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  • Oarisma
  • Poweshiek Skipperling (Oarisma poweshiek)
Poweshiek Skipperling (Oarisma poweshiek), (Parker, 1870) - 4006.000000 - 770153.000000 - Threatened

Wingspan: 2.5-2.8 cm.

Flight time: Univoltine, with adults flying from late June to late July. Rarely individuals have been observed emerging as early as mid June and as late as mid August.

Status: Rare breeding resident.

Distinguishing features: This squarish skipper is dark brown above with a golden forewing edge. The hindwing below is overscaled in white and has distinctive white veins contrasted to a dark anal margin. Females are slightly smaller and less distinctively marked.

Distribution and habitat: Although collections made prior to 1920 document this species as far south as Woodbury and Poweshiek counties, extant populations are today limited to the northern 2 tiers of counties. This species is limited to high quality, wet-mesic to xeric native prairie sites. Populations have proven susceptible to fire management, and may no longer be present on sites where they were seen as recently as a decade ago. The 2004 flight was absent in many of the known preserve sites, making it’s future in Iowa precarious.

Natural History: Larvae were observed feeding on Indian Grass (Sorghastrum nutans) at Cayler Prairie, but also feed on big bluestem (Andropogon gerardi) in the lab. The type location for this species was designated in 1870 as a prairie slope at Grinnell in Poweshiek County. It has not been observed there since. Populations have decreased at Cayler Prairie and other managed prairies in the state in the late 1980's, and may be on the verge of disappearing from both Howard County sites (Crossman and Hayden prairies). These isolated population reductions began following the reintroduction of fire to these sites, and fire has been shown to cause high levels of mortality in Wisconsin populations (Borkin 1995).


