yes, the cornutum little ones are difficult to find in Texas early in the summer or spring as well. they do not appear to venture out as much. adults and larger sub-adults are the most common that I have seen.
in all the years before I kept HL's, but noticed them in the field, I never recall seeing a small juvenile or hatchling! they were all mature. since I started taking an interest in them, noticing more, and keeping them the last few years; I rarely still see young ones...at any time of the year. most of the very young ones I have observed, have been in areas that were being disturbed by construction, demolition, ag. activity, or some other habitat shake up.
I was out in the bush all the time when I lived in the Witchita Falls area...but rarely found any this way, maybe a couple in a summer. but I did construction work for a while up there as well, putting up metal frame buildings in rural areas where there was little other development. at these places I must have found dozens of hatchlings and yearlings. it seemed I almost found at least one at every new job site! someone I have spoken with recently in west Texas, has also indicated that THL hatchlings are frequently noticed in or near stores & gas stations, etc. which border open undeveloped areas. they are moved outside and let go.
Mick
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"When tyranny and oppression come to this land, it will be in the guise of fighting a foreign foe."
James Madison