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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
Coccus viridis Green scale arthropod scale, aphid not present high CDFA (reg. A)
Cochliobolus miyabeanus Brown Spot of Rice disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cochliomyia hominivorax screwworm arthropod fly not present low CDFA (reg. A)
Cocoa Swollen Shoot Virus Cocoa Swollen Shoot Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Coelioxys spp. cuckoo bees arthropod bee, wasp not present low USDA Plant/Pest
Colletotrichum coffeanum Brown Blight disease fungus not present low USDA Plant/Pest
Columba livia Feral pigeon vertebrate bird widespread high Witmer et al
Commelina benghalensis Benghal dayflower plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Comovirus of unknown genus Andean Potato Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Comovirus rcmv Red Clover Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Conicosia pugioniformis narrowleaf iceplant plant herbaceous limited n/a (already in CA) Cal-IPC list
Coniothyrium spp. canker in elm disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Conium maculatum poison-hemlock plant herbaceous widespread n/a (already in CA) Cal-IPC list
Conoderus rufangulus Conoderus rufangulus arthropod beetle not present high USDA Plant/Pest
Conogethes punctiferalis yellow peach moth arthropod butterfly, moth not present moderate USDA Plant/Pest
Conopomorpha cramerella cocoa pod borer arthropod butterfly, moth not present low USDA Plant/Pest
Conopomorpha litchiella lychee leaf miner arthropod butterfly, moth not present low CDFA (reg. A)
Conotrachelus aguacatae small avocado seed weevil arthropod beetle not present high USDA Plant/Pest
Conotrachelus juglandis butternut curculio arthropod beetle not present moderate CDFA (reg. A)
Conotrachelus nenuphar plum curculio arthropod beetle not present high CDFA (reg. A)
Conotrachelus perseae small seed weevil arthropod beetle not present high CDFA (reg. A)
Conotrachelus retentus black walnut curculio arthropod beetle not present moderate CDFA (reg. A)
Conotrachelus spp. hidden snout weevils arthropod beetle not present moderate USDA Plant/Pest
Contarinia johnsoni grape blossum midge arthropod fly not present low CDFA (reg. A)
Convolvulus arvensis field bindweed plant herbaceous widespread n/a (already in CA) CDFA
Conyza bonariensis asthmaweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Copsychus malabaricus White-rumped shama vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Copturus aguacatae avocado stem weevil arthropod beetle not present high USDA Plant/Pest
Corbicula fluminalis Corbicula fluminalis invertebrate aquatic mollusk, freshwater limited n/a (already in CA) ANSTF
Corbicula fluminea Asian clam invertebrate aquatic mollusk, freshwater widespread n/a (already in CA) ANSTF
Corbula amurensis Overbite clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Corcyra cephalonica rice moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Cordyceps spp. Fungal Disease of Bees disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cordyline australis giant dracaena plant herbaceous limited n/a (already in CA) Cal-IPC list
Cornuvesica falcata New Zealand wood rot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Coronopus squamatus swinecress plant herbaceous limited n/a (already in CA) CDFA
Cortaderia jubata jubatagrass plant grass widespread n/a (already in CA) Cal-IPC list
Cortaderia selloana pampasgrass plant grass widespread n/a (already in CA) Cal-IPC list
Cotoneaster franchetii orange cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotoneaster lacteus Parney's cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotoneaster pannosus silverleaf cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotula coronopifolia brassbuttons plant herbaceous widespread n/a (already in CA) Cal-IPC list
Coturnix coturnix Common quail vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Crassula helmsii Australian swamp stonecrop plant herbaceous not present low WA Weed List
Crataegus monogyna hawthorn plant woody limited n/a (already in CA) Cal-IPC list
Cricetomys gambianus Gambian giant pouched rat vertebrate mammal not present low Cal Code 14:671
Crinipellis perniciosa Witches Broom Fungus in cocoa disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Crinivirus CYSDV Cucurbit Yellow Stunting Disorder Virus disease virus limited moderate EPPO
