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Harbison's Dun Skipper Euphyes vestris

Goal: Protect, enhance, and restore Harbison's dun skipper occupied habitat, historically occupied habitat, and the landscape connections between them to create resilient, self-sustaining populations that provide for persistence over the long-term (>100 years).

regional PRE 2018, 2019, 2020, 2021 SL
MGT-IMP-MGTPL EYPHAR-6

Management units: 3, 4, 5, 6, 8, 11

Beginning in 2018, implement highest priority management actions identified in the Harbison's Dun Skipper Management Plan.

Action Statement Action status Projects
IMP-1 Submit project metadata, management datasets, and report to the MSP Web Portal. waiting for precedent action
Criteria Deadline year
By 2022, =1 High Priority Management Action Implemented from the Harbison's Dun Skipper Management Plan 2021
Threat Name Threat Code
Altered fire regimeALTFIR
Altered hydrologyALTHYD
Climate changeCLICHN
Invasive animalsINVANI
Invasive plantsINVPLA
Urban developmentURBDEV
Code Obj. code Statement
EYPHAR-5 MGT-PRP-MGTPL In 2017, prepare a 5 year Harbison's Dun Skipper Management Plan that includes the results from butterfly surveys and habitat assessments, genetic and marking studies, and climate and fire modeling to characterize habitat quality at occupied occurrences and unoccupied suitable habitat important for enhancing connectivity, expanding populations or that could serve as fire and climate refugia. The plan should include an overall management strategy, identification and prioritization of sites where management is needed, and specific management recommendations for each site. It should also include actions to reduce fire risk at prioritized occurrences and specifications for monitoring the effectiveness of implementing high priority management actions.
EYPHAR-7 MON-IMP-MGTPL Beginning in 2018, monitor effectiveness of implementation of highest priority management actions identified in the Harbison's Dun Skipper Management Plan.
regional PRE 2018, 2019, 2020, 2021 SL
MON-IMP-MGTPL EYPHAR-7

Management units: 3, 4, 5, 6, 8, 11

Beginning in 2018, monitor effectiveness of implementation of highest priority management actions identified in the Harbison's Dun Skipper Management Plan.

Action Statement Action status Projects
IMP-1 Submit metadata, management effectiveness datasets, analyses, and report to the MSP Web Portal. waiting for precedent action
Criteria Deadline year
Effectiveness of High Priority Management Actions Determined 2021
Threat Name Threat Code
Altered fire regimeALTFIR
Altered hydrologyALTHYD
Climate changeCLICHN
Invasive animalsINVANI
Invasive plantsINVPLA
Urban developmentURBDEV
Code Obj. code Statement
EYPHAR-5 MGT-PRP-MGTPL In 2017, prepare a 5 year Harbison's Dun Skipper Management Plan that includes the results from butterfly surveys and habitat assessments, genetic and marking studies, and climate and fire modeling to characterize habitat quality at occupied occurrences and unoccupied suitable habitat important for enhancing connectivity, expanding populations or that could serve as fire and climate refugia. The plan should include an overall management strategy, identification and prioritization of sites where management is needed, and specific management recommendations for each site. It should also include actions to reduce fire risk at prioritized occurrences and specifications for monitoring the effectiveness of implementing high priority management actions.
EYPHAR-6 MGT-IMP-MGTPL Beginning in 2018, implement highest priority management actions identified in the Harbison's Dun Skipper Management Plan.
regional PRE 2019, 2020, 2021 SL
MGT-IMP-IGNPL EYPHAR-8

Management units: 3, 4, 5, 6, 8, 11

Beginning in 2019, implement high priority MSP 2018 Wildfire Ignition Reduction Plan measures developed for Harbison's Dun Skipper to reduce the probability of ignition at most at-risk occurrences.

Action Statement Action status Projects
IMP-1 Submit project metadata, management datasets, and report to the MSP Web Portal. waiting for precedent action
Criteria Deadline year
By 2023, =1 High Priority Management Action Implemented for Harbison's Dun Skipper from the MSP 2018 Wildfire Ignition Reduction Plan 2021
Threat Name Threat Code
Altered fire regimeALTFIR
Code Obj. code Statement
EYPHAR-4 MON-DEV-MODL In 2017, develop habitat suitability models for Harbison's dun skipper, the host plant (San Diego sedge), and oak woodlands under current and future climate change scenarios, and conduct fire risk modeling with different management scenarios to identify potential fire and climate refugia. The results of this modeling will be considered in the development of monitoring and management plans.
regional POST 2017, 2018, 2019, 2020, 2021 SL
MON-IMP-FMGT EYPHAR-9

Management units: 3, 4, 5, 6, 8, 11

For at least the first 3 years following a wildfire, monitor recovery of Harbison's dun skipper occurrences and habitat affected by fire. Use a standardized postfire protocol to document the butterfly's distribution and abundance over time and to characterize habitat recovery and threats following a wildfire. Postfire monitoring should encompass occupied dun skipper sites and unoccupied sites that are important for enhancing connectivity or for future population expansion. The postfire monitoring should identify and prioritize management actions to assist in recovery of Harbison's dun skipper populations and important habitat patches.

