Paradoxes of Poweshiek Skipperling (Oarisma poweshiek) (Lepidoptera: Hesperiidae): Abundance Patterns and Management of a Highly Imperiled Prairie Species
Figure 5
O. poweshiek observation rates (individuals per hr except as noted) during 1988–1997, by site: (a) in northwestern Minnesota (Clay County) and adjacent southeastern North Dakota (Hartleben in Richland County), (b) west-central Minnesota (Chippewa, Douglas, Lyon, Pope, and Swift Counties), and (c) southwestern Minnesota (Lincoln and Pipestone Counties).
(a) Northwestern Minnesota and southeastern North Dakota