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CISAC has compiled the list below of over 1,700 species known to be invasive in California or a potential threat for introduction to the state. Please use the comment form below to let us know about: taxa that should be added or removed; species information that you would change; and species that you think should be a high priority for having a scorecard completed (choose Review Scorecards to see the list of scorecards already drafted). Make sure to click Save. Previous comments are displayed at the bottom of the page.

Download Species List (.csv) (to open in a Spreadsheet program)
This data download is provided to aid in the review of the draft invasive species list. We discourage other use of this data until it has been revised and finalized.

Scientific Namesort icon Common Name Type Subtype Extent Risk of Introduction First Source
Cilivirus cilv-c Citrus leprosis virus C disease virus not present high Acarology Journa
Cichorium intybus chicory plant herbaceous widespread n/a (already in CA) CO Weed List
Cichlasoma spilurum Blue-eyed cichlid vertebrate fish not present high Cal Code 14:671
Cichlasoma salvini Yellowbelly cichlid vertebrate fish not present low Cal Code 14:671
Chrysopogon aciculatus pilipiliula plant grass not present low USDA Plant/Pest
Chrysophtharta m-fuscum paropsine leaf beetle arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Chrysomyxa ledi var. rhododendri Rhododendron-spruce Needle Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Chrysomyxa himalensis Spruce Needle Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Chrysomyxa abietis Spruce Needle Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Chrysolina bankii leaf beetle arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Chrysodeixis eriosoma green garden looper arthropod butterfly, moth not present low CDFA (reg. A)
Chrysodeixis chalcites golden twin spot moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Chrysis spp. cuckoo wasps arthropod bee, wasp not present moderate USDA Plant/Pest
Chrysemys picta Painted turtle vertebrate reptile VALUE REQUIRED n/a (already in CA) DFG Code 2118
Chrysanthemum coronarium crown daisy plant herbaceous limited n/a (already in CA) Cal-IPC list
Choristoneura fumiferana spruce budworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Chorispora tenella blue mustard plant herbaceous limited n/a (already in CA) CDFA
Chondrilla juncea rush skeletonweed plant herbaceous limited n/a (already in CA) CDFA
Chionaspis furfura scurfy scale arthropod scale, aphid not present high CDFA (reg. A)
Chionaspis americana elm scurfy scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Chilo suppressalis Asiatic rice borer arthropod butterfly, moth not present high CDFA (reg. A)
Chilo plejadellus rice stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Chelymorpha cassidea argus tortoise beetle arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Chelydra serpentine Snapping turtle vertebrate reptile not present moderate Cal Code 14:671
Channa argus Northern Snakehead vertebrate fish not present moderate Cal Code 14:671
Chamaeleo jacksonii Jackson’s chameleon vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Chamaeleo calyptratus Veiled chameleon vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Chalcodermus aeneus cowpea curculio arthropod beetle not present high CDFA (reg. A)
Chalara australis Vascular stain fungus disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Chaenorhinum minus dwarf snapdragon plant herbaceous not present moderate WA Weed List
Cettia diphone Japanese bush warbler vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Cervus unicolor Sambar deer vertebrate mammal VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Cervus Nippon Sika deer vertebrate mammal VALUE REQUIRED VALUE REQUIRED Harmful U.S. NIS
Cervus elaphus Wapiti vertebrate mammal VALUE REQUIRED n/a (already in CA) ISSG 100WorstIAS
Cervus duvauceli Swamp deer vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Cervus dama Fallow deer vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Cervus axis Axis deer vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Cerotoma trifurcata bean leaf beetle arthropod beetle not present high CDFA (reg. A)
Ceroplastes rusci fig wax scale arthropod scale, aphid not present high CDFA (reg. A)
Ceroplastes rubens red wax scale arthropod scale, aphid not present high CDFA (reg. A)
Ceroplastes floridensis Florida wax scale arthropod scale, aphid not present high CDFA (reg. A)
Ceroplastes ceriferus Indian wax scale arthropod scale, aphid not present high CDFA (reg. A)
Cerodontha iridophora leafminer fly arthropod fly not present moderate CDFA (reg. A)
