Two images are attached.
Both were photographed in s Thialand on the Malaysia border. T. ultra is relatively common in the area. T. waterstradti is scarce in the area.
I think the first image is likely T. waterstradti, but I am unfamilair with the taxon.
The grouping of the spots on the forewing into groups of 5 and 2 seem to initially indicate T. waterstradti for both these images.
But I think the spots on the hindwing are too large in the second image, so I think second image is T. ultra.
Comparing the first image to the few images of T. waterstradti I can find in the literature and web, indicates the smaller spots in the hindwing, as well and the general layout of the spots in image 1 seem to match T. waterstradti.
I also note that the forewings on image 1 appear shorter and more rounded than on image 2. A differntiating feature?
However, I find an image of female T. ultra on Yutaka's website that has groups of 5 and 2 spots in the forewing. Though hindwing spots are still larg(ish) and evenly sized.
This creates confusion.
One thing I did notice about the individual in image 1, was its small size.
Is waterstradti smaller than ultra? I can find no size measurements anywhere.
Feedback appreciated please.
Three species can be rather similar & confusing. TAGiADES.png
FW apex with a series of five spots, 4, 5, 6, 7, & 8.
There are two spots which are often mistaken as a double cellspots.
They are actually costal spot 11 & the upper cellspot.
A lower cellspot may be present especially in the female but is nondiagnostic.
Identification of Tagiades waterstradti
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