Status Report for the Mazama Pocket Gopher, Streaked Horned Lark, and Taylor’S Checkerspot
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STATE OF WASHINGTON November 2005 Status Report for the Mazama Pocket Gopher, Streaked Horned Lark, and Taylor’s Checkerspot by Derek W. Stinson Washington Department of FISH AND WILDLIFE Wildlife Program The Washington Department of Fish and Wildlife maintains a list of endangered, threatened and sensitive species (Washington Administrative Codes 232-12-014 and 232-12-011, Appendix D). In 1990, the Wash- ington Fish and Wildlife Commission adopted listing procedures developed by a group of citizens, interest groups, and state and federal agencies (Washington Administrative Code 232-12-297, Appendix D). The procedures include how species listing will be initiated, criteria for listing and delisting, public review and recovery and management of listed species. The first step in the process is to develop a preliminary species status report. The report includes a review of information relevant to the species’ status in Washington and addresses factors affecting its status including, but not limited to: historic, current, and future species population trends, natural history including ecologi- cal relationships, historic and current habitat trends, population demographics and their relationship to long term sustainability, and historic and current species management activities. The procedures then provide for a 90-day public review opportunity for interested parties to submit new scientific data relevant to the draft status report and classification recommendation. During the 90-day review period, the Department may hold public meetings to take comments and answer questions. At the close of the comment period, the Department completes the final status report and listing recommendation for presentation to the Washington Fish and Wildlife Commission. The final report and recommendations are then released 30 days prior to the Commission presentation for public review. The Draft Status Report for the Mazama pocket gopher, streaked horned lark and Taylor’s checkerspot but- terfly was reviewed by researchers and state, provincial, and federal agencies. This review was followed by a 90-day public comment period from 1 July – 30 September 2005. All comments received were considered in preparation of this final status report. Send written comments on this report by 1 December to: En- dangered Species Section Manager, Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington 98501-1091. The Department will present the results of this status review to the Fish and Wildlife Commission for action at the 13-14 January meeting in Olympia. This report should be cited as: Stinson, D. W. 2005. Washington State Status Report for the Mazama Pocket Gopher, Streaked Horned Lark, and Taylor’s Checkerspot. Washington Department of Fish and Wildlife, Olympia. 129+ xii pp. Cover photos by Chris Chappell (background), John Williams (lark), Bill Leonard (gopher), and Derek Stinson (checkerspot). Cover and title page illustrations by Darrell Pruett WASHINGTON STATE STATUS REPORT FOR THE MAZAMA POCKET GOPHER, STREAKED HORNED LARK, AND TAYLOR’S CHECKERSPOT Derek W. Stinson Washington Department of Fish and Wildlife Wildlife Program 600 Capitol Way N Olympia, Washington November 2005 TABLE OF CONTENTS ACKNOWLEDGEMENTS ..................................................................................................viii EXECUTIVE SUMMARY ..................................................................................................... ix Mazama Pocket Gopher .................................................................................................................ix Streaked Horned Lark .....................................................................................................................x Taylor’s Checkerspot .....................................................................................................................xi CHAPTER 1: INTRODUCTION TO WESTERN WASHINGTON GRASSLANDS ................. 1 South Puget Sound Prairies .............................................................................................................2 Present Status of South Puget Sound Prairies .................................................................................7 Prairie Habitat on Fort Lewis ........................................................................................................11 McChord Air Force Base .............................................................................................................14 Habitat Loss and Fragmentation ...................................................................................................14 Habitat Management and Restoration ...........................................................................................15 Research .......................................................................................................................................16 Miscellaneous Activities ...............................................................................................................17 CHAPTER 2. MAZAMA POCKET GOPHER ........................................................................... 18 INTRODUCTION ................................................................................................................. 18 TAXONOMY ...................................................................................................................................18 DESCRIPTION...................................................................................................................... 19 DISTRIBUTION .................................................................................................................... 21 North America ...............................................................................................................................21 Washington ...................................................................................................................................21 NATURAL HISTORY ........................................................................................................... 22 Diet and Foraging .........................................................................................................................22 Behavior, Burrowing and Burrows ...............................................................................................23 Reproduction .................................................................................................................................25 Home Range, Movements and Dispersal ......................................................................................26 Population Dynamics, Longevity, Survival and Mortality ...........................................................27 Ecological Relationships and Functions .......................................................................................28 HABITAT REQUIREMENTS ............................................................................................... 31 POPULATION STATUS........................................................................................................ 32 Washington: Past ..........................................................................................................................32 Washington: Present ......................................................................................................................35 HABITAT STATUS ............................................................................................................... 42 LEGAL STATUS ................................................................................................................... 44 MANAGEMENT ACTIVITIES ............................................................................................ 44 Surveys ..........................................................................................................................................44 Habitat Management and Restoration ..........................................................................................45 Research ........................................................................................................................................45 FACTORS AFFECTING CONTINUED EXISTENCE ........................................................ 45 Adequacy of Existing Regulatory Mechanisms ............................................................................45 Impacts of Habitat Loss, Fragmentation, and Degradation ..........................................................46 Airport Management and Development .......................................................................................47 Military Training ...........................................................................................................................47 Trapping and Poisoning ................................................................................................................48 November 2005 ii Washington Department of Fish and Wildlife CONCLUSIONS AND RECOMMENDATION ................................................................... 48 CHAPTER 3: STREAKED HORNED LARK ............................................................................ 49 INTRODUCTION ................................................................................................................. 49 Taxonomy .............................................................................................................................. 49 DESCRIPTION.....................................................................................................................