leptraps
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Posts: 2,397
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Post by leptraps on Feb 8, 2020 14:15:44 GMT -8
For the past 10 years I have been studying Colias eurytheme. I am currently back tracking its origins. I believe there is a direct relationship between Colias croceus of Europe and Colias eurytheme of North America.
I would like to acquire 10 to 20 pairs of Colias croceus. A question of females. Does Colias croceus have white females as well as orange?
If you have specimens to sell or to trade for North American Colias eurytheme or Colias philodice, please let me know. Email me at Leptraps@aol.com.
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Post by nomihoudai on Feb 8, 2020 16:19:39 GMT -8
Colias croceus has white females known as f. helice.
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Post by luehdorf on Feb 12, 2020 1:34:18 GMT -8
On the island of Faial In the Azores, colias croceus has females in all colours from orange, to green, yellow, white and even brown.
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Post by Paul K on Feb 12, 2020 13:19:19 GMT -8
Very nice representation of this species.
So much colour variation, thanks for sharing
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Post by Adam Cotton on Feb 12, 2020 14:10:02 GMT -8
This is a great example of why collecting in series is so important for study purposes.
Adam.
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leptraps
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Post by leptraps on Feb 12, 2020 14:25:36 GMT -8
A year or so ago, I photographed and posted all my drawers of Speyeria. Once I have my collection in order, I will photograph my Colias Drawers.
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leptraps
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Post by leptraps on Feb 12, 2020 14:31:32 GMT -8
That is some drawer of Colias croceus! Are they that color variable? That is some variation.
What are the host plants?
Has anyone looked at the genitalia? I wonder if they are actually that variable.
Anyone intetested in trading specimens.
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Post by nomihoudai on Feb 12, 2020 15:42:49 GMT -8
They are only that variable on Faial island. They are not very variable in Europe. Except for the white form that can pop up every now and then.
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Post by luehdorf on Feb 12, 2020 16:45:34 GMT -8
leptraps yes they are only that variable on that island. The reason is that the island is isolated and genes of this colour variation exist in that isolated population, and there must have been millions of Colias croceus on that island. There were huge Alfalfa, or also called Lucerne fields (medicago sativa) and I heard from old collectors that these special colours like mint green or lemon yellow were very very very rare, but since there were literally thousands flying they specifically just spotted these colours and hunted them. Now the alfalfa fields are gone, and Colias croceus are rare on faial, so the colour variations are somewhere hidden in the gene pool. I’d love to trade with you, but I never collected any Colias croceus, here in Germany it’s a more or less rare migrant, never got a good spot for them.
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Post by trehopr1 on Feb 13, 2020 11:18:04 GMT -8
Wonderful drawer indeed !
I would also add that here is also a great example of effectively displaying ones captures / acquisitions for maximum "Appreciation" without the bad habit of "shingling" these lovely creatures.
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kristof56
Junior Member
Posts: 24
Country: FRANCE
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Post by kristof56 on Feb 19, 2020 9:23:13 GMT -8
Hello Leptraps, I could find you in the right season especially from August to October Colias croceus from France. There are two individual forms Colias croceus f.i helice, Colias croceus f.i helicina.
I have in collection these forms of Colias.
kristof.
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Post by jhyatt on Feb 20, 2020 7:09:56 GMT -8
Radusho's lovely series of Azorean C. croceus brings to mind a quote from a paper by my good friend Ulf Etischberger -- it ran something like
(pardon my poor Deutsch if I get the grammar wrong): "Ein Serie niemals zu lange sein." Good advice for researchers, but he doesn't say
what to do when you run out of house space to store them!
Cheers,
jh
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