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Post by akcolias on Mar 13, 2024 1:02:58 GMT
This is the typical green sulphur of Arctic Alaska; it comes in a lot of forms and overlaps a lot with C. nastes. But I think these are all thula. In the area I collect, individuals with yellow/orange wash on the FW make up around 20% of the population, but this one has unusually thick dark borders on the wings.  |
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Post by bobw on Mar 13, 2024 13:13:35 GMT
Colias tyche is a very variable species, and ssp. thula especially so, even within the same locality, possibly due to hybridisation with sspp. kolosovae and boothii. These are all specimens of it. Here are the series I collected in Alaska, both are from the Dalton Highway, those on the left from the North Slope, those on the right from just south of the Brooks range, the bottom few were captive bred. 
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Post by akcolias on Mar 13, 2024 15:47:43 GMT
Thank you for the information. I see many of the north slope specimens were collected near the ice cut. That is one of my favorite collecting locations. Did you by chance see any parnassians there? That is as far north as I have seen one, but have never been able to catch up to one there.
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Post by bobw on Mar 13, 2024 16:28:27 GMT
Yep, the Ice Cut's a great collecting locality. I did see one or two P. eversmanni there.
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