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Post by thanos on Oct 17, 2012 10:04:13 GMT -8
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Post by africaone on Oct 17, 2012 11:18:00 GMT -8
the guy is not up-to-date ! this form is quite rare in Congo despite not in cameroon. may he didn't know that  it seems that he believes it extremely wanted ! |
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Post by nosorog on Oct 17, 2012 11:40:45 GMT -8
I also noticed these listings. I thought he meant $60, but made a mistake.
He relisted his "blue" hercules many times already.
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Post by dertodesking on Oct 17, 2012 12:37:25 GMT -8
$6,000...  LOL...what, no one on here gonna buy? ;D Simon |
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Post by timoinsects on Oct 17, 2012 14:10:42 GMT -8
it's not strange on the over priced Goliathus,
because there're always 'strange' people possible to pay such bill so makes speculators available. ;D
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matt
New Member
Posts: 10
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Post by matt on Nov 3, 2012 12:03:24 GMT -8
The funny thing is, all Dynastes hercules lychi go "blue" if the specimen dries out, I have the broken remains of a "blue" male here that I used for breeding. The elytra of Dynastes beetles has a complex structure where the colours change depending on the amount of water within tiny spaces in the elytra - spray a "blue" beetle with water and it will go back to dark brown very quicky and will only slowly recover the "blue" colour as it takes time to dry completely .
Perhaps I should glue my "blue" specimen back together and put it on e-bay myself....
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Post by thanos on Nov 3, 2012 17:33:30 GMT -8
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Post by thanos on Nov 24, 2012 0:26:02 GMT -8
'all Dynastes hercules lychi go "blue" if the specimen dries out'
- I don't think so, most D. hercules are brownish both when alive and dried. Only a small percentage are blueish/greyish/greenish and the color doesn't change when they become dried (is the same as alive). Now, when you put them to swim in water for rehydration, either they are brown or blue, will darken, but when you take them out of the water and mount them, soon the elytra will come back to blue (if were blue before the rehydration) or brown (if that was their color before rehydration). D. granti which has blue-grey both the elytra and pronotum, when put for rehydration, both pronotum and elytra darken, but come back to blue-grey very soon (within minutes) after you take them from the water.
'The elytra of Dynastes beetles has a complex structure where the colours change depending on the amount of water within tiny spaces in the elytra'
- Yes, the colors change with humidity, but temporarily, and depending on the duration the beetles are exposed to high humidity (if they change to environment where humidity is much lower, the elytra become for example from blackish that they were under high humidity, brown). Also, the black spots on their elytra are possibly the result of trapped water at certain areas between the tiny spaces in the elytra, which can't evaporate. But, most elytral area can't trap water, so if you put a specimen for rehydration, it will regain its color after you take it from the relaxer. The black spots also, will emerge again at the same areas they were before puting for relaxing, as in that areas there is trapped water that can't evaporate.
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matt
New Member
Posts: 10
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Post by matt on Dec 5, 2012 16:16:35 GMT -8
'all Dynastes hercules lychi go "blue" if the specimen dries out' - I don't think so, most D. hercules are brownish both when alive and dried. Only a small percentage are blueish/greyish/greenish and the color doesn't change when they become dried (is the same as alive). . The "lychi" subspecies of Dynastes hercules is known as the "blue hercules beetle". I will amend my statement to "some DHL go blue when the specimen dries out. Here is my male when alive - nice and brown:  Here are the remains of my male after they have been kept dry for some time - photo taken today.  I'd say that was blue. |
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Post by thanos on Dec 5, 2012 19:36:13 GMT -8
Thank you for the photos - I didn't know this.
But how is this explained ? Is this color change due to water evaporation from the elytral cuticle when the specimen dries ? If that was the case, then all the brown (when alive) specimens would change to blue when dead and fully dried. I have seen alive blue hercules (and not only of the ssp. lichyi) and they didn't change color after they became fully dried. Also, the usual brown (when alive) males I know, didn't change to blue when fully dried. I guess this happens rarely. But how can be explained ? The only ''changes'' in the elytral colors of Dynastes I'm aware of (of course except for the ones that happen on a freshly emerged beetle, where the whitish soft elytra become dark with hardening) are ''black darkenings'' cause of humidity (when a dried specimen is put for rehydration, or when an alive is put in an environment of high humidity), which are only temporary..The visible color there changes cause of light refraction in the micro-holes of the cuticle, depending on when they are filled with water (then the color becomes black) or air (in dry state).
But, in the case of your specimen, I think that the color became from brown blue, cause of changes in the pigments.
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Post by lucanidae25 on Dec 5, 2012 19:48:41 GMT -8
It's not due to water but the amount of UV or sun light. You can turned any hercules blue by exposed them to UV light. I've done it before by exposing my hercules under UV lights for more than 2 months and it turned blue.
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Post by thanos on Dec 5, 2012 21:50:44 GMT -8
lucanidae25, I thought of the sun discoloring, too. So, change in the pigments.
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Post by lucanidae25 on Dec 6, 2012 3:05:04 GMT -8
Yes, sun light has UV too. Sun or UV light will destroy the yellow pigments that makes up the green and only leaving the blue behind.
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Post by exoticimports on Dec 6, 2012 12:41:39 GMT -8
I've had DHL for over 30 years and none turned blue. They are stored in a Cornell drawer that sees little light, humidity typically about 40%-65%
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