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For information on Wisconsin's rare animals, contact:
Rich Staffen
Conservation Biologist
608-266-4340

Ottoe Skipper (Hesperia ottoe)


Overview

Overview

Ottoe skipper (Hesperia ottoe), State Endangered butterfly, has been found in mixed and tallgrass prairie. Sites are in dry prairie in Wisconsin. Bluestem grasses are it's host plant and this species nectars on prickly pear, milkweeds, vetch, blazing star, leadplant, purple coneflower, compassplant and sunflowers. This species is univoltine, with adults flying in late June to early August. Peak is late June or early July. Overwintering occurs in the larval stage and pupation occurs in a loose cocoon amid debris.

State status

Note: Ottoe Skipper (Hesperia ottoe) was added to the Wisconsin E/T list on January 1, 2014 per administrative rule ER-27-11. Learn more

Status and Natural Heritage Inventory documented occurrences in Wisconsin

The table below provides information about the protected status - both state and federal - and the rank (S and G Ranks) for Ottoe Skipper (Hesperia ottoe). See the Working List Key for more information about abbreviations. Counties shaded blue have documented occurrences for this species in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where occurrences of this species meet NHI data standards and is not meant as a comprehensive map of all observations.

Note: Species recently added to the NHI Working List may temporarily have blank occurrence maps.


Documented locations of Hesperia ottoe in the Natural Heritage Inventory Database as of July 2015.
Summary Information
State StatusEND
Federal Status in Wisconsinnone
State RankS1
Global RankG3G4
Tracked by NHIY
WWAP SGCN

Species guidance


Ottoe Skipper (Hesperia ottoe) has very few known occurrences in the state and is of the highest priority for conservation; we encourage you to consult with your District Ecologist or an NHI Zoologist for specific recommendations for your site.

Identification: A folded-wing skipper that perches with the frontwing angled to the hindwing. The orange forewing of the male shows a dark diagonal line (the stigma) and females are darker above with areas of orange. Males: yellowish orange unmarked above and females are faded brown with pale tan markings. Both sexes are pale orange below and may or may not have some medial spots on the hindwings. Wingspan: 29-35mm.

Similar Species: The Delaware, Arogos, and Indian skipper are more bright yellow-orange below. Delaware and European skippers are completely without a spot band, Indian has a band of large yellow spots, and Arogos has pale veins. The male Leonard's pawnee is pale buff below with some small medial spots and the females hav the forewing spots squarish, not round. The Laurentian skipper is northern and has a pattern of clear white spots on a greenish/golden background below.

Habitat: Mixed and tallgrass prairie. Sites are in dry prairie in Wisconsin.

Nectar Source: Prickly pear, milkweeds, vetch, blazing star, leadplant, purple coneflower, compassplant, sunflower. Monarda fistulosa.

Host Plant: Bluestem grasses, Andropogon gerardi and A. scoparius. In MN observed ovipositing on purple coneflower (Echinacea angustifolia). In MI larvae found on witchgrass (Leptoma cognatum).

State Distribution: Southern Wisconsin, Monroe Co.

Global Distribution: Southern areas of Michigan, Wisconsin, Minnesota, and Manitoba. Populations in central Illinois and Missouri then west to Texas, Colorado and Montana.

Phenology: Adults fly late June to early August. Peak is late June or early July. Univoltine.

Life and Natural History: Univoltine. Mating often occurs in late afternoon and females oviposit in the afternoon. They land on the ground and walk up to a grass plant where they will lay a single egg on the base of the stem. Eggs may be on the flowers of purple coneflower. Like all Hesperia, larvae spin a shelter at the base of grasses and go out to feed. Overwintering occurs in the larval stage. Pupation occurs in a loose cocoon amid debris.

Photos/Video

Photos


Ottoe Skipper

Ottoe Skipper - Female below.

Photo © Ann Swengel.

Ottoe Skipper

Ottoe Skipper, male below.

Photo © Ann Swengel.

Ottoe Skipper

Male Ottoe Skipper.

Photo © Ann Swengel.

Ottoe Skipper

Female Ottoe Skipper.

Photo © Ann Swengel.

Ottoe Skipper

Ottoe Skipper, male above. Crawford County.

Photo © Mike Reese.


Wildlife Action Plan

Wisconsin Wildlife Action Plan graphic

Natural community (habitat) associations

The table below lists the natural communities that are associated with Ottoe Skipper. Only natural communities for which Ottoe Skipper is "high" (score=3) or "moderate" (score=2) associated are shown. See the key to association scores for complete definitions. Please see the Wildlife Action Plan to learn how this information was developed.

Natural community Score
Dry Prairie 3
Dry-mesic Prairie 2

Ecological landscape associations

The table below lists the ecological landscape association scores for Ottoe Skipper. The scores correspond to the map (3=High, 2=Moderate, 1=Low, 0=None). For more information, please see the Wildlife Action Plan.

This map shows the probability of Ottoe Skipper occurring in each of Wisconsin's Ecological Landscapes.  Actual scores can be found in the table to the left.


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Landscape-Community combinations of highest ecological priority*

Ecological priorities are the combinations of natural communities and ecological landscapes that provide Wisconsin's best opportunities to conserve important habitats for a given Species of Greatest Conservation Need. The 10 highest scoring combinations are considered ecological priorities and are listed below. More than 10 combinations are listed if multiple combinations tied for 10th place. For more information, please see the Wildlife Action Plan.


* Ecological priority score is a relative measure that is not meant for comparison between species. This score does not consider socio-economical factors that may dictate protection and/or management priorities differently than those determined solely by ecological analysis. Further, a low ecological priority score does not imply that management or preservation should not occur on a site if there are important reasons for doing so locally.

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Issues/threats and conservation actions

Conservation actions respond to issues or threats, which adversely affect species of greatest conservation need (SGCN) or their habitats. Besides actions such as restoring wetlands or planting resilient tree species in northern communities, research, surveys and monitoring are also among conservation actions described in the WWAP because lack of information can threaten our ability to successfully preserve and care for natural resources.

Threats/issues and conservations actions for rare animals

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Last revised: Thursday, August 22, 2019