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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
Calotes versicolor Oriental garden lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Bactrocera dorsalis Oriental fruit fly arthropod fly not present moderate CDFA (reg. A)
Protaetia orientalis oriental flower beetle arthropod beetle not present moderate CDFA (reg. A)
Anomala orientalis Oriental beetle arthropod beetle not present moderate CDFA (reg. A)
Pseudococcus dendrobiorum Orchid mealybug arthropod scale, aphid not present high CDFA (reg. A)
Dactylis glomerata orchardgrass plant grass widespread n/a (already in CA) Cal-IPC list
Asterolecanium epidendri orchard scale arthropod scale, aphid not present high CDFA (reg. A)
Diadumene lineata Orange-stripped anemone invertebrate other limited n/a (already in CA) Exoticsguide
Phelsuma guimbeaui Orange-spotted day gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Estrilda melpoda Orange-cheeked waxbill vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Aleurocanthus spiniferus orange spiny whitefly arthropod scale, aphid not present high CDFA (reg. A)
Hieracium aurantiacum orange hawkweed plant herbaceous not present high WA Weed List
Cotoneaster franchetii orange cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Euplectes franciscanus Orange bishop vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Salsola soda oppositeleaf Russian thistle plant herbaceous limited n/a (already in CA) Cal-IPC list
Didelphis marsupialis Opossum vertebrate mammal widespread n/a (already in CA) DFG Code 2118
Asphodelus fistulosus onionweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Dyspessa ulula onion carpenter worm arthropod butterfly, moth not present moderate USDA Plant/Pest
Liothrips oleae olive thrips arthropod thrips not present moderate CDFA (reg. A)
Euphyllura olivina olive psyllid arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Bactrocera oleae Olive fruit fly arthropod fly widespread n/a (already in CA) pest of concern
Olea europaea olive plant woody limited n/a (already in CA) Cal-IPC list
Nerium oleander oleander plant woody limited n/a (already in CA) Med. plants list
Senecio vulgaris old-man-in-the-spring plant herbaceous widespread n/a (already in CA) Weeds of CA
Clematis vitalba old man's beard plant herbaceous limited n/a (already in CA) OR Weed List
Hylotrupes bajulus old house borer arthropod beetle not present high CDFA (reg. A)
Okra Yellow Leaf Curl Agent Okra Yellow Leaf Curl Agent disease virus VALUE REQUIRED VALUE REQUIRED No list
Tymovirus okmv Okra Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Okra Mosaic Agents Okra Mosaic Agents disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sphaerodactylus argus Ocellated gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Melanaspis obscura obscure scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Euphorbia oblongata oblong spurge plant herbaceous limited n/a (already in CA) CDFA
Fijivirus osdv Oat Sterile Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Oat Red Streak Mosaic Virus Oat Red Streak Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceratocystis fagacearum Oak wilt disease fungus not present moderate USDA Plant/Pest
Phytophthora quercina Oak disease disease oomycete VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Myocastor coypus Nutria vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Lonchura punctulata Nutneg manikin vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Spodoptera exempta nutgrass armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Hemimene juliana nut fruit tortrix arthropod butterfly, moth not present low USDA Plant/Pest
Rattus norvegicus Norway rat vertebrate mammal widespread n/a (already in CA) Cal Code 14:671
Channa argus Northern Snakehead vertebrate fish not present moderate Cal Code 14:671
Esox lucius Northern Pike vertebrate fish not present high Cal Code 14:671
Leiocephalus carinatus Northern curlytail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Diabrotica barberi northern corn rootworm arthropod beetle not present high CDFA (reg. A)
Cytorhabdovirus ncmv Northern Cereal Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Paramyxovirus nv Nipah Virus disease virus VALUE REQUIRED VALUE REQUIRED CDC
Dasypus novemcinctus Nine-banded armadillo vertebrate mammal not present high Cal Code 14:671
Muhlenbergia schreberi nimblewill plant grass limited n/a (already in CA) CDFA
