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Stone cages
Today 08:55 AM
Today 09:47 AM
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11-18-2002, 04:30 PM
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84075
What is the only species of snake on the planet that can focus by changing the shape of it's lens and has 3D vision...acheived also by groves along the snout enabling stereo view? I need common and scientific name. Winner gets a date with #1stunner.
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11-18-2002, 04:35 PM
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84076
i would say the Boomslang (Dispholidus typus)
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11-18-2002, 05:23 PM
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84083
Ahetulla prasina
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11-18-2002, 05:41 PM
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84086
Hey frag, that would be Oriental Whip Snake/Green Vine Snake, depending on who you ask. I also thought that A. nasuta was capable of such, but I could be wrong about that. I believe there are others within that genus as well, at least four, no more than seven, but I can't remember them all.
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11-18-2002, 05:50 PM
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84090
OK, I just did a search engine cheat (google) and it turns out I was quite a bit off. I found eight different species of Ahaetulla-
Ahaetulla dispar
Ahaetulla fasciolata
Ahaetulla fronticincta
Ahaetulla mycterizans
Ahaetulla nasuta
Ahaetulla perroteti
Ahaetulla prasina
Ahaetulla pulverulenta
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11-18-2002, 06:13 PM
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84097
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11-18-2002, 06:19 PM
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84100
LONG-NOSE TREE SNAKE
Dryophis mycterizano
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11-18-2002, 06:22 PM
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84102
ding!!! jesse gets a date with #1stunner
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11-18-2002, 06:25 PM
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84103
A. prasina is the Oriental Whip Snake, A. nasuta is the long-nosed Whip Snake, A. fasciolata is the Speckle-headed Whip Snake, A. mycterizans is the Malayan Green Whip Snake.
They were dryophis a long time back.
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11-18-2002, 06:40 PM
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84108
Thanks Kohm [img]modules/Forum/images/smiles/icon_biggrin.gif[/img]
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11-18-2002, 06:55 PM
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84115
but none of them have the keen sense of depth perception that the Dryophis mycterizano has.
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11-18-2002, 07:09 PM
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84119
How exactly does it work, anyhow? Light expansion by retraction of the lens? I'm really interested in this now [img]modules/Forum/images/smiles/icon_biggrin.gif[/img]
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11-18-2002, 07:35 PM
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84125
Courtesy of good old EMBL:
Species:
Ahaetulla mycterizans
Synonyms:
Coluber mycterizans LINNAEUS 1758: 226
Dryophis xanthozonia BOIE 1827 (fide SMITH 1943)
Tragops xanthozonius - DUMÉRIL & BIBRON 1854: 826
Passerita mycterizans - GÜNTHER 1859: 231
Dryophis xanthozonia - BOULENGER 1896: 180 (fide SMITH 1943)
Ahaetulla mycterizans - LINK 1807
Coluber nasutus LACÉPÈDE 1789
Dryophis mycterizans - WALL 1921: 291
Passerita xanthozonia- SMITH 1930
Dryophis mycterizans - SMITH 1943: 376
Ahaetulla mycterizans - COX et al. 1998: 68
Subspecies:
Family:
Colubridae, Serpentes (snakes)
Distribution:
Indonesia (Java), Thailand, Laos, W Malaysia (incl. Pulau Tioman)
Terra typica: "America" (fide LINNAEUS 1758; in error)
Comment:
Named after Greek "mucterizo" = I turn up the nose.
photo: http://linnaeus.nrm.se/zool/herp/madserp.html.en
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11-19-2002, 01:39 AM
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84165
Chris...they have a more focused forward view and the cat like pupils not only change to allow more or less light in...but the lenses change shape to sharpen focus. Other snakes have eyes that are more or less fixed focus...and are not in tune with each other...in other words...their brain is regestering a left and a right image. Depth perception is impossible without stereo vision...like ours...both eyes combine the images they see and report to the brain as one. If our eyes were spread more apart and looking in different directions...we would see 2 images kinda like looking through binoculars that are too far spread apart. and we would be even worse drivers than we already are.
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11-19-2002, 02:58 PM
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84239
i also read that they use the grooves down their snout as rifle sights. also, that the rear-fanged bird snake (of course they didn't have the sci name...sigh) has similar visual abilities.
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11-19-2002, 09:39 PM
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84281
I saw that site skadi....I think they poorly worded another nickname for the same snake.
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