Action Statement Action status Projects
IMP-1 Prepare and implement a postfire habitat monitoring protocol and sampling design to determine the status of Harbison's dun skipper occurrences and characterize oak woodland and host plant (San Diego sedge) recovery following wildfire. Use the monitoring results to identify management actions to ensure postfire recovery of high quality habitat as identified in the Harbison's Dun Skipper Management Plan. On hold
IMP-2 Submit project metadata, Harbison's dun skipper postfire survey and habitat monitoring data, annual reports with management recommendations, and a final report documenting project methods and results to the MSP Web Portal. On hold
Criteria Deadline year
At Least 3 Years of Postfire Monitoring of Harbison's Dun Skipper and Habitats with Annual Management Recommendations 2021
Threat Name Threat Code
Altered fire regimeALTFIR
Code Obj. code Statement
EYPHAR-1 MON-SURV-SPEC In 2017 and 2020, conduct host plant (San Diego sedge), adult, larval and hibernaculum surveys, and habitat assessments for Harbison's dun skipper that were initiated in 2013 in the MSPA (see Table of Occurrences) to further document the butterfly's current distribution and population size, define habitat requirements, and to assess habitat and threats at survey sites.
EYPHAR-2 MON-RES-GEN In 2017, in conjunction with adult surveys and the marking study for Harbison's dun skipper (see Table of Occurrences), capture adult butterflies and collect non-lethal genetic samples (i.e., legs) to analyze population genetic structure, dispersal and connectivity between populations, and genetic diversity. Use the analytical results to develop management recommendations to improve connectivity and to maintain or enhance genetic diversity at Harbison's dun skipper occurrences.
EYPHAR-3 MON-RES-SPEC In 2017, conduct a marking study of adult Harbison's dun skippers during the flight season to determine connectivity within habitat patches in a watershed. Design the study to obtain information on local movement patterns, flight season phenology, demography, detection probabilities, longevity, individual behavior, nectaring sources, and relationship between maximum counts and local population size. The results of this study should be used to develop specific management recommendations to be incorporated in the Harbison's Dun Skipper Management Plan.
EYPHAR-5 MGT-PRP-MGTPL In 2017, prepare a 5 year Harbison's Dun Skipper Management Plan that includes the results from butterfly surveys and habitat assessments, genetic and marking studies, and climate and fire modeling to characterize habitat quality at occupied occurrences and unoccupied suitable habitat important for enhancing connectivity, expanding populations or that could serve as fire and climate refugia. The plan should include an overall management strategy, identification and prioritization of sites where management is needed, and specific management recommendations for each site. It should also include actions to reduce fire risk at prioritized occurrences and specifications for monitoring the effectiveness of implementing high priority management actions.
regional POST 2017, 2018, 2019, 2020, 2021 SL
MGT-IMP-FMGT EYPHAR-10

Management units: 3, 4, 5, 6, 8, 11

For at least the first 3 years following a fire, implement management actions identified by postfire monitoring as necessary to protect and recover Harbison's dun skipper occurrences and habitat impacted by wildfire.

Action Statement Action status Projects
IMP-1 Implement management actions to restore oak woodland and host plant habitat destroyed by wildfire. These management actions may include planting oaks, host plants, and native nectaring plants. Control invasive plants to to =20% absolute cover to reduce postfire invasion of nonnative plants and to allow postfire recovery of native plants by reducing competition for water and light. Manage erosion and human use impacts while habitat is recoverying. On hold
IMP-2 Submit project metadata and management actions to the MSP Web Portal. On hold
Criteria Deadline year
At Least 3 Years of Postfire Management in Harbison's Dun Skipper Habitats 2021
Threat Name Threat Code
Altered fire regimeALTFIR
Invasive plantsINVPLA
Code Obj. code Statement
EYPHAR-2 MON-RES-GEN In 2017, in conjunction with adult surveys and the marking study for Harbison's dun skipper (see Table of Occurrences), capture adult butterflies and collect non-lethal genetic samples (i.e., legs) to analyze population genetic structure, dispersal and connectivity between populations, and genetic diversity. Use the analytical results to develop management recommendations to improve connectivity and to maintain or enhance genetic diversity at Harbison's dun skipper occurrences.
EYPHAR-3 MON-RES-SPEC In 2017, conduct a marking study of adult Harbison's dun skippers during the flight season to determine connectivity within habitat patches in a watershed. Design the study to obtain information on local movement patterns, flight season phenology, demography, detection probabilities, longevity, individual behavior, nectaring sources, and relationship between maximum counts and local population size. The results of this study should be used to develop specific management recommendations to be incorporated in the Harbison's Dun Skipper Management Plan.
EYPHAR-5 MGT-PRP-MGTPL In 2017, prepare a 5 year Harbison's Dun Skipper Management Plan that includes the results from butterfly surveys and habitat assessments, genetic and marking studies, and climate and fire modeling to characterize habitat quality at occupied occurrences and unoccupied suitable habitat important for enhancing connectivity, expanding populations or that could serve as fire and climate refugia. The plan should include an overall management strategy, identification and prioritization of sites where management is needed, and specific management recommendations for each site. It should also include actions to reduce fire risk at prioritized occurrences and specifications for monitoring the effectiveness of implementing high priority management actions.
EYPHAR-9 MON-IMP-FMGT For at least the first 3 years following a wildfire, monitor recovery of Harbison's dun skipper occurrences and habitat affected by fire. Use a standardized postfire protocol to document the butterfly's distribution and abundance over time and to characterize habitat recovery and threats following a wildfire. Postfire monitoring should encompass occupied dun skipper sites and unoccupied sites that are important for enhancing connectivity or for future population expansion. The postfire monitoring should identify and prioritize management actions to assist in recovery of Harbison's dun skipper populations and important habitat patches.