Spring Clickers

Upland chorus frog in moss. Berkeley County, WV. ©Wil HershbergerIt is that time of year when the first frogs will be calling from the vernal ponds and streams here in West Virginia. One of my favorite sounds is that of the Upland Chorus Frog. These beautiful little frogs sing at night looking for mates in hopes of bringing the next generation into the world. Their upward pitched song, a rapid series of clicks, reminds some of the sound made by dragging a fingernail across the teeth of a comb.

I early March of 2009, I heard the following group of a dozen or so chorus frogs near my house. Moving every so slowly and quietly I made a furtive approach to the puddle where they were in concert. I placed the stereo mics close to the ground and very close to the edge of the water in hopes of creating a wide stereo field. Listening with headphones you would think that you were in the water with these guys:

A concert of upland chorus frogs in a vernal pond after dark. Berkeley County, WV. March 8, 2009. ©Wil Hershberger.0:00 / 0:00

A photo of Wil HershbergerIf you listen carefully you can hear that there are frogs calling from all around you. The stereo field was accentuated by having the mics so close to the frogs. They were spread out all around this small puddle of, perhaps, 10 feet in diameter.

I hope that you like this recording and the special circumstance under which it was made. The location is now an abandoned ATV race track. I doubt that I will hear any chorus frogs in that area this year – but there is hope that they will return. There is a new owner of the property and no ATVs have been run there for more than a year.

Upland Chorus Frog

May 2, 2010 in western Kentucky:

Major thunderstorms and gusty winds have raged across western Kentucky for the last three days, effectively delaying my work with birds. The one payoff: a couple of decent “frog nights” where I was able to collect some nice video and sound recordings.

On the night of May 1, I visited the Obion Creek Wildlife Management Area in the Mississippi lowlands near Milburn, Kentucky. There I focused my attention on a group of Upland Chorus Frogs (Pseudacris feriarum) calling from the edge of a flooded field next to the parking lot. Although a storm was blowing in and lightning was causing me some concern, I was able to get some very nice video clips (ultimately, a lightning strike nearby sent me packing!). Here are some highlights:

placeholder image for Upland Chorus Frog video

> HD version.

range map for upland chorus frogThe call of the Upland Chorus Frog is described as a clicking trill that sounds like someone running their finger across the teeth of a comb. It is quite similar to the calls of a number of other chorus frogs, including the Midland Chorus Frog (Pseudacris triseriata) of the upper Midwest, the Boreal Chorus Frog (Pseudacris maculata) that ranges north into Canada, the New Jersey Chorus Frog (Pseudacris kalmi) found in New Jersey and surrounding areas, the Cajun Chorus Frog (Pseudacris fouquettei) of the mid-South, and the Southern Chorus Frog (Pseudacris nigrita) of the southeastern states. The calls of these species vary with regard to pulse rate (timing of clicks within a call), but they are exceedingly difficult to identify in the field because their pulse rates vary with temperature.

In the background of the video, you can hear a large chorus of Cope’s Gray Treefrogs (Hyla chrysoscelis). Here is the mix of sound of the two species, as I heard it when I pulled into the parking lot. Listen also for the occasional nasal calls of a single Fowler’s Toad:

Chorus of Upland Chorus Frogs, Cope's Gray Treefrogs, and one Fowler's Toad, Obion Wildlife Management Area hear Milburn, Kentucky, 10:30 pm, May 2, 2010.0:00 / 0:00