Forbes's tree cricket
Oecanthus forbesi
Records for the above map are from tblMain, Lisa Rainsong, Carl Strang, and Nancy Collins.
Oecanthus forbesi and O. nigricornis are morphologically indistinguishable but can be identified by their calling songs. In the above map, filled circles represent counties where species were identified by song (red for O. forbesi, blue for O. nigricornis, and gold for counties where both species are found). Open circles represent counties where records were based on specimens or literature. These records were assigned to O. forbesi (red open circles) if they occurred west of Ohio and O. nigricornis (blue open circles with cross) if they were east of Ohio. Records in Ohio were unassigned (open grey circles) because both species occur in this region. Records in counties in states aligned with Ohio (Kentucky, Michigan, North Carolina, Virginia, and West Virgnia) were unassigned.
Records for the map of Ohio are from tblMain and Lisa Rainsong.
Oecanthus forbesi and Oecanthus nigricornis are morphologically indistinguishable but separable on the basis of their calling songs. Dots show county records of O. forbesi that are based on tape-recorded males. East of the shaded area, tapes of males of nigricornis/forbesi morphology have proved to be O. nigricornis except for one record from eastern New York. West of the shaded area, no forbesi males have been taped.
The above map for O. forbesi and its associated content was created in 2003, based on records from tblMain, by Tom Walker. This map page remained on SINA until May 2024, when the page was updated to its present form.
Summary of Species' Distribution
Oecanthus forbesi is found west of Ohio and in Ohio where it co-exists with O. nigricornis.
List of States and County Records
Map of
United States
Regions
Map of United States Regions
Records from tblMain based on specimens or literature that are in [brackets] are counties where O. forbesi has been identified by song.
West Region
Colorado
Records (tblMain - O. nigricornis) identified by song
Big Horn.
Records (tblMain - O. nigricornis) based on literature or specimens
Sheridan.
Montana
Records (tblMain - O. nigricornis) based on literature or specimens
Broadwater, Fergus.
Wyoming
Records (tblMain - O. nigricornis) identified by song
Big Horn.
Records (tblMain - O. nigricornis) based on literature or specimens
Boulder, El Paso, Jefferson, Logan.
Southwest Region
Oklahoma
Records (tblMain - O. nigricornis) based on literature or specimens
Craig.
Midwest Region
Illinois
Records (tblMain) identified by song
DuPage.
Records from Carl Strang, identified by song
Cook, Kane, Kankakee, Kendall, Lake, McHenry, Will.
Records (tblMain - O. nigricornis) based on literature or specimens
Champaiagn, Coles, Cumberland, Edgar, Gallatin, Hardin, Jackson, Jo Daviess, Johnson, La Salle, Lawrence, Madison, Marion, Piatt, Pope, Rock Island, White, Whiteside, Winnebago.
Indiana
Records from Carl Strang, identified by song
Fulton, Jasper, Lake, LaPorte, Marshall, Newton, Porter, Pulaski, St. Joseph, Starke.
Records (tblMain - O. nigricornis) based on literature or specimens
Brown, Cass, Clinton, Delaware, Franklin, Grant, Greene, Jackson, Jennings, Kosciusko, LaGrange, Lawrence, Madison, Marion, Monroe, Montgomery, Morgan, Pike, Posey, Putnam, Randolph, Shelby, Tippecanoe, Union, Vigo, Wayne, Wells, White, Whitley.
Iowa
Records (tblMain) identified by song
Woodbury.
Records from Nancy Collins, identified by song
Dubuque.
Records (tblMain - O. nigricornis) based on literature or specimens
Appanoose, Muscatine, Story, Winnebago.
Kansas
Records (tblMain - O. nigricornis) based on literature or specimens
Brown, Douglas.
Michigan
Records from Carl Strang, identified by song
Berrien.
Records (tblMain - O. nigricornis) based on literature or specimens
Alger, Baraga, Cass, Charlevoix, Delta, Gogebic Iron.
Minnesota
Records (tblMain - O. nigricornis) based on literature or specimens
Hennepin.
Missouri
Records (tblMain) identified by song
Adair, Carter, Marion.
Records (tblMain - O. nigricornis) based on literature or specimens
Vernon.
Nebraska
Records (tblMain - O. nigricornis) based on literature or specimens
Box Butte, Cherry, Cuming, Custer.
North Dakota
Records (tblMain - O. nigricornis) based on literature or specimens
Billings, Cass, Eddy, Ramsey.
Ohio:
Records (tblMain) identified by song
Franklin, Shelby.
O. nigricornis is also found in Franklin and Shelby counties.
Records from Lisa Rainsong, identified by song
Cuyahoga, Erie, Geauga, Lake, Lorain, Medina, Ottowa, Portage, Richland, Stark, Summit.
O. nigricornis is also found in Cuyahoga, Erie, Geauga, Lake, Portage, Richland, and Stark counties.
South Dakota
Records (tblMain - O. nigricornis) based on literature or specimens
Bon Homme, Brookings, Lincoln, Yankton.
Wisconsin
Records from Carl Strang, identified by song
Kenosha, Racine, Walworth.
Records from Nancy Collins, identified by song
Dane, Forest, Grant.
Records (tblMain - O. nigricornis) based on literature or specimens
Champaiagn, Coles, Cumberland, Edgar, Gallatin, Hardin, Jackson, Jo Daviess, Johnson, La Salle, Lawrence, Madison, Marion, Piatt, Pope, Rock Island, White, Whiteside, Winnebago.
Southeast Region
Arkansas
Records (tblMain) based on literature or specimens
Fairfax, Highland, Loudoun.
Kentucky
Records (tblMain - O. nigricornis) based on literature or specimens
Muhlenberg.
Unnasigned Records (tblMain) Based on Specimens or Literature
Kentucky:
Bourbon, Franklin, Harrison, Mason, Robertson, Scott.
Michigan:
Alcona, Antrim, Barry, Bay, Benzie, [Berrien], Calhoun, Charlevoix, Cheboygan, Clinton, Crawford, Emmet, Genesee, Gladwin, Grand Travers, Gratiot, Hillsdale, Huron, Ingham, Iosco, Isabella, Jackson, Kalkaska, Kent, Lake, Lapeer, Lenawee, Livingston, Mackinac, Manistee, Midland, Missaukee, Monroe, Montcalm, Montgomery, Montmorency, Muskegon, Oakland, Oscoda, Otsego, Presque Isle, Roscommon, Saginaw, St. Clair, Washtenaw, Wayne, Wexford.
North Carolina:
Ashe, Avery, Buncombe, Haywood, Watauga.
Ohio:
Allen, Ashtabula, Belmont, Brown, Butler, Carroll, Champaign, Clermont, Darke, Delaware, [Erie], Fairfield, Fulton, Gallia, [Geauga], Guernsey, Hamilton, Hardin, Hocking, Huron, Jackson, [Lake], Licking, Logan, [Lorain], Lucas, Madison, Marion, Mercer, Miami, Montgomery, Morrow, Muskingum, Ottawa, Pickaway, [Portage], Preble, [Richland], Ross, [Stark], [Summit], Tuscarawas, Warren, Washington, Wayne, Williams, Wood, Wyandot.
Tennessee:
Carter.
West Virginia:
Nicholas, Ritchie.
Virginia:
Giles, Wythe.
Last records update: 17 March 2024 tmy