July 2025: Blacklighting at Engelmann Woods Natural Area

In late July, Chris Brown and I enjoyed a night of blacklighting at Engelmann Woods Natural Area in Franklin County, MO. Coincidentally, this was exactly one year to the day from a blacklighting session I had here in 2024. I have also done this during July in previous years at this same location. It is interesting seeing the patterns of the same moth species as well as others that might not have shown up to the sheet on previous occasions.

Here are a few insects that I thought I would share here.

We found at least four Eudryas gata (beautiful wood nymph) resting on vegetation nearby the lighted sheet. I feel this species is perfectly named. Although the adult form is technically a bird-dropping mimic, it is still beautiful along with the caterpillar.

Marathyssa inficita (dark marathyssa).
This is a bizarre little moth that is often attracted to our lights. This species caterpillar hosts on sumac (Rhus sp.) and poison ivy (Toxicodendron radicans).

Tarache aprica (exposed bird dropping moth) is a small but striking member of the Noctuidae family. The caterpillar, which I have yet to find, is also a bird dropping mimic.

Nadata gibbosa, the white-dotted prominent is a common Notodontid. We frequently find their caterpillars during our hunts on oak trees.

I have discovered that members of the Datana genus can be difficult to narrow down to species in both adult and larval forms. This moth pictured above exhibits patterns that could match D.  contracta, major, and drexelii. Perhaps having this specimen collected and in-hand, the species could be determined, but not with this single photo.

The find of the night for me was two beautiful Harrisimemna trisignata (Harris’s three-spot) moths. I have seen the adults before but never managed to get a good photograph. This is probably number one on my caterpillar list to find one day.

I believe this is the forth Dynastes tityus I’ve come across and they have all been females. Maybe next time, I hold on to a female in a cage to see if she can attract a male for me.

It seems that Eacles imperialis are now a sure thing at a blacklighting event at Engelmann Woods. Usually around midnight, you can expect at least a couple to visit.

That’s all from this night. I’m looking forward to a blacklighting session with the WGNSS group this coming weekend. It should be great and I will plan on sharing what we find here.

-OZB