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Last updated on 2022-10-27 02:52:02
← Nyctelius nyctelius
Oligoria maculata →
Photos
Records
Record # Date Locale State Lat/Lon Collected By Count
308718 2008-07-04 Cerro Gordo County, Iowa Iowa Location Protected Jerry Selby 1
58620 2007-06-29 Cerro Gordo County, Iowa Iowa Location Protected Frank Olsen 1
58621 2007-06-19 Cerro Gordo County, Iowa Iowa Location Protected Frank Olsen 2
58619 2005-07-05 Cerro Gordo County, Iowa Iowa Location Protected Frank Olsen 1
58625 2005-06-23 Cerro Gordo County, Iowa Iowa Location Protected Jerry Selby 3
58612 2005-06-22 Howard County, Iowa Iowa Location Protected Frank Olsen 1
58616 2003-07-01 Osceola County, Iowa Iowa Location Protected Jessica Ski Davis 1
58611 2002-07-07 Howard County, Iowa Iowa Location Protected Frank Olsen 4
202691 2000-07-05 Dickinson County, Iowa Iowa Location Protected Jerry Selby 62
202690 2000-07-04 Dickinson County, Iowa Iowa Location Protected Jerry Selby 58
58626 1995-07-02 Cerro Gordo County, Iowa Iowa Location Protected Kirk Larsen 2
58648 1994-07-11 Osceola County, Iowa Iowa Location Protected Mike Saunders 1
58567 1994-07-06 Emmet County, Iowa Iowa Location Protected Mike Saunders 15
58585 1994-07-06 Osceola County, Iowa Iowa Location Protected Mike Saunders 4
247047 1994-07-05 Dickinson County, Iowa Iowa Location Protected Mike Saunders 6
107474 1994-07-05 Dickinson County, Iowa Iowa Location Protected Mike Saunders 1
247046 1994-06-29 O'Brien County, Iowa Iowa Location Protected Mike Saunders 150
107476 1994-06-29 Dickinson County, Iowa Iowa Location Protected Mike Saunders 1
58594 1994-06-26 Howard County, Iowa Iowa Location Protected Mike Saunders 25
58636 1994-06-23 Dickinson County, Iowa Iowa Location Protected Mike Saunders 5
58615 1993-07-25 Howard County, Iowa Iowa Location Protected Mike Saunders 1
58638 1993-07-25 Kossuth County, Iowa Iowa Location Protected Mike Saunders 2
58617 1993-07-21 Osceola County, Iowa Iowa Location Protected Mike Saunders 1
58618 1993-07-21 Osceola County, Iowa Iowa Location Protected Mike Saunders 2
58647 1993-07-21 Osceola County, Iowa Iowa Location Protected Mike Saunders 3
58632 1993-07-19 Dickinson County, Iowa Iowa Location Protected Mike Saunders 1
107467 1993-07-19 Dickinson County, Iowa Iowa Location Protected Mike Saunders 3
247045 1993-07-19 Dickinson County, Iowa Iowa Location Protected Mike Saunders 25
58566 1993-07-18 Emmet County, Iowa Iowa Location Protected Mike Saunders 5
58628 1993-07-18 Dickinson County, Iowa Iowa Location Protected Mike Saunders 5
58630 1993-07-18 Dickinson County, Iowa Iowa Location Protected Mike Saunders 1
58650 1993-07-18 Dickinson County, Iowa Iowa Location Protected Mike Saunders 10
107477 1993-07-18 Dickinson County, Iowa Iowa Location Protected Mike Saunders 1
107478 1993-07-18 Dickinson County, Iowa Iowa Location Protected Mike Saunders 2
315882 1993-07-18 Winneshiek County, Iowa Iowa Location Protected Dennis Schlicht 1
58574 1993-07-13 Dickinson County, Iowa Iowa Location Protected Mike Saunders 150
107462 1993-07-13 Hancock County, Iowa Iowa Location Protected Mike Saunders 2
58627 1993-07-12 Cerro Gordo County, Iowa Iowa Location Protected Mike Saunders 1
58644 1993-07-07 Dickinson County, Iowa Iowa Location Protected Mike Saunders 1
58600 1993-07-03 Dickinson County, Iowa Iowa Location Protected Mike Saunders 4
58599 1993-07-02 Dickinson County, Iowa Iowa Location Protected Mike Saunders 10
58575 1992-07-18 Dickinson County, Iowa Iowa Location Protected Tim Orwig 2
58579 1992-07-18 Dickinson County, Iowa Iowa Location Protected Tim Orwig 1
58586 1992-07-18 Osceola County, Iowa Iowa Location Protected Tim Orwig 2
58589 1992-07-18 Osceola County, Iowa Iowa Location Protected Tim Orwig 1
58604 1992-07-18 Dickinson County, Iowa Iowa Location Protected Tim Orwig 1
58605 1992-07-18 Dickinson County, Iowa Iowa Location Protected Tim Orwig 1
58640 1991-06-24 Palo Alto County, Iowa Iowa Location Protected Ron Harms 1
58641 1991-06-24 Palo Alto County, Iowa Iowa Location Protected Ron Harms 1
58642 1991-06-24 Palo Alto County, Iowa Iowa Location Protected Ron Harms 1
58580 1989-07-08 Dickinson County, Iowa Iowa Location Protected Tim Orwig 1
58613 1989-07-02 Howard County, Iowa Iowa Location Protected Jeff Nekola 1
107464 1989-07-02 Howard County, Iowa Iowa Location Protected Jeff Nekola 1
58601 1989-06-25 Dickinson County, Iowa Iowa Location Protected Ron Harms 4
58602 1989-06-25 Dickinson County, Iowa Iowa Location Protected Ron Harms 1
58603 1989-06-25 Dickinson County, Iowa Iowa Location Protected Ron Harms 1
58576 1988-06-30 Dickinson County, Iowa Iowa Location Protected Tim Orwig 2
58577 1988-06-30 Dickinson County, Iowa Iowa Location Protected Tim Orwig 1
58578 1988-06-30 Dickinson County, Iowa Iowa Location Protected Tim Orwig 1
58587 1988-06-27 Osceola County, Iowa Iowa Location Protected Tim Orwig 1
58588 1988-06-27 Osceola County, Iowa Iowa Location Protected Tim Orwig 1
58590 1988-06-27 Osceola County, Iowa Iowa Location Protected Tim Orwig 1
