Return to Berrien

by Carl Strang

Earlier this season I scouted some new sites in Berrien County, Michigan, and on Sunday I returned to see what singing insects I could find in the early portion of the peak season. A first quick stop at Mud Lake Bog produced a hoped-for population of sphagnum ground crickets, and I was reminded how utterly teeny tiny they are.

Most of the day, and a return trip in the evening, went into a place in the eastern part of the county called Chikaming Township Park. If this were Illinois, I wouldn’t expect much from a park district administered at the township level, but this is a good and well maintained site, and it yielded a pile of county records for my study. One of these was provided by a female curve-tailed bush katydid that flew to a landing right in front of me on one of the trails.

The dark-tipped green ovipositor with this shape and proportions, along with the katydid’s overall size and the habitat, permitted the identification.

The dark-tipped green ovipositor with this shape and proportions, along with the katydid’s overall size and the habitat, permitted the identification.

After release, she hung around long enough to let me take a single usable, if not absolutely sharp, photo.

After release, she hung around long enough to let me take a single usable, if not absolutely sharp, photo.

Perhaps the most bizarre observation came as a result of the day’s odd weather. I drove through intermittent rain to get to Berrien County, and waited out the last shower before going out onto the Mud Lake Bog boardwalk. Dark clouds remained until mid-afternoon, but they slowly drifted east and the sun was revealed at 4:00 local (eastern) time. Almost immediately, Chikaming’s swamp cicadas began to sing. These generally are limited to mornings, but here they were going in the late afternoon. This site proved to have the largest concentration I have encountered to date. At one point I wandered into a song battle taking place among a trio of males in a meadow with scattered tree saplings. One allowed a close approach.

None of our other cicadas matches the swamp cicada’s heavy black coloration.

None of our other cicadas matches the swamp cicada’s heavy black coloration.

Later in the evening I was able to pick up some additional species.

Among them was this Forbes’s tree cricket.

Among them was this Forbes’s tree cricket.

The highlight of the day, though, came at another site, Galien River County Park. I had set a goal for this season of listening for spotted ground crickets, which historically have been documented in several Chicago region counties, but which I had not noted to date. Described as a forest species, the spotted ground cricket’s song to my ear is similar to that of a common and widespread species, the Carolina ground cricket. I realized that while some of the forest crickets at Galien River indeed were Carolina ground crickets, others sounded a little different. I made recordings, and listened carefully, and was pleased to conclude that spotted ground crickets were there as well.

An example of a spotted ground cricket location.

An example of a spotted ground cricket location.

The songs have a similar tonal quality and pitch range to my ear. Where the Carolina ground cricket’s song is a steady purr with intervals of added overtones, the spotted ground cricket’s song is composed of regular pulses (about 4 per second), has no overtones, and lacks the continuous steady sound.

 

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Early Season Survey: Berrien County

by Carl Strang

I took last week as a vacation to do some early season singing insect surveying across the Chicago region. Monday took me to Berrien County, Michigan, which I had searched only once before late in the season. In addition to seeking the few species active this early, I wanted to scout some sites for their later-season potential. My first stop was Galien River County Park.

The start of the trail looked promising. The forest proved to be of good quality. I listened for northern wood crickets, but none were there.

The start of the trail looked promising. The forest proved to be of good quality. I listened for northern wood crickets, but none were there.

The park’s most spectacular feature is a wonderful canopy walkway, which ends in a platform overlooking the Galien River and moderate quality wetlands.

The park’s most spectacular feature is a wonderful canopy walkway, which ends in a platform overlooking the Galien River and moderate quality wetlands.

The walkway takes you into the upper canopy. I’m looking forward to getting back some evening later in the season.

The walkway takes you into the upper canopy. I’m looking forward to getting back some evening later in the season.

The marsh is cattail dominated, with reed canary grass invading, but has some potential for wetlands singing insects.

The marsh is cattail dominated, with reed canary grass invading, but has some potential for wetlands singing insects.

Another site new to my experience was Mud Lake Bog. Bogs are few in the region, so I had high hopes.

I was not disappointed. A boardwalk winds a good length through a high quality bog.

I was not disappointed. A boardwalk winds a good length through a high quality bog.

There was plenty of sphagnum moss, so I expect to add Berrien to the short list of counties in the region still harboring sphagnum ground crickets.

There was plenty of sphagnum moss, so I expect to add Berrien to the short list of counties in the region still harboring sphagnum ground crickets.

A final stop for the day was Warren Dunes State Park. Spring field crickets were common in the more sheltered spots of the outer dunes.

A final stop for the day was Warren Dunes State Park. Spring field crickets were common in the more sheltered spots of the outer dunes.

An early season delight is to spot the glowing yellow of hairy puccoons.

An early season delight is to spot the glowing yellow of hairy puccoons.

No need to enhance the color in a photo of these beauties.

No need to enhance the color in a photo of these beauties.

Though the day produced only 2 county species records, it was delightful for visits to familiar sites and the promise of the new ones.

 

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