Boselaphus tragocamelus Nilgai vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Varanus niloticus Nile monitor vertebrate reptile not present moderate Cal Code 14:671
Cornuvesica falcata New Zealand wood rot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Potamopyrgus antipodarum New Zealand mudsnail invertebrate aquatic mollusk, freshwater limited n/a (already in CA) CAISMP
Cnemidophorus neomexicanus New Mexico whiptail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Rhabdoscelus obscurus New Guinea sugarcane weevil arthropod beetle not present moderate USDA Plant/Pest
Pleistophora hyphessobryconis Neon-tetra disease of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Stigmina deflectans Needlecast Disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cercospora pini-densiflorae Needle blight disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytomyza ilicicola native holly leafminer arthropod fly limited n/a (already in CA) CDFA (reg. B)
Ceratitis rosa Natal fruit fly arthropod fly not present moderate CDFA (reg. A)
Senecio linearifolius narrowleaf ragwort plant herbaceous not present low CDFA
Conicosia pugioniformis narrowleaf iceplant plant herbaceous limited n/a (already in CA) Cal-IPC list
Sminthopsis spp. Narrow-footed marsupial mouse vertebrate mammal VALUE REQUIRED VALUE REQUIRED OR ISC Worst 100
Rhyacionia frustrana Nantucket pine tip moth arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Nandayus nenday Nanday conure vertebrate bird VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
n/a Indian citrus ringspot virus n/a Indian citrus ringspot virus disease virus not present VALUE REQUIRED CACASA
n/a Concave gum/blind pocket n/a Concave gum/blind pocket disease virus limited VALUE REQUIRED No list
n/a Citrus viroids n/a Citrus viroids disease virus not present VALUE REQUIRED No list
n/a Citrus vein-enation virus probably Luteovirus n/a Citrus vein-enation virus probably Luteovirus disease virus not present VALUE REQUIRED No list
Luteovirus n/a Citrus vein-enation virus probably Luteovirus disease virus limited VALUE REQUIRED No list
n/a Citrus psorosis virus n/a Citrus psorosis virus disease virus limited VALUE REQUIRED No list
n/a Citrus leaf blotch virus n/a Citrus leaf blotch virus disease virus not present VALUE REQUIRED No list
n/a Citrus chlorotic dwarf n/a Citrus chlorotic dwarf disease virus not present VALUE REQUIRED APHIS OPIS
Euphorbia myrsinites myrtle spurge plant herbaceous limited n/a (already in CA) CO Weed List
Myoporum laetum myoporum plant woody limited n/a (already in CA) Cal-IPC list
Cygnus olor Mute swan vertebrate bird widespread n/a (already in CA) Cal Code 14:671
Ovibos moshatus Musk-ox vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Carduus nutans musk thistle plant herbaceous limited n/a (already in CA) CDFA
Ischaemum rugosum murainograss plant grass not present low USDA Plant/Pest
Bigeminvirus mymv Mung Bean Yellow Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Mastomys spp. Multimammate rat or mouse vertebrate mammal not present low Lacey Act
Gehyra mutilata Multilating gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Harmonia axyridis Multicolored asian ladybeetle arthropod beetle not present high USDA pest
Aecidium mori Mulberry Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Mulberry Mosaic Agent Mulberry Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma md Mulberry Dwarf disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Glossostigma diandrum mud mat plant herbaceous not present low WA Weed List
Hieracium pilosella mouseear hawkweed plant herbaceous not present moderate OR Weed List
Myosotella myosotis Mouse-ear marshsnail invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Lepidodactylus lugubris Mourning gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Mountain Ash Variegation Agent Mountain Ash Variegation Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Mountain Ash Ringspot Mosaic Agent Mountain Ash Ringspot Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ovis ammon Mouflon sheep vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Lipinia noctua Moth skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Verbascum blattaria moth mullein plant herbaceous limited n/a (already in CA) CO Weed List
Tischeria marginata moth arthropod butterfly, moth not present low CDFA (reg. A)
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
Azolla pinnata mosquito fern plant herbaceous not present moderate USDA Plant/Pest