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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
Carduus nutans musk thistle plant herbaceous limited n/a (already in CA) CDFA
Ovibos moshatus Musk-ox vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Cygnus olor Mute swan vertebrate bird widespread n/a (already in CA) Cal Code 14:671
Myoporum laetum myoporum plant woody limited n/a (already in CA) Cal-IPC list
Euphorbia myrsinites myrtle spurge plant herbaceous limited n/a (already in CA) CO Weed List
n/a Citrus chlorotic dwarf n/a Citrus chlorotic dwarf disease virus not present VALUE REQUIRED APHIS OPIS
n/a Citrus leaf blotch virus n/a Citrus leaf blotch virus disease virus not present VALUE REQUIRED No list
n/a Citrus psorosis virus n/a Citrus psorosis virus disease virus limited 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 viroids n/a Citrus viroids disease virus not present VALUE REQUIRED No list
n/a Concave gum/blind pocket n/a Concave gum/blind pocket disease virus limited VALUE REQUIRED No list
n/a Indian citrus ringspot virus n/a Indian citrus ringspot virus disease virus not present VALUE REQUIRED CACASA
Nandayus nenday Nanday conure vertebrate bird VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Rhyacionia frustrana Nantucket pine tip moth arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Sminthopsis spp. Narrow-footed marsupial mouse vertebrate mammal VALUE REQUIRED VALUE REQUIRED OR ISC Worst 100
Conicosia pugioniformis narrowleaf iceplant plant herbaceous limited n/a (already in CA) Cal-IPC list
Senecio linearifolius narrowleaf ragwort plant herbaceous not present low CDFA
Ceratitis rosa Natal fruit fly arthropod fly not present moderate CDFA (reg. A)
Phytomyza ilicicola native holly leafminer arthropod fly limited n/a (already in CA) CDFA (reg. B)
Cercospora pini-densiflorae Needle blight disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Stigmina deflectans Needlecast Disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pleistophora hyphessobryconis Neon-tetra disease of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Rhabdoscelus obscurus New Guinea sugarcane weevil arthropod beetle not present moderate USDA Plant/Pest
Cnemidophorus neomexicanus New Mexico whiptail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Potamopyrgus antipodarum New Zealand mudsnail invertebrate aquatic mollusk, freshwater limited n/a (already in CA) CAISMP
Cornuvesica falcata New Zealand wood rot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Varanus niloticus Nile monitor vertebrate reptile not present moderate Cal Code 14:671
Boselaphus tragocamelus Nilgai vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Muhlenbergia schreberi nimblewill plant grass limited n/a (already in CA) CDFA
Dasypus novemcinctus Nine-banded armadillo vertebrate mammal not present high Cal Code 14:671
Paramyxovirus nv Nipah Virus disease virus VALUE REQUIRED VALUE REQUIRED CDC
Cytorhabdovirus ncmv Northern Cereal Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Diabrotica barberi northern corn rootworm arthropod beetle not present high CDFA (reg. A)
Leiocephalus carinatus Northern curlytail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Esox lucius Northern Pike vertebrate fish not present high Cal Code 14:671
Channa argus Northern Snakehead vertebrate fish not present moderate Cal Code 14:671
Rattus norvegicus Norway rat vertebrate mammal widespread n/a (already in CA) Cal Code 14:671
Hemimene juliana nut fruit tortrix arthropod butterfly, moth not present low USDA Plant/Pest
Spodoptera exempta nutgrass armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Lonchura punctulata Nutneg manikin vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Myocastor coypus Nutria vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Phytophthora quercina Oak disease disease oomycete VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceratocystis fagacearum Oak wilt disease fungus not present moderate USDA Plant/Pest
Oat Red Streak Mosaic Virus Oat Red Streak Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Fijivirus osdv Oat Sterile Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Euphorbia oblongata oblong spurge plant herbaceous limited n/a (already in CA) CDFA
