2025 Caterpillar Season – Humped Oakworm

Humped Oakworm Moth
Symmerista sp. fam. Notodontidae
Host plant(s): Found on oak (Quercus sp.)
Date(s) and location(s): 18 September, 2025 – Council Bluff Lake, Iron County, MO; 27-September, 2025 – Caney Mountain Conservation Area, Ozark County, MO
Notes: Caterpillars of S. canicosta (red-humped oakworm) and S. albifrons (white-headed prominent) are indistinguishable as larvae and are so similar as adults that the only way to distinguish the two is by dissecting the genitalia. Both species are found in Missouri and both feed on the same host plants – beech, chestnut and oaks (any members of the Fagaceae).

2025 Caterpillar Season – Unicorn Caterpillar Moth

Unicorn Caterpillar Moth
Coelodasys unicornis fam. Notodontidae (Hodges#8007)
Host plant(s): redbud, hackberry, willow
Date(s) and location(s): 30 August, 2025 – Tyson Research Center, St. Louis County, MO; 06 September 2025 – Babler State Park, St. Louis County, MO; 15-September, 2025 – Creve Coeur Lake Park, St. Louis County, MO
Notes: Previous to this year, I assumed this species was an oak/hickory specialist. This is obviously not the case. This species is polyphagous and I was surprised at how many I found on willows this year. Look closely at the upper right photo in this gallery for signs that this individual was parasitized.

2025 Caterpillar Season – White-dotted Prominent

White-dotted Prominent
Nadata gibbosa fam. Notodontidae (Hodges#7915)
Host plant(s): Found on white oak (Quercus alba)
Date(s) and location(s): 25 September, 2025 – Council Bluff Lake, Iron County, MO
Notes: When threatened, caterpillars of this species curl their heads over their bodies exposing their large yellow, black-tipped mandibles.

2025 Caterpillar Season – Oblique Heterocampa

Oblique Heterocampa
Heterocampa obliqua fam. Notodontidae (Hodges#7983)
Host plant(s): Found on chinquapin oak (Quercus muehlenbergii)
Date(s) and location(s): 13 September, 2025 – Tyson Research Center, St. Louis County, MO
Notes: An oak specialist.

2025 Caterpillar Season – Harvey’s Prominent

Harvey’s Prominent
Litodonta hydromeli fam. Notodontidae (Hodges#7968)
Host plant(s): Found on gum bumelia (Sideroxylon lanuginosum)
Date(s) and location(s): 30 August, 2025 – Tyson Research Center, St. Louis County
Notes: Found primarily in Texas and Oklahoma, this species northeastern range limit appears to be the St. Louis area.

2025 Caterpillar Season – Wavy-lined Prominent

Wavy-lined Prominent
Cecrita biundata fam. Notodontidae (Hodges#7995)
Host plant(s): not recorded
Date(s) and location(s): 30 August, 2025 – Tyson Research Center, St. Louis County, MO
Notes: Click here to view adult of this species

2025 Caterpillar Season – Eastern White-blotched Heterocampa

Eastern White-blotched Heterocampa
Heterocampa pulverea fam. Notodontidae (Hodges#7990.1)
Host plant(s): Found on red oak sp. (Quercus sp.)
Date(s) and location(s): 18 Sep, 2025 – Council Bluff Lake, Iron County, MO
Notes: As great of a resource as Wagner’s Caterpillars of Eastern North America has been for me, I have to keep reminding myself that it was published in 2005. Taxonomists have been hard at work on a number of taxa since then, and I often struggle with how to find out whether a particular taxon has changed. It recently came to my attention that today’s species, once considered a subspecies of Heterocampa umbrata, was revised in 2021 and given specific status. The common names for these two species are confusing. H. umbrata, which is found in Florida and southeastern Georgia, keeps its name of white-blotched heterocampa, while H. pulverea, which is found throughout eastern U.S. and Canada is now called eastern white-blotched heterocampa.

2025 Caterpillar Season – Sigmoid Prominent

Sigmoid Prominent
Clostera albosigma fam. Notodontidae (Hodges#7895)
Host plant(s): Found on willow (Salix sp.)
Date(s) and location(s): 16 Sep, 2025 – Johnson’s Shut-ins State Park, Reynolds County, MO
Notes: The first of this species’ caterpillar I have seen, Pete and I found this while doing some beating on willows. This species also hosts on poplar. The sigmoid prominent can be found over most of the U.S. and Canada, but is most concentrated in the Northeastern and upper Midwest regions. At first glance, this individual looks pretty plain, but on closer inspection the colors and patterns are downright striking. From other photos I have seen, these caterpillars are quite variable in appearance.

2025 Caterpillar Season – Drab Prominent

Drab Prominent
Misogada unicolor fam. Notodontidae (Hodges#7974)
Host plant(s): sycamore (Platanus occidentalis)
Date(s) and location(s): 23, 30 Aug, 2025 – Tyson Research Center, St. Louis County, MO; 27 Sep, 2025 – Caney Mountain Conservation Area, Ozark County, MO
Notes: The drab prominent is the only species in the monotypic genus Misogada. Named for the relatively plain looking adult, the caterpillar of this species in anything but drab. In addition to sycamore, this species also hosts on cottonwood.

2025 Caterpillar Season – Saddled Prominent

Saddled Prominent
Cecrita guttivitta fam. Notodontidae (Hodges#7994)
Host plant(s): Found on hickory (Carya sp.)
Date(s) and location(s): 30 Aug, 2025 – Tyson Research Center, St. Louis County, MO
Notes: A highly polyphagous species, known to feed on a wide variety of woody plants across many families.