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05/21/98 16: 17 $9169792770 FISH & WILDLIFE U005
<br /> Enclosure B
<br /> Mitigation Guidelines for the
<br /> Valley Elderberry Longhorn Beetle
<br /> 19 September 1996
<br /> The following guidelines have been issued by the U.S.Fish and Wildlife Service(Service)to assist
<br /> project applicants and others in developing measures to avoid and,if complete avoidance is not possible,
<br /> to mitigate for adverse effects on the valley elderberry longhorn beetle. The Service will revise these
<br /> guidelines as needed in the future. The most recently issued version of these guidelines should be used in
<br /> developing all projects and mitigation plans. The survey and monitoring procedures described below are
<br /> designed to avoid any adverse effects to the valley elderberry longhorn beetle. Thus a recovery permit is
<br /> not needed to survey for the beetle or its habitat or to monitor mitigation sites. If you are interested in a
<br /> recovery permit for research purposes please call the Service's Regional Office at(503)231-2063.
<br /> Background Information
<br /> valley elderberry longhorn beetle,Desmocerus californicus dimorphus,was listed as a threatened
<br /> The
<br /> species August 8, 1980 (Federal Register 45:52803-52807). This animal is fully protected under the
<br /> Endangered Species Act of 1973,as amended.(16 U.S.C. 1531 et seq.). The valley elderberry longhorn
<br /> beetle(beetle)is completely dependent on its host plant,elderberry(Sambucus species),which is a
<br /> common component of the remaining riparian forests and adjacent upland habitats of California's Central
<br /> Valley. Use of the plants by the animal,a wood borer,is rarely apparent. Frequently,the only exterior
<br /> evidence of the plant's use by the beetle is an exit hole created by the larva just prior to the pupal stage.
<br /> The life cycle most likely takes two years to complete. The animal spends most of its life in the Laval
<br /> stage,living within the stems of an elderberry plant. Adult emergence is from April through June, about
<br /> the same time the elderberry produces flowers. The adult stage is short-lived. Further information on the
<br /> life history,ecology,behavior,and distribution of the beetle can be found in a report by Barr(199 1) and
<br /> the rccovery'plan for the beetle(USFWS 1984)..
<br /> Surveys
<br /> Proposed project sites within the range of the valley elderberry longhorn beetle should be surveyed for the
<br /> presence of the beetle and its elderberry host plant by a qualified biologist. The beetle's range extends
<br /> throughout California's Central Valley and associated foothills from about the 3,000-foot elevation
<br /> contour on the east and the watershed of the Central Valley on the west(Figure 1). All or portions of 31
<br /> counties aro included: Alameda,Amador,Butte,Calaveras,Colusa,Contra Costa,El Dorado,Fresno,
<br /> Glenn,Kern,Kings,Lake,Madera,Mariposa,Merced,Napa,Nevada,Placer,Sacramento, San Benito,
<br /> San Joaquin, San Luis Obispo,Shasta,Solano, Stanislaus,Sutter,Tehama,Tulare,Tuolumne,Yolo,
<br /> Yuba.
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