Endangered Species Protection Program (ESPP) raviventris Reithrodontomys raviventris Threatened species The U.S.Environmental The saltmarshharvestmouse Program (ESPP)willhelp Endangered SpeciesProtection Protection Agency’s(EPA) Endangered speciesare not jeopardizethesurvivalof numbers aresolowthatthey becoming extinct. plants andanimalsthatare may becomeendangeredinthe in immediatedangerof is anendangeredspecies ensure thatpesticideusedoes and animalswhosepopulation listed species. future. o source: B. Moose Pet B.Moose Photo source: areplants, . erson Office ofPesticide Programs (7507P) Endangered Spec Endangered name forthespecies,“red-belliedharvest mouse.” a cinnamon-coloredbelly, whichistheoriginofacommon halicoetes the twosubspecies,northern are itsears.Itmay alsohave adarkstripedownitsback.Of to brown,darker thanthatofthewesternharvest mouse,as which itresembles.Itssmall,2.75–3inch-longbodyisbuff have evolved fromthemorecommonwesternharvest mouse, Range Appearance Critical Habitat Status Description andEcology Habitat the onceextensive marshesofSanFrancisco, SanPablo and this mousetotake advantage ofitsuniquehabitat.However, insects) andwater, andtheabilitytoswimclimbenable tolerate highsalinityinbothfood(grasses, forbs,seeds,and vegetation, forescapeduringhightides. Theabilityto of pickleweedandareadjacent toupland,salt-tolerant species, inparticularthosethatsupportdensestands the SanFrancisco Bay NWR. southeastern shoreofSanFrancisco Bay. Thisincludes landin subspecies isfoundinthemarshesaroundsouthernand water marshremainingontheWest Coast.Thesouthern Agreement. SuisunMarshisthelargestcontiguousbrackish protected andmanagedundertheSuisunMarshPreservation the SanPablo Bay NationalWildlifeRefuge (NWR)andlands south ontheMarinPeninsula. Thisareaincludeslandsin Sacramento River, andstillothermarshes,includingsome around SuisunBay easttotheDeltaofSanJoaquinand and upthePetaluma River tothePetaluma Marsh,marshes northern subspeciesinhabitsmarshesaroundSanPablo Bay isolated fromeachother, largelyduetohumanactivities.The However, today themouse’s populationsaresmaller and still is,inthesaltmarshesofSanFrancisco Bay area. the central coastofCalifornia.Itwas concentrated, asit Salt MarshHarvestMouse Oncethesaltmarshharvest mouseranged along Endangered,listedOctober13,1970. hasawhitebelly. Salt marshesaretheoptimalhabitatforthis Thesaltmarshharvest mouseisthoughtto NotDesignated. The southern Reithrodontomys raviventris R. r.raviventris Reithrodontomys raviventris Reithrodontomys raviventris has http://www.epa.gov/espp/ U.S. EnvironmentalProtectionAgency completion ofrecovery tasks. dictated bynew converted environs. distance, butnotfromfragmented habitatacrossbareor Young saltmarshharvest micecandisperseaconsiderable , ,,andcats. salt marshharvest mousedoesnotburrow. Itisvulnerable to only alooseballofgrasses onthesurfaceofground.The litters ofonlyfouroffspringaretypical.Ifthereisanest,it females oftenbearonlyoneofthethreepossiblelitters,and to survive. Whilesexuallyactive fromMarchtoNovember, requires thatthepopulationrenewitselfevery year inorder salt marshharvest mouseisabout8to12months.This Approved recovery plansaresubject tomodi other thantheFWSinvolved intheplanformulation. of Recovery plansdonotnecessarily representtheviewsnor of recovery teams,contractors, stateagencies,andothers. preparesrecovery plans,sometimeswiththeassistance FWS FWS believes arerequiredtorecover orprotectlistedspecies. in 1984.Recovery plansoutline reasonableactionsthatthe developed arecovery planforthesaltmarshharvest mouse Recovery Plan Reproduction andLifeCycle habitat. diversions wouldcontributetothelossofmoresaltmarsh sediment depositionresultingfromupstreamdamsandwater refuge. Any riseinsealevel combinedwithareductionof retreat inwhichthesaltmarshharvest mousemighttake that aretotally remain. Someofthemarsheshave beenparedtoremnants acres oftidalmarshexistinginthe1850s,onlyabout30,100 Suisun Bays arenowextremelyfragmented. Ofthe193,800 ficial positionsorapprovals ofany individualsoragencies, ies flooded byhightides,leaving nohigh-ground findings, changesinspecies’status andthe TheU.S. FishandWildlifeService(FWS) Facts Thelifespanofthe fi cation as cation February 2010 Harves t Mouse

Salt Marsh Harvest Mouse Information Sources

Primary Reference Beacham, Walton, Castronova, Frank F., and Sessine, Suzanne (eds.) Beacham’s Guide to the Endangered Species of North America, Gale Group, New York. Vol. II, pp.1348-1350. wetlands, Don Edwards NWR. Listing Notice U.S. Fish and Wildlife Service, John and Karen Hollingsworth/USFWS Digital Library 1970. Federal Register 35, No. 199, pp. 16047-16048. http://ecos.fws.gov/docs/federal_register/fr27.pdf Recovery Plan U.S. Fish and Wildlife Service, 1984. Salt Marsh Harvest Mouse and Clapper Rail Re- covery Plan. U.S. Fish and Wildlife Service, Pacifi c Region, Portland, Oregon. 141 pp. http://ecos.fws.gov/docs/recovery_plan/841116.pdf Species Account U.S. Fish and Wildlife Service, Sacramento Fish and Wildlife Office, 2008. http://www.fws.gov/sacramento/es/animal_spp_acct/ salt_marsh_harvest_mouse.pdf

Pickleweed courtes y of Steve Matson

Salt masrsh harvest mouse release/California Department of Water Res ources