Amblyscirtes oslari
(Skinner, 1899)
Oslar's Roadside-Skipper, Oslar's roadside skipper
Amblyscirtes oslari, commonly known as Oslar's Roadside-, is a small skipper in the . It occupies a broad range across the North Great Plains and Rocky Mountains, from southern Canada to the southwestern United States. The exhibits latitudinal variation in its , with a single in northern and two generations in southern populations. Both larval and stages have documented associations: feed exclusively on grama grass, while adults visit flowers for nectar.
Pronunciation
How to pronounce Amblyscirtes oslari: /ˌæmblɪˈskɜrtiːz ˈoʊzlæraɪ/
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Identification
Distinguished from other Amblyscirtes by geographic range and preference. Within its range, may be confused with other roadside ; specific diagnostic characters not detailed in available sources. The combination of small size (22–35 mm wingspan), grassland habitat in the Great Plains and Rocky Mountain regions, and period from May to July may aid in field identification.
Images
Appearance
Small with wingspan of 22–35 mm. Typical skipper with relatively large , stocky body, and hooked . pattern and coloration details not explicitly described in available sources.
Habitat
Occupies high plains and Rocky Mountain , including grasslands and open areas. Associated with grama grass (Bouteloua gracilis), the larval , which is a grass in shortgrass prairie . have been observed in roadside environments and open grassy areas.
Distribution
North America from southern Alberta and Saskatchewan in Canada, south through North Dakota, the high plains and Rocky Mountains to Arizona, New Mexico, and south Texas in the United States.
Seasonality
are active from May to July. One per year occurs in northern parts of the range; two generations per year in southern parts.
Diet
feed exclusively on grama grass (Bouteloua gracilis). feed on flower nectar; recorded visiting Penstemon, Cirsium (thistles), and Verbena.
Host Associations
- Bouteloua gracilis - larval grama grass; sole documented larval
- Penstemon - nectar source
- Cirsium - nectar sourcethistle
- Verbena - nectar source
Life Cycle
with , , , and stages. One annually in northern range (Canada, northern Great Plains); two generations annually in southern range (Arizona, New Mexico, Texas). Specific details of egg, larval, and pupal stages not documented in available sources.
Behavior
are and visit flowers for nectar. Males of related Amblyscirtes have been observed perching in low areas early in the morning, though this has not been explicitly documented for A. oslari.
Ecological Role
function as on grasses. may contribute to of flowering plants while feeding on nectar. Serves as for various including birds, , and other .
Human Relevance
No significant documented economic or agricultural impact. Of interest to and naturalists due to its restricted association with prairie . Not known to be a .
Similar Taxa
- Amblyscirtes nysaSimilar (Nysa Roadside-) and preference; distinguished by different geographic range (more southeastern, extending into Oklahoma, Kansas, and Texas but not reaching the northern Great Plains or Rocky Mountains)
- Amblyscirtes hegonAnother roadside in the same with overlapping range in parts of the Great Plains; specific distinguishing characters not detailed in available sources
More Details
Nomenclatural History
Originally described as Pamphila oslari by Skinner in 1899. Has been placed in the Mastor by some authorities, but currently accepted as Amblyscirtes oslari.
Conservation Status
Not formally assessed by major organizations. Dependence on shortgrass prairie may make vulnerable to habitat conversion and degradation.