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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 Name Common Namesort icon Type Subtype Extent Risk of Introduction First Source
Aerodramus bartschi Mariana swiftlet vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Anolis ferreus Marie Gallant Sail-tailed anole vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Murdannia keisak marsh dew flower plant herbaceous not present moderate WA Weed List
Lepidosaphes maskelli Maskell scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Cenchrus longispinus mat sandbur plant grass widespread n/a (already in CA) CDFA
Nardus stricta matgrass plant grass not present moderate ID Weed List
Phyllophaga congrua May beetle arthropod beetle not present moderate CDFA (reg. A)
Maytenus boaria mayten plant woody limited n/a (already in CA) Med. plants list
Anthemis cotula mayweed chamomile plant herbaceous widespread n/a (already in CA) CO Weed List
Baculovirus PmSNPV Mbv-Type Virus of fish disease virus VALUE REQUIRED VALUE REQUIRED No list
Salvia pratensis meadow clary plant herbaceous not present moderate WA Weed List
Centaurea debeauxii meadow knapweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Trachysphaera fructigena Mealy Pod Diseases of Cushy Gall Disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ferrisia consobrina mealybug arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Hordeum marinum Mediterranean barley plant grass widespread n/a (already in CA) Cal-IPC list
Hordeum murinum Mediterranean barley plant grass widespread n/a (already in CA) Cal-IPC list
mytilus galloprovincialis Mediterranean blue mussel invertebrate aquatic mollusk, marine widespread n/a (already in CA) IMEAC
Ceratitis capitata Mediterranean fruit fly arthropod fly not present moderate CDFA (reg. A)
Hemidactylus turcicus Mediterranean gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Limnoria tripunctata Mediterranean gribble invertebrate crustaceans and tunicates limited n/a (already in CA) IMEAC
Limnoria quadripuncatata Mediterranean gribble invertebrate crustaceans and tunicates limited n/a (already in CA) IMEAC
Orthotomicus erosus Mediterranean pine engraver arthropod beetle not present high CDFA (reg. B)
Salvia aethiopis Mediterranean sage plant herbaceous limited n/a (already in CA) CDFA
Stipa capensis Mediterranean steppegrass plant grass limited n/a (already in CA) Cal-IPC list
Caulerpa taxifolia Mediterranean strain plant algae limited high OR Weed List
Schismus arabicus mediterraneangrass plant grass widespread n/a (already in CA) Cal-IPC list
Schismus barbatus mediterraneangrass plant grass widespread n/a (already in CA) Cal-IPC list
Taeniatherum caput-medusae medusahead plant grass widespread n/a (already in CA) CDFA
Megalometis chilensis Megalometis chilensis arthropod beetle not present moderate USDA Plant/Pest
Garrulax canorus Melodious laughing thrush vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Bactrocera cucurbitae melon fly arthropod fly not present low CDFA (reg. A)
Dacus cucurbitae Melon fruit fly arthropod fly not present low CDFA (reg. A)
Thrips palmi melon thrips arthropod thrips not present high CDFA (reg. A)
Diaphania hyalinata melonworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Paramyxovirus mv Menangle Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Prosopis velutina mesquite plant woody limited n/a (already in CA) USDA Plant/Pest
Prosopis alpataco mesquite plant woody not present low USDA Plant/Pest
Prosopis argentina mesquite plant woody not present low USDA Plant/Pest
Prosopis articulata mesquite plant woody not present low USDA Plant/Pest
Prosopis burkartii mesquite plant woody not present low USDA Plant/Pest
Prosopis caldenia mesquite plant woody not present low USDA Plant/Pest
Prosopis campestris mesquite plant woody not present low USDA Plant/Pest
Prosopis castellanosii mesquite plant woody not present low USDA Plant/Pest
Prosopis denudans mesquite plant woody not present low USDA Plant/Pest
Prosopis elata mesquite plant woody not present low USDA Plant/Pest
Prosopis farcta mesquite plant woody not present low USDA Plant/Pest
Prosopis ferox mesquite plant woody not present low USDA Plant/Pest
Prosopis fiebrigii mesquite plant woody not present low USDA Plant/Pest
Prosopis hassleri mesquite plant woody not present low USDA Plant/Pest