Cercospora pini-densiflorae Needle blight disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cercopithecus aethiops Vervet monkey vertebrate mammal VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Ceratocystis tenella Blue Stain disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceratocystis novae-zelandiae wood-staining disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceratocystis nothogafi Blue Stain Fungus disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceratocystis moniliformis Cocoa ceratocystis wilt disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ceratocystis fimbriata black rot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceratocystis fagacearum Oak wilt disease fungus not present moderate USDA Plant/Pest
Ceratocystis (Ophiostoma) ulmi Dutch elm disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceratitis spp. Ceratitis spp. arthropod fly limited high USDA Plant/Pest
Ceratitis rosa Natal fruit fly arthropod fly not present moderate CDFA (reg. A)
Ceratitis capitata Mediterranean fruit fly arthropod fly not present moderate CDFA (reg. A)
Centaurea virgata ssp. Squarrosa squarrose knapweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Centaurea sulphurea Sicilian thistle plant herbaceous limited n/a (already in CA) CDFA
Centaurea stoebe ssp. micranthos spotted knapweed plant herbaceous limited n/a (already in CA) AZ Weed List
Centaurea solstitialis yellow starthistle plant herbaceous widespread n/a (already in CA) CDFA
Centaurea nigra black knapweed plant herbaceous limited n/a (already in CA) WA Weed List
Centaurea melitensis Malta starthistle plant herbaceous widespread n/a (already in CA) CDFA
Centaurea macrocephala bighead knapweed plant herbaceous not present moderate WA Weed List
Centaurea jacea brown knapweed plant herbaceous limited n/a (already in CA) WA Weed List
Centaurea iberica Iberian starthistle plant herbaceous limited n/a (already in CA) CDFA
Centaurea diffusa diffuse knapweed plant herbaceous limited n/a (already in CA) CDFA
Centaurea debeauxii meadow knapweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Centaurea calcitrapa purple starthistle plant herbaceous widespread n/a (already in CA) CDFA
Cenchrus longispinus mat sandbur plant grass widespread n/a (already in CA) CDFA
Cenchrus incertus coast sandbur plant grass widespread n/a (already in CA) CDFA
Cenchrus echinatus southern sandbur plant grass widespread n/a (already in CA) CDFA
Celama sorghiella sorghum webworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Caulerpa taxifolia Mediterranean strain plant algae limited high OR Weed List
Caulerpa racemosa Caulerpa racemosa plant algae VALUE REQUIRED high Hoffman NOAA
Caulerpa brachypus Caulerpa brachypus plant algae unknown high Hoffman NOAA
Caulacanthus ustulatus red algae plant algae unknown VALUE REQUIRED Hoffman NOAA
Cathartus quadricollis squarenecked grain beetle arthropod beetle not present high CDFA (reg. A)
Cataenococcus olivaceus yucca mealybug arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Castor canadensis Beaver vertebrate mammal widespread n/a (already in CA) Cal Code 14:671
Carum carvi wild caraway plant herbaceous not present high CO Weed List
Carthamus oxyacantha wild safflower plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Carthamus leucocaulos whitestem distaff thistle plant herbaceous not present moderate CDFA
Carthamus lanatus woolly distaff thistle plant herbaceous widespread n/a (already in CA) CDFA
Carthamus baeticus smooth distaff thistle plant herbaceous limited n/a (already in CA) CDFA
Carposina niponensis peach fruit moth arthropod butterfly, moth not present low USDA Plant/Pest
Carpobrotus edulis iceplant plant herbaceous widespread n/a (already in CA) Cal-IPC list
Carlavirus pvm Potato Mop Top Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Carlavirus cpmmv Cowpea Mild Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Carlavirus casmmv Cassava Common Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Carlavirus Blueberry Scorch carlavirus disease virus not present moderate EPPO
Carduus tenuiflorus slenderflower thistle plant herbaceous widespread n/a (already in CA) CDFA
Carduus pycnocephalus Italian thistle plant herbaceous widespread n/a (already in CA) CDFA
Carduus nutans musk thistle plant herbaceous limited n/a (already in CA) CDFA
Carduus acanthoides plumeless thistle plant herbaceous limited n/a (already in CA) CDFA
Cardinalis cardinalis Common cardinal vertebrate bird VALUE REQUIRED n/a (already in CA) DFG Code 2118
Cardaria pubescens hairy whitetop plant herbaceous limited n/a (already in CA) CDFA
Cardaria draba hoary cress plant herbaceous widespread n/a (already in CA) CDFA
Cardaria chalepensis lens-podded white-top plant herbaceous limited n/a (already in CA) CDFA
Carcinus maenas Green crab invertebrate crustaceans and tunicates limited n/a (already in CA) NISIC
Carausius morosus Indian walking stick arthropod stick insect limited n/a (already in CA) CDFA (reg. B)
Capua tortrix Capua tortrix arthropod butterfly, moth not present low USDA Plant/Pest