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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
Nucleorhabdovirus ccmv Cereal Chlorotic Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nucleorhabdovirus ccsv Cynodon Chlorotic Streak Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nucleorhabdovirus immv Iranian Maize Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Nucleorhabdovirus lev Lucerne enation virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Numida meleagris Helmeted guineafowl vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Nyctereutes procyonoides Racoon dog vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Nymphaea mexicana banana waterlily plant herbaceous limited n/a (already in CA) CDFA
Nymphaea odorata fragrant waterlily plant herbaceous limited n/a (already in CA) WA Weed List
Nymphicus hollandicus Cockatiel vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Nymphoides peltata yellow floating heart plant herbaceous limited n/a (already in CA) OR Weed List
Oat Red Streak Mosaic Virus Oat Red Streak Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Odocoileus hemionus Black-tailed deer vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Oebalus pugnax rice stink bug arthropod scale, aphid not present high CDFA (reg. A)
Okra Mosaic Agents Okra Mosaic Agents 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
Olea europaea olive plant woody limited n/a (already in CA) Cal-IPC list
Omphisa anastomosalis sweetpotato vine borer arthropod beetle not present moderate USDA Plant/Pest
Oncobasidium theobromae Vascular Streak Die-back of cocoa disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ononis alopecuroides foxtail restharrow plant herbaceous limited n/a (already in CA) CDFA
Onopordum acanthium Scotch thistle plant herbaceous limited n/a (already in CA) CDFA
Onopordum illyricum Illyrian thistle plant herbaceous limited n/a (already in CA) CDFA
Onopordum tauricum Taurian thistle plant herbaceous limited n/a (already in CA) CDFA
Oodinium pilularis Velvet disease invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Oospora oryzetorum Blight disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ophiomyia phaseoli bean fly arthropod fly not present low CDFA (reg. A)
Ophiostoma (Ceratocystis) ulmi Dutch elm disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ophiostoma huntii Blue Stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma ips Blue Stain Fungus disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma piceae Blue stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma piceaperdum Laural Wilt disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma piliferum Blue stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma pluriannulatum Wood stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma valdivianum Blue Stain of Beech disease fungus not present moderate ForestPathology
Opogona sacchari banana moth arthropod butterfly, moth not present high USDA Plant/Pest
Opuntia aurantiaca jointed prickly pear plant herbaceous not present low USDA Plant/Pest
Orbivirus ahsv African Horse Sickness Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Orbivirus btv Bluetongue disease virus limited n/a (already in CA) Iowa State Univ
Orconectes rusticus Rusty crayfish invertebrate crustaceans and tunicates not present high NISIC
Orgyia leucostigma whitemarked tussock moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Orobanche cooperi Cooper's broomrape plant herbaceous limited n/a (already in CA) CDFA
Orobanche minor small broomrape plant herbaceous not present high OR Weed List
Orobanche ramosa branched broomrape plant herbaceous limited n/a (already in CA) CDFA
Orobanche spp. broomrape plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Ortalis vetula Plain chachalaca vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Orthobunyavirus akav Akabane Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Orthopoxvirus cmlv Camel Pox Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Orthotomicus erosus Mediterranean pine engraver arthropod beetle not present high CDFA (reg. B)
Oryctolagus cuniculus European rabbit vertebrate mammal VALUE REQUIRED n/a (already in CA) Lacey Act
Oryx gazelle Gemsbok vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Oryza longistaminata red rice plant grass not present moderate USDA Plant/Pest
Oryza punctata red rice plant grass not present moderate USDA Plant/Pest
Oryza rufipogon red rice plant grass limited n/a (already in CA) CDFA
Oryzavirus ersv Echinochloa Ragged Stunt Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Osteopilus septentrionalis Cuban treefrog vertebrate amphibian not present low Cal Code 14:671
Ostrinia nubilalis European corn borer arthropod butterfly, moth not present high CDFA (reg. A)
Ottelia alismoides ducklettuce plant herbaceous not present high USDA Plant/Pest
Oulema melanopus cereal leaf beetle arthropod beetle not present high CDFA (reg. A)
Ovibos moshatus Musk-ox vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Ovis ammon Mouflon sheep vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Ovis aries Feral sheep vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Oxalis corniculata creeping woodsorrel plant herbaceous widespread n/a (already in CA) Weeds of CA
Oxalis pes-caprae Bermuda buttercup plant herbaceous widespread n/a (already in CA) Cal-IPC list
Pachynematus extensicornis grass sawfly arthropod bee, wasp limited n/a (already in CA) CDFA (reg. B)
Padda oryzivora Java sparrow vertebrate bird not present low Lacey Act
Palea steindachneri Wattle-necked softshell vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Pammene fasciana chestnut leaf roller arthropod butterfly, moth not present low USDA Plant/Pest
Panicum antidotale blue panicgrass plant grass limited n/a (already in CA) CDFA
Panicum miliaceum wild proso millet plant grass limited n/a (already in CA) CO Weed List
Panicum repens torpedo grass plant grass limited n/a (already in CA) AZ Weed List
Papaipema nebris stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Papilio demoleus lime swallowtail arthropod butterfly, moth not present moderate CDFA (reg. A)
Paramyxovirus hv Hendra Virus disease virus VALUE REQUIRED VALUE REQUIRED CDC
Paramyxovirus mv Menangle Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Paramyxovirus nv Nipah Virus disease virus VALUE REQUIRED VALUE REQUIRED CDC
Paramyxovirus-1 (PMV-1) Exotic newcastle disease (END) disease virus not present high National IS Info
Paratachardina pseudolobata Lobate lac scale arthropod scale, aphid not present high CDFA (reg. A)
Parentucellia viscosa yellow glandweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Parlatoria blanchardi parlatoria date scale arthropod scale, aphid not present high CDFA (reg. A)
Parlatoria pergandii chaff scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Parlatoria proteus sanseveria scale arthropod scale, aphid not present high CDFA (reg. A)
Parlatoria pseudaspidiotus vand orchid scale arthropod scale, aphid not present high CDFA (reg. A)
Parlatoria theae complex tea paralatoria scale - species complex arthropod scale, aphid not present high CDFA (reg. A)
Parlatoria vandae vanda paralatoria scale arthropod scale, aphid not present high CDFA (reg. A)
Parlatoria ziziphi black citrus scale arthropod scale, aphid not present high CDFA (reg. A)
Paroaria capitata Yellow-billed cardinal vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Paroaria coronata Red-crested cardinal vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Parus varius Varied tit vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Paspalum scrobiculatum Kodo-millet plant grass not present low USDA Plant/Pest
Passer domesticus House sparrow vertebrate bird widespread n/a (already in CA) Cal Code 14:671
Passer montanus European tree sparrow vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Pasteurella multocida Avian cholera disease bacterium widespread n/a (already in CA) Merck Vet Manual
Pavo cristatus Common peafowl vertebrate bird VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Pear Bud Drop Agent Pear Bud Drop Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pecluvirus ipcv Indian Peanut Clump Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pecluvirus pcv Peanut Clump Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pectinophora gossypiella pink bollworm arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. A)
Pectinophora scutigera pink-spotted bollworm arthropod butterfly, moth not present high USDA Plant/Pest
Peganum harmala harmel plant herbaceous not present high No list
Pelodiscus sinensis Chinese softshell vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Pennisetum ciliare buffelgrass plant grass limited n/a (already in CA) AZ Weed List