58634 1988-06-27 O'Brien County, Iowa Iowa Location Protected Tim Orwig 1
58573 1988-06-21 Dickinson County, Iowa Iowa Location Protected Jerry Selby 1
58646 1987-07-02 Osceola County, Iowa Iowa Location Protected John W Fleckenstein 1
58592 1987-06-14 Howard County, Iowa Iowa Location Protected Jeff Nekola 1
58624 1986-07-11 Cerro Gordo County, Iowa Iowa Location Protected Jeff Nekola 1
58595 1986-07-09 Dickinson County, Iowa Iowa Location Protected Dennis Schlicht 1
58607 1986-07-09 Hancock County, Iowa Iowa Location Protected Jeff Nekola 1
58608 1986-07-09 Hancock County, Iowa Iowa Location Protected Jeff Nekola 1
58643 1986-07-06 Dickinson County, Iowa Iowa Location Protected Jeff Nekola 1
107468 1986-07-06 Dickinson County, Iowa Iowa Location Protected Jeff Nekola 1
107473 1986-07-06 Dickinson County, Iowa Iowa Location Protected Jeff Nekola 1
58623 1986-07-04 Cerro Gordo County, Iowa Iowa Location Protected Jeff Nekola 1
58591 1986-06-26 Howard County, Iowa Iowa Location Protected Dennis Schlicht 1
58593 1986-06-26 Howard County, Iowa Iowa Location Protected Jeff Nekola 1
58606 1986-06-26 Howard County, Iowa Iowa Location Protected Jeff Nekola 1
58565 1986-06-21 Emmet County, Iowa Iowa Location Protected Jeff Nekola 1
58598 1986-06-21 Dickinson County, Iowa Iowa Location Protected Jeff Nekola 1
58629 1986-06-21 Dickinson County, Iowa Iowa Location Protected Jeff Nekola 1
107469 1986-06-21 Dickinson County, Iowa Iowa Location Protected Jeff Nekola 1
107479 1986-06-21 Dickinson County, Iowa Iowa Location Protected Jeff Nekola 1
58569 1985-07-09 Dickinson County, Iowa Iowa Location Protected Dennis Schlicht 1
58570 1985-07-09 Dickinson County, Iowa Iowa Location Protected Dennis Schlicht 1
58596 1985-07-09 Dickinson County, Iowa Iowa Location Protected Dennis Schlicht 1
58597 1985-07-08 Dickinson County, Iowa Iowa Location Protected Dennis Schlicht 1
58622 1984-08-07 Cerro Gordo County, Iowa Iowa Location Protected Ron Howe 1
58633 1984-07-09 Calhoun County, Iowa Iowa Location Protected Schenum 4
58645 1984-07-09 Osceola County, Iowa Iowa Location Protected John W Fleckenstein 1
58637 1984-07-04 Kossuth County, Iowa Iowa Location Protected Ron Howe 1
58635 1984-07-01 Calhoun County, Iowa Iowa Location Protected unknown source 1
58572 1980-07-11 Dickinson County, Iowa Iowa Location Protected J C Downey 1
58583 1980-07-09 Emmet County, Iowa Iowa Location Protected J C Downey 1
58571 1980-07-06 Dickinson County, Iowa Iowa Location Protected J C Downey 1
107465 1980-07-06 Dickinson County, Iowa Iowa Location Protected J C Downey 1
58568 1980-06-29 Dickinson County, Iowa Iowa Location Protected Dennis Schlicht 1
58584 1980-06-29 Emmet County, Iowa Iowa Location Protected J C Downey 1
107466 1980-06-29 Dickinson County, Iowa Iowa Location Protected D Hess 1
58609 1978-06-29 Howard County, Iowa Iowa Location Protected Balogh 1
58610 1976-07-05 Howard County, Iowa Iowa Location Protected Conway/Seaborg 1
58581 1970-07-14 Dickinson County, Iowa Iowa Location Protected Wittrock 1
271913 1969-12-31 Palo Alto County, Iowa Iowa Location Protected Ron Harms 4
58614 1968-07-13 Howard County, Iowa Iowa Location Protected J E Michael 3
4381 1950-07-01 Cerro Gordo County, Iowa Iowa Location Protected USGS - NPWRC 1
4382 1950-07-01 Dickinson County, Iowa Iowa Location Protected USGS - NPWRC 1
4383 1950-07-01 Emmet County, Iowa Iowa Location Protected USGS - NPWRC 1
4384 1950-07-01 Hancock County, Iowa Iowa Location Protected USGS - NPWRC 1
4385 1950-07-01 Howard County, Iowa Iowa Location Protected USGS - NPWRC 1
4386 1950-07-01 Kossuth County, Iowa Iowa Location Protected USGS - NPWRC 1
4387 1950-07-01 Page County, Iowa Iowa Location Protected USGS - NPWRC 1
4388 1950-07-01 Palo Alto County, Iowa Iowa Location Protected USGS - NPWRC 1
4389 1950-07-01 Poweshiek County, Iowa Iowa Location Protected USGS - NPWRC 1
4390 1950-07-01 Story County, Iowa Iowa Location Protected USGS - NPWRC 1
4391 1950-07-01 Woodbury County, Iowa Iowa Location Protected USGS - NPWRC 1
58631 1950-07-01 Linn County, Iowa Iowa Location Protected George Berry 1
58649 1950-07-01 Woodbury County, Iowa Iowa Location Protected Lindsey 1
107457 1950-07-01 Poweshiek County, Iowa Iowa Location Protected Hathaway 1
107458 1950-07-01 Poweshiek County, Iowa Iowa Location Protected Lindsey 1
107459 1950-07-01 Poweshiek County, Iowa Iowa Location Protected Lindsey 1
107460 1950-07-01 Poweshiek County, Iowa Iowa Location Protected Osborn 1
107463 1950-07-01 Howard County, Iowa Iowa Location Protected Ron Gatrelle 1
107470 1950-07-01 Dickinson County, Iowa Iowa Location Protected Klots 1
107471 1950-07-01 Dickinson County, Iowa Iowa Location Protected Lindsey 1
107472 1950-07-01 Dickinson County, Iowa Iowa Location Protected Opler 1
58639 1930-07-01 Story County, Iowa Iowa Location Protected Lindsey 1
107475 1930-06-26 Dickinson County, Iowa Iowa Location Protected McAlpine 1
107461 1930-06-21 Poweshiek County, Iowa Iowa Location Protected Parker 2
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