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<br />t!? <br />c::l <br />c') <br /> <br />(-., <br /> <br />~~ <br />ti\ <br /> <br />13 <br /> <br />least eight and possibly nine species: cutthroat trout (Oncorhvnchus clarki ssp.), roundtail <br />chub, Colorado squawfish, speckled dace (Rhinichthvs osculus), f1annelmouth sucker <br />(Catostomus latioinnis), bluehead sucker (C,. discobolus), razorback sucker, and mottled <br />sculpin (Cottus bairdi). Based on two specimens and skeletal remains in Native American <br />middens, bony tail chub (Gila eleaans) may also have inhabited the river. Twenty-three non- <br />native fish species have been reported in the San Juan River. In warmwater reaches of the <br />mainstem San Juan River, common carp (Cvorinus caroio) and channel catfish (Ictalurus <br />ounctatus) are common and generally distributed. Rainbow trout (Oncorhvnchus mvkiss). <br />cutthroat trout (0. clarki), and brown trout (Salmo trutta) are common non-natives in the <br />coldwater reaches of the San Juan River (including the blue ribbon trout fishery in the Navajo <br />Dam tailwater reach and supported by cold water releases from the reservoir) and its upper <br />tributaries. Red shiner (Cvorinella lutrensis), fathead minnow (Pimeohales oromelas), and <br />mosquitofish (Gambusia affinis) are the most common non-native species found in low- <br />velocity habitats associated with the mainstem San Juan River. <br /> <br />Terrestrial Resources <br /> <br />The variety in topography and diversity of vegetative communities within the San Juan Basin <br />provide habitats for a broad assemblage of terrestrial species. These include Rocky Mountain <br />elk (Cervus elaohus) and mule deer (Odocoileus hemionus) as primary big game mammals in <br />certain portions of the basin and such predators and furbearers as coyote (Canis latrans), gray <br />fox (Urocvon cinereoaraenteus), kit fox (Vuloes macrotis), mountain lion (Felis concolor), <br />bobcat (Ivnx rufus). striped skunk (Meohitis meohitis), western spotted skunk (Soiloaale <br />aracilis) badger (Taxidea taxus), and raccoon (Procvon lotor). <br /> <br />A wide variety of both migratory and resident bird species are known from the San Juan <br />Basin. These include raptors such as the bald eagle (Haliaeetus lucoceohalus), peregrine <br />falcon (Falco perearinus). golden eagle (Aauila chrvsaetos), ferruginous hawk (Buteo reaalis). <br />red-tailed hawk (J:l.. iamaicensis), and osprey (Pandion haliaetus). Species of shorebirds <br />documented in the San Juan River Valley include the great blue heron (Ardea herodias), black- <br />crowned night heron (Nvcticorax nvcticorax), killdeer (Charadrius vociferus), and black-necked <br />stilt (Himantoous mexicanus). The San Juan River provides wintering and nesting habitat for <br />migratory waterfowl. Most noticeable of these are the Canada geese (I3ranta canadensis) <br />utilizing the croplands adjacent to the San Juan River in the vicinitY of Farmington. <br />Concentrations of this species in the river valley fluctuate depending upon food availability and <br />weather conditions. <br /> <br />For a more detailed listing of the basin's avifauna, the reader is referred to Hubbard (1978). <br /> <br />Threatened Or Endanaered Soecies <br /> <br />In addition to the Colorado squawfish, which is the subject of this proposal, species of both <br />plants and animals that have been federally listed under the Endangered Species Act may <br />occur within the general area of this analysis. These include the threatened Mesa Verde <br />cactus (Sclerocactus mesae-verdae) and bald eagle; and the endangered mancos Milkvetch <br />(Astraaalus humillimus), southwestern willow flycatcher (Emoidonax trailii extimus). peregrine <br />falcon, and razorback sucker. <br />