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Cranefly haltere

 
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Charles Krebs



Joined: 13 Jul 2004
Posts: 1200
Location: Issaquah, WA USA

PostPosted: Sat Apr 30, 2005 10:59 am    Post subject: Cranefly haltere Reply with quote

well... Wim asked, so here they are. Wink

The halteres of flies are the small club shaped structures that are located where you might find rear wings on some other insects. (Flies only have one set of wings for flight.) They are quite prominent on this large cranefly. They are usually refered to as the "vestigial" or "rudimentary" rear wings. They serve as "gyroscopes" or balancers during flight. Interestingly, research has shown that (at least on some flies studied) they also receive the flight directing stimuli from the insects vision rather than that stimuli going directly to flight muscles, as might be expected. If this is of any interest you should read this link:
http://www.berkeley.edu/news/media/releases/98legacy/04_09_98a.html





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piotr



Joined: 28 Apr 2004
Posts: 445
Location: San Diego

PostPosted: Sun May 01, 2005 4:38 pm    Post subject: Reply with quote

Thank you for this very interesting post. Beautiful pictures, as usual.
Are these 3D reconstructions, too?
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Ken Ramos
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Joined: 04 May 2004
Posts: 4809
Location: Western North Carolina

PostPosted: Sun May 01, 2005 5:53 pm    Post subject: Reply with quote

Both of these photographs are absolutely beautiful. After reading the article linked, it explains why these little pests are so hard to swat at times. Their form of internal guidance can be compaired to that of an air launched missile, where "pick-offs" or potentiometers are used to relay guidance information to the control surfaces from the navigational gyros. Cool eh! Very Happy Cool
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Charles Krebs



Joined: 13 Jul 2004
Posts: 1200
Location: Issaquah, WA USA

PostPosted: Sun May 01, 2005 8:27 pm    Post subject: Reply with quote

Piotr... these are both done with image "stacks" and HeliconF. The first one (2.5X objective) could probably have been done OK without it, the second one (10X objective) could not have.

Ken... I thought the link was pretty interesting as well. How would like to have been the guy trying to stick electrodes into specific flight muscles of a live fly? Neat stuff.
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Wim van Egmond



Joined: 08 Apr 2005
Posts: 440
Location: Rotterdam, the Netherlands

PostPosted: Tue May 03, 2005 2:51 am    Post subject: Reply with quote

Wonderful!

I have ask Charlie to do the work since the first test film with my new flash set up was all over exposed. It is good that I have so much patience. Very Happy

Wim
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Mike



Joined: 12 Dec 2004
Posts: 217
Location: Northeast Ohio, USA

PostPosted: Tue May 03, 2005 3:33 pm    Post subject: Reply with quote

Hello Charlie,

Wow! You take an ordinary subject and make an extraordinary photo.

Thanks, again.

All the best,

Mike
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lacerta



Joined: 12 Feb 2005
Posts: 139
Location: Georgia, USA

PostPosted: Fri May 06, 2005 11:42 am    Post subject: Reply with quote

One of the tests we had in zoology was to key insects. To complicate matters, most of them were just dismembered parts. The order Diptera was always a no brainer, because if you had a thorax with a haltere, you knew immediated it was a fly of some sort. Great shot Charles.
George
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GreenLarry



Joined: 07 May 2005
Posts: 360
Location: North East of England

PostPosted: Thu May 12, 2005 7:22 am    Post subject: Reply with quote

Wow, i thought the first pic was cool enough, then i saw the second one-fantastic!
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