Crinivirus pyvv Potato Yellow Vein Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Crinivirus spcsv Sweetpotato Chlorotic Stunt Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Crisicoccus azaleae azalea mealybug arthropod scale, aphid not present moderate CDFA (reg. B)
Crocosmia x crocosmiiflora montbretia plant herbaceous limited n/a (already in CA) Cal-IPC list
Cronartium flaccidum Scotch Pine Blister Rust disease fungus not present low USDA Plant/Pest
Cronartium ribicola White pine blister rust disease fungus limited n/a (already in CA) ForestPests.org
Crupina vulgaris common crupina plant herbaceous limited n/a (already in CA) CDFA
Cryphonectria parasitica Chestnut blight disease fungus not present high ISSG Global InvS
Cryptoblepharus poecilopleurus Pacific snake-eyed skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Cryptocotyle lingua Black Spot parasite of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Cryptophlebia leucotreta false codling moth arthropod butterfly, moth not present high CDFA (reg. A)
Cryptorhynchus mangiferae mango seed weevil arthropod beetle not present low USDA Plant/Pest
Cryptosula pallasiana Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Ctenosaura pectinata Mexican spinytail iguana vertebrate reptile not present moderate Cal Code 14:671
Ctenosaura similis Black spinytail iguana vertebrate reptile not present high Cal Code 14:671
Cucumis melo var. duriam dudaim melon plant herbaceous limited n/a (already in CA) CDFA
Cucumis myriocarpus paddy melon plant herbaceous limited n/a (already in CA) CDFA
Cuon alpinus Indian wild dog / Dhole vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Curculio caryae pecan weevil arthropod beetle not present moderate CDFA (reg. A)
Curculio elephas chestnut weevil arthropod beetle not present high USDA Plant/Pest
Curculio nucum hazelnut weevil arthropod beetle not present high USDA Plant/Pest
Curtovirus CTVCP Curly top virus disease virus widespread n/a (already in CA) CDFA (reg. A)
Cuscuta approximata smoothseed alfalfa dodder plant herbaceous limited n/a (already in CA) WA Weed List
Cuscuta australis Australian dodder plant herbaceous not present low CDFA
Cuscuta japonica Japanese dodder plant herbaceous limited n/a (already in CA) CDFA
Cuscuta monogyna Eastern Dodder plant herbaceous not present low No list
Cuscuta reflexa giant dodder plant herbaceous not present low CDFA
Cuscuta spp. (C. japonica, reflexa, australia, monogyna) Dodder (non-native spp.) plant herbaceous limited n/a (already in CA) CDFA
Cyclaneusma minus Cyclaneusma Needle Cast disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Cydia caryana hickory shuckworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Cydia funebrana red plum maggot arthropod butterfly, moth not present high USDA Plant/Pest
Cydia splendana chestnut moth arthropod butterfly, moth not present high CDFA (reg. A)
Cygnus olor Mute swan vertebrate bird widespread n/a (already in CA) Cal Code 14:671
Cylas formicarius elegantulus sweetpotato weevil arthropod beetle not present high CDFA (reg. A)
Cylas spp. exotic weevil arthropod beetle not present moderate CDFA (reg. A)
Cynara cardunculus artichoke thistle plant herbaceous widespread n/a (already in CA) CDFA
Cynodon dactylon bermudagrass plant grass widespread n/a (already in CA) CDFA
Cynoglossum officinale houndstongue plant herbaceous limited n/a (already in CA) Cal-IPC list
Cynomys ludovicianus Prairie dog vertebrate mammal not present low CDFA Vert List
Cynosurus echinatus hedgehog dogtailgrass plant grass widespread n/a (already in CA) Cal-IPC list
Cyperus difformis variable flatsedge plant herbaceous limited n/a (already in CA) Weeds of CA
Cyperus rotundus purple nutsedge plant herbaceous widespread n/a (already in CA) CDFA
Cyrtopodion scabrum Rough-tailed gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Cytisus scoparius Scotch broom plant woody widespread n/a (already in CA) CDFA
Cytisus striatus Portuguese broom plant woody limited n/a (already in CA) Cal-IPC list
Cytorhabdovirus bysmv Barley Yellow Striate Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cytorhabdovirus ncmv Northern Cereal Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Dactylis glomerata orchardgrass plant grass widespread n/a (already in CA) Cal-IPC list
Dacus bivittatus African pumpkin fly arthropod fly not present moderate CDFA (reg. A)
Dacus cucurbitae Melon fruit fly arthropod fly not present low CDFA (reg. A)
Dacus sp. exotic fruit fly arthropod fly not present moderate CDFA (reg. A)
Danothrips trifasciatus thrips arthropod thrips not present high CDFA (reg. B)