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
State: Colorado
Records (tblMain - O. nigricornis) identified by song
Counties: Big Horn.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Sheridan.
State: Montana
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Broadwater, Fergus.
State: Wyoming
Records (tblMain - O. nigricornis) identified by song
Counties: Big Horn.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Boulder, El Paso, Jefferson, Logan.
Southwest Region
State: Oklahoma
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Craig.
Midwest Region
State: Illinois
Records (tblMain) identified by song
Counties: DuPage.
Records from Carl Strang, identified by song
Counties: Cook, Kane, Kankakee, Kendall, Lake, McHenry, Will.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Champaiagn, Coles, Cumberland, Edgar, Gallatin, Hardin, Jackson, Jo Daviess, Johnson, La Salle, Lawrence, Madison, Marion, Piatt, Pope, Rock Island, White, Whiteside, Winnebago.
State: Indiana
Records from Carl Strang, identified by song
Counties: Fulton, Jasper, Lake, LaPorte, Marshall, Newton, Porter, Pulaski, St. Joseph, Starke.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: 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.
State: Iowa
Records (tblMain) identified by song
Counties: Woodbury.
Records from Nancy Collins, identified by song
Counties: Dubuque.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Appanoose, Muscatine, Story, Winnebago.
State: Kansas
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Brown, Douglas.
State: Michigan
Records from Carl Strang, identified by song
Counties: Berrien.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Alger, Baraga, Cass, Charlevoix, Delta, Gogebic Iron.
State: Minnesota
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Hennepin.
State: Missouri
Records (tblMain) identified by song
Counties: Adair, Carter, Marion.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Vernon.
State: Nebraska
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Box Butte, Cherry, Cuming, Custer.
State: North Dakota
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Billings, Cass, Eddy, Ramsey.
State: Ohio:
Records (tblMain) identified by song
Counties: Franklin, Shelby.
O. nigricornis is also found in Franklin and Shelby counties.
Records from Lisa Rainsong, identified by song
Counties: 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.
State: South Dakota
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Bon Homme, Brookings, Lincoln, Yankton.
State: Wisconsin
Records from Carl Strang, identified by song
Counties: Kenosha, Racine, Walworth.
Records from Nancy Collins, identified by song
Counties: Dane, Forest, Grant.
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Champaign, Coles, Cumberland, Edgar, Gallatin, Hardin, Jackson, Jo Daviess, Johnson, La Salle, Lawrence, Madison, Marion, Piatt, Pope, Rock Island, White, Whiteside, Winnebago.
Southeast Region
State: Arkansas
Records (tblMain) based on literature or specimens
Counties: Fairfax, Highland, Loudoun.
State: Kentucky
Records (tblMain - O. nigricornis) based on literature or specimens
Counties: Muhlenberg.
Unassigned Records (tblMain) Based on Specimens or Literature
State: Kentucky:
Counties: Bourbon, Franklin, Harrison, Mason, Robertson, Scott.
State: Michigan:
Counties: 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.
State: North Carolina:
Counties: Ashe, Avery, Buncombe, Haywood, Watauga.
State: Ohio:
Counties: 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.
State: Tennessee:
Counties: Carter.
State: West Virginia:
Counties: Nicholas, Ritchie.
State: Virginia:
Counties: Giles, Wythe.
Last records update: 17 March 2024 tmy