Natural Science

dragonfly-on- - dragonflies, damselfly, Odona...

next>

Download small medium full
(Natural Science): dragonfly on green leaves OGS.jpg
D=1999/04/05 [Apr 5, 1999]; S=188kB, 661x447; T=JPEG image [MIME:image/jpeg].
FREE to download and use! (c) Oswald Skene

Rating: 60/100.

Key: D= file date of exhibit; S= size in bytes, XxY pixels, etc; T= type of exhibit; L= location/time or viewpoint of exhibit (if known).

dragonfly = dragonflies, damselfly, Odonata, Anisoptera = See the British Dragonfly Society (BDS). According to the Metro (London 20050503): ``Dragonflies are amongst the fastest insects in the world, flying at speeds of up to 96kph (60mph). They have two pairs of almost equal-sized glassy wings [Anisoptera means "unequal wings"] and their compound eyes have up to 30,000 facets. The largest dragonflies have a wingspan of some 18cm, but fossils have been found with wings up to 70cm across.'' On the speed issue, the BDS says: ``The maximum speed of large species like the hawkers is around 10-15 metres/sec, or roughly 25-30mph. Average cruising speed is probably about 10mph. Small species, and especially damselflies, are generally slower, although many medium-sized species can probably keep up with the largest ones.'' As to size, the BDS says: ``The biggest wingspan of a living dragonfly is the Central American Megaloprepus coerulatus with a wingspan about 19cm. This is a thin, long-abdomened damselfly.'' (``Dragonflies and damselflies belong to the insect order known as Odonata, meaning "toothed jaw": their mouthparts are serrated. They are often referred to collectively as "dragonflies", however there are two different sub-orders.'')

StumbleUpon - Digg this

About This Category

This collection is of free images/photos/pictures, sounds, videos, etc from science, technology and nature, including birds, animals and plants, ans some from the fields of chemistry, physics and biology. Some exhibits that could be in here may be found in collections with a more specific remit, such as "Flowers" and "Leaves and Greenery".

This is intended to serve, in part, as a teachers' and students' resource.

See also New Scientist for the latest news, The Register's science and tech stories, the EurekAlert!/AAAS Multimedia Gallery, the Nature Photo Index for lovely images, BioImages - Virtual Field-Guide (UK) for scholarly info, and Adam Hart-Davis's ever-popular stories of Science and Technology Heros.

Also, for attempts to catalogue all known species, see: the Encyclopedia of Life, and Barcode of Life.

If you're a journo or other non-scientist and need help with a science fact or story, please consider talking to Sense About Science to help you.

Some Similar Exhibits

Thumbnail

Exhibit Name

New Zealand South Island west coast Pancake Rocks aka Punakaike inland trek 07 giant dragonfly MB.jpg (Earth Views)

new zealand = .nz, NZ, Aotearoa, "The land of the long white cloud", Neuseeland, Nouvelle-Zélande, Nueva Zelanda, Nueva Zelandia, Nova Zelândia, Nuova Zelanda
new zealand south island = Te Waka o Aoraki, "The Canoe of Aoraki"

dragonfly green large on pink clothes on washing line in June sunshine in north London England 1 DHD.jpg (Natural Science)

dragonfly = dragonflies, damselfly, Odonata, Anisoptera

Metadata XML.

XHTML (mobile) --- Catalog Page

Nov 22, 2008 You may want to hit the Reload/Refresh button on your browser to ensure that this page is up-to-date.

Site copyright (c) Damon Hart-Davis 1996-2008; exhibit content copyright of specified creator; see terms and conditions for use. Site sponsored by ExNet. Powered by Java^tm.

14u 34ms