I was walking in the grass near the Trinity Trail in Fort Worth, Texas about two weeks ago, and saw these tiny purple streaks flitting about at mid-calf level that turned out to be butterflies. I followed and tried to get lots of pictures, but the butterflies were quite fast and tiny, and I only got one decent close-up.

Blue/purple butterfly overwings

Its wings were a dull brown/gray colour when closed, but I couldn't get any better pictures than this grainy one.

Dull folded wings

Because of how fast it was moving, I couldn't really estimate size reliably, but it was probably slightly wider than the width of my thumbnail when its wings were open. With its wings closed, the height of the butterfly was about the longest height of my thumbnail. These are very rough estimates.

It looked quite a bit like the linked picture of a purple moonbeam—one of Google Lens's suggestions—but those seem to be Australian butterflies.

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    $\begingroup$ No, not much size variation. Try LYCAENIDAE (gray wings belong to this family as well.) There are smaller ones (called "blues") very similar to gray hairstreaks, e.g.the Echo Blue. Hard to find the distribution, though, but definitely Southern N.A. $\endgroup$ Nov 23 at 17:27
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    $\begingroup$ @anongoodnurse, thanks! Google Lens also turned up Echo Blue as a suggestion, but, as you say, I couldn't find information about their geographic distribution, or even a picture like you offer. The size seems right, so it could be! Searching also turned up the Melissa Blue, whose overwings look just right, but not the underwings. $\endgroup$
    – LSpice
    Nov 23 at 17:31


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