by Carl Strang
Last year I recorded an insect song that was much like that of the dusky-faced meadow katydid, at the Bob Kern Natural Area in Fulton County, Indiana. My note from August 31: “I made recording 28 of an interesting meadow katydid that was producing long, loud series of ticks that were irregular but sometimes sort of doubled, followed by a buzz longer than that of a nearby black-leg. It best matches reference recordings of dusky-faced.” A channel too deep and wide for me to cross prevented my getting close enough to see the singer, but I secured a permit to go in there this year. Circumstances delayed me until the last Sunday in September. The marsh has that important quality that seems essential for the rarer wetland meadow katydids: a lack of invasive plants.
I found two grasshoppers of interest. One was a singing species.
The other I thought might belong to the same subfamily, as it had a strongly slanting face.
Later I was glad that I had followed my practice of taking photos of many parts of the grasshopper, from many angles.
It turns out that this species belongs to a small subfamily, the silent slant-faced grasshoppers: a nice wetland insect, but not a singer. I slogged on across the marsh, but the only meadow katydids were numerous black-legs, a common species. I should try again earlier in the season next year, but I have to consider the possibility that the recorded insect was an aberrant black-leg.
I headed up to LaPorte County, which I had not surveyed as well as most of the others in my 22-county region. I had visited the Kingsbury Fish and Wildlife Area earlier in the season, and hoped to pick up some county records there from this late date. Indeed I was to end up with 7, but one in particular needs to be related here. One marsh that is adjacent to the Kankakee River has a levee easily walked, so I checked it out, listening with the SongFinder.
I heard an unusual meadow katydid song at one point. The buzz was very long, 6 seconds or more, often with long spaces between, and 6 or 7 ticks leading into the buzz. I couldn’t hear it unaided at a distance, but through the SongFinder it was distinctly louder than the songs of nearby short-winged meadow katydids. I slowly moved in closer, needing to be patient and sit still when the singer paused for longer periods, possibly because of my approach.
In other words, the species I had set out to find in Fulton County showed up in LaPorte County.
I could hear it unaided when I was within 3-5 feet, but the lesson yet again was the necessity of using the SongFinder pitch-lowering hearing aid when searching for these rarer wetland katydids.