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Table 1. Federally Threatened and Endangered or Candidate Species considered for this project. Species Scientific Name Habitat Description and Habitat in Project Requirements Area? Canada Lynx Lynx canadensis Spruce/fir, mixed conifer, lodgepole Yes pine forest (primary), or mixed deciduous/conifer (secondary). Mexican spotted owl Strix occidentalis lucida Desert canyons, ponderosa forests. No Not known or expected to occur on the Paonia RD. Uncompahgre fritillary Boloria acrocnema Above treeline, closely associated No butterfly with larval host, snow willow. Not known or expected to occur on the Paonia RD. Debeque Phacelia Phacelia submutica Specific clay -based soils of the No (candidate) Wasatch Formation in Piceance Basin, CO. Not known or expected to occur on the Paonia RD Uinta Basin Hookless Sclerocactus glaucus Coarse rocky soils above the No Cactus current flood plains of the Colorado, Gunnison, and Green River drainages in western Colorado and northeastern Utah. Not known or expected to occur on the Paonia RD. V. Action Area The Forest Service vegetation database (R2Veg) data as of 04 Feb 2010 was used in this analysis to describe existing vegetation and habitats within the project area. Sudden Aspen Decline (SAD) is impacting mature aspen stands across the district, and declining stands have been identified in the immediate project area and across the analysis area. The current state of these stands is not reflected in R2Veg due to the rapid change in vegetation condition. It is anticipated that additional aspen stands will decline in 2010 and beyond, and that the affected aspen stands may constitute a much larger portion of the analysis area than they do currently. The analysis area for the Biological Assessment is the Mount Gunnison Lynx Analysis Unit, comprising 47,904 acres (Figure 1). Other scales of analysis may be used for other species (see the Biological Evaluation Sunset Lease Modification Biological Assessment 8