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Least Shieldback
Least Shieldback in Geauga County. Photo by Linda Gilbert

Least Shieldback (Atlanticus monticola)

Occurrence

Uncommon

Habitat

Woodland edges

Range

I have only found adults in Geauga County to date, and Geauga Park District naturalists have found nymphs there as well. There are records of this shieldback in other counties in our region as well.

Physical description

Shieldbacks look significantly different from other katydids. They typically are shades of rich brown in color (though Wil Hershberger has photographed a green form of the Least Shieldback). They have plump bodies, short wings, and what looks like a substantial shield over the thorax. The Least Shieldback also has extremely short wings.

Song

Imagine short but steady shakes of a soft rattle repeated over and over with brief pauses between. The song is not easy to hear because it is so high. They typically sing in the evening and at night.

Least Shieldback Geauga County - Recording by Lisa Rainsong
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Adult season

I have found them in early July, but they are not common.

General description and context

Look and carefully listen along shrubby edges of woods or meadow tree lines. Watch for nymphs on the forest floor in open woods as well. This is a ground-level species, and they do not fly. They are also carnivorous and will eat other insects.

“Least” does not indicate that this shieldback is small. Both the Least and the Protean are round, stocky, substantial individuals. Although they don’t appear to be delicate whatsoever, keep them just above ground level if you should find one and pick it up in case it falls or is accidentally dropped. Serious injury can result.

Similar species

The Protean Shieldback’s song sounds similar except that it is much more continuous. The Least’s pattern of short rhythmic phrases sets it apart. Their appearance is similar, but the Least Sheildback's wings are even shorter than those of the Protean Shieldback.

Field observation:

Although these are nocturnal katydids, I heard and then located one singing in the afternoon at the base of goldenrod in the sun at Frohring Meadows in the Geauga Park District. Perhaps this was a very unusual individual, but this might be a possibility to keep in mind.

Songs of Insects

http://songsofinsects.com/katydids/least-shieldback

Singing Insects of North America:

http://www.entnemdept.ufl.edu/walker/buzz/287a.htm

Least Shieldback in context: photo by Linda Gilbert