.


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Wageningen University and Research Centre. "Smallest insect filmed in flight." ScienceDaily. ScienceDaily, 25 May 2011. <www.sciencedaily.com/releases/2011/05/110525105832.htm>.
Wageningen University and Research Centre. (2011, May 25). Smallest insect filmed in flight. ScienceDaily. Retrieved August 30, 2015 from www.sciencedaily.com/releases/2011/05/110525105832.htm
Wageningen University and Research Centre. "Smallest insect filmed in flight." ScienceDaily. www.sciencedaily.com/releases/2011/05/110525105832.htm (accessed August 30, 2015).

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