Melanaspis obscura obscure scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Sphaerodactylus argus Ocellated gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Okra Mosaic Agents Okra Mosaic Agents disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Tymovirus okmv Okra Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Okra Yellow Leaf Curl Agent Okra Yellow Leaf Curl Agent disease virus VALUE REQUIRED VALUE REQUIRED No list
Hylotrupes bajulus old house borer arthropod beetle not present high CDFA (reg. A)
Clematis vitalba old man's beard plant herbaceous limited n/a (already in CA) OR Weed List
Senecio vulgaris old-man-in-the-spring plant herbaceous widespread n/a (already in CA) Weeds of CA
Nerium oleander oleander plant woody limited n/a (already in CA) Med. plants list
Olea europaea olive plant woody limited n/a (already in CA) Cal-IPC list
Bactrocera oleae Olive fruit fly arthropod fly widespread n/a (already in CA) pest of concern
Euphyllura olivina olive psyllid arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Liothrips oleae olive thrips arthropod thrips not present moderate CDFA (reg. A)
Dyspessa ulula onion carpenter worm arthropod butterfly, moth not present moderate USDA Plant/Pest
Asphodelus fistulosus onionweed 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
Salsola soda oppositeleaf Russian thistle plant herbaceous limited n/a (already in CA) Cal-IPC list
Euplectes franciscanus Orange bishop vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Cotoneaster franchetii orange cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Hieracium aurantiacum orange hawkweed plant herbaceous not present high WA Weed List
Aleurocanthus spiniferus orange spiny whitefly arthropod scale, aphid not present high CDFA (reg. A)
Estrilda melpoda Orange-cheeked waxbill vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Phelsuma guimbeaui Orange-spotted day gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Diadumene lineata Orange-stripped anemone invertebrate other limited n/a (already in CA) Exoticsguide
Asterolecanium epidendri orchard scale arthropod scale, aphid not present high CDFA (reg. A)
Dactylis glomerata orchardgrass plant grass widespread n/a (already in CA) Cal-IPC list
Pseudococcus dendrobiorum Orchid mealybug arthropod scale, aphid not present high CDFA (reg. A)
Anomala orientalis Oriental beetle arthropod beetle not present moderate CDFA (reg. A)
Protaetia orientalis oriental flower beetle arthropod beetle not present moderate CDFA (reg. A)
Bactrocera dorsalis Oriental fruit fly arthropod fly not present moderate CDFA (reg. A)
Calotes versicolor Oriental garden lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Aonidiella orientalis oriental scale arthropod scale, aphid not present high CDFA (reg. A)
Horidiplosis ficifolii Ornamental fig pest arthropod fly not present low Univ. Florida
Polygonum arenastrum oval leaf knotweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Aegilops ovata ovate goatgrass plant grass limited n/a (already in CA) CDFA
Corbula amurensis Overbite clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Leucanthemum vulgare ox-eye daisy plant herbaceous widespread n/a (already in CA) Cal-IPC list
Senecio squalidus Oxford ragwort plant herbaceous not present low CDFA
Lagarosiphon major oxygenweed plant herbaceous not present moderate CDFA
Agrostis avenacea Pacific bentgrass plant grass limited n/a (already in CA) Cal-IPC list
Cryptoblepharus poecilopleurus Pacific snake-eyed skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Cucumis myriocarpus paddy melon plant herbaceous limited n/a (already in CA) CDFA
Chrysemys picta Painted turtle vertebrate reptile VALUE REQUIRED n/a (already in CA) DFG Code 2118
Acaena pallida pale biddy-biddy plant herbaceous limited n/a (already in CA) CDFA
Globodera pallida Pale cyst nematode invertebrate nematode not present moderate NAPPA Phyto
Halysidota tessellaris pale tussock moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Hylobius pales pales weevil arthropod beetle not present high CDFA (reg. A)
Molossus molossus Pallas’s mastiff bat vertebrate mammal VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Homaledra sabalella palm leafskeletonizer arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Unknown pathogenic phytoplasma 5 Palm Lethal Yellowing Phytoplasma disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cortaderia selloana pampasgrass plant grass widespread n/a (already in CA) Cal-IPC list
Steneotarsonemus spinki panicle rice mite arthropod mite not present high CDFA (reg. A)
Allium paniculatum panicled onion plant herbaceous limited n/a (already in CA) CDFA