Prosopis humilis mesquite plant woody not present low USDA Plant/Pest
Prosopis kuntzei mesquite plant woody not present low USDA Plant/Pest
Prosopis pallida mesquite plant woody not present low USDA Plant/Pest
Prosopis palmeria mesquite plant woody not present low USDA Plant/Pest
Prosopis reptans mesquite plant woody not present low USDA Plant/Pest
Prosopis rojasiana mesquite plant woody not present low USDA Plant/Pest
Prosopis ruizlealii mesquite plant woody not present low USDA Plant/Pest
Prosopis ruscifolia mesquite plant woody not present low USDA Plant/Pest
Prosopis sericantha mesquite plant woody not present low USDA Plant/Pest
Prosopis torquata mesquite plant woody not present low USDA Plant/Pest
Epilachna varivestis Mexican bean beetle arthropod beetle not present high CDFA (reg. A)
Zabrotes subfasciatus Mexican bean weevil arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Diabrotica virgifera zea Mexican corn rootworm arthropod beetle not present moderate CDFA (reg. A)
Erigeron karvinskianus Mexican daisy plant herbaceous limited n/a (already in CA) Med. plants list
Washingtonia robusta Mexican fan palm plant woody limited n/a (already in CA) Cal-IPC list
Anastrepha ludens complex Mexican fruit fly complex arthropod fly not present moderate CDFA (reg. A)
Sciurus aureogaster Mexican red-bellied squirrel vertebrate mammal VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Ctenosaura pectinata Mexican spinytail iguana vertebrate reptile not present moderate Cal Code 14:671
Mikania cordata mile-a-minute plant herbaceous not present low USDA Plant/Pest
Milium vernale milium plant grass not present low ID Weed List
Howardia biclavis mining scale arthropod scale, aphid not present high CDFA (reg. A)
Hygrophila polysperma Miramar weed plant herbaceous not present high CDFA
Geminiviruses Misc. viral diseases of cotton, pepper, etc. disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pennisetum polystachion missiongrass plant grass not present low USDA Plant/Pest
Aratinga mitrata Mitered conure vertebrate bird VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Meriones unguiculatus Mongolian gerbil vertebrate mammal not present moderate CDFA Vert List
Myiopsitta monachus Monk parakeet vertebrate bird limited n/a (already in CA) Cal Code 14:671
Crocosmia x crocosmiiflora montbretia plant herbaceous limited n/a (already in CA) Cal-IPC list
Tarentola mauritanica Moorish gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Azolla pinnata mosquito fern plant herbaceous not present moderate USDA Plant/Pest
Bugula neritina Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Cryptosula pallasiana Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Watersipora subtorquata Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Tischeria marginata moth arthropod butterfly, moth not present low CDFA (reg. A)
Verbascum blattaria moth mullein plant herbaceous limited n/a (already in CA) CO Weed List
Lipinia noctua Moth skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Ovis ammon Mouflon sheep vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Mountain Ash Ringspot Mosaic Agent Mountain Ash Ringspot Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Mountain Ash Variegation Agent Mountain Ash Variegation Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Lepidodactylus lugubris Mourning gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Myosotella myosotis Mouse-ear marshsnail invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Hieracium pilosella mouseear hawkweed plant herbaceous not present moderate OR Weed List
Glossostigma diandrum mud mat plant herbaceous not present low WA Weed List
Phytoplasma md Mulberry Dwarf disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Mulberry Mosaic Agent Mulberry Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Aecidium mori Mulberry Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Harmonia axyridis Multicolored asian ladybeetle arthropod beetle not present high USDA pest
Gehyra mutilata Multilating gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Mastomys spp. Multimammate rat or mouse vertebrate mammal not present low Lacey Act
Bigeminvirus mymv Mung Bean Yellow Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ischaemum rugosum murainograss plant grass not present low USDA Plant/Pest