Return to Illinois Beach

by Carl Strang

A return to Illinois Beach State Park was called for last week, as my first visit was early enough in the season that more singing insects could have become active since. For instance, gray ground crickets were not singing yet in early August, but by last week they were active.

Gray ground crickets are common in the scattered clumps of grasses and other plants behind the Great Lakes beaches.

Hearing is not seeing, however, and despite my best efforts I could not expose a gray ground cricket for a photograph. They were in the larger patches of vegetation and trapped oak leaves, and it was too easy for them to sneak away when I tried lifting leaves and plant stems to look for the hidden singers. That disappointment was relieved somewhat by an amusing dung beetle.

It was having difficulty moving this far-from-spherical chunk.

I had better luck with grasshoppers. Some members of the grasshopper subfamily Oedipodinae are in the park. These qualify as singing insects, as their displays include wing-rattling flights. I found two species. One, a darker form, was in the savanna near the Dead River.

This appears to be a Boll’s grasshopper, a relatively dark individual of the species. The yellow and black hind wings are hidden when folded at rest.

The beach was another grasshopper habitat.

Some grasshoppers prefer this more open vegetation structure.

A common species was pale and well camouflaged.

This one appears to be a seaside grasshopper.

In the night, I followed a tree cricket’s song as it trilled in the gray ground cricket habitat.

The antenna spots don’t show here, but they clearly revealed that this was a four-spotted tree cricket.

Robust coneheads had become common in the campground woods.

This male sings from a patch of big bluestem grass within the savanna.

I found a few more species to add to the site list, but none were particularly uncommon.

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