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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
Anolis cristatellus Puerto Rican crested anole vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Achnatherum brachychaetum punagrass plant grass limited n/a (already in CA) CDFA
Tribulus terrestris puncturevine plant herbaceous widespread n/a (already in CA) CDFA
Lythrum salicaria purple loosestrife plant herbaceous limited n/a (already in CA) CDFA
Lythrum virgatum purple loosestrife plant herbaceous not present low MT Weed List
Cyperus rotundus purple nutsedge plant herbaceous widespread n/a (already in CA) CDFA
Lepidosaphes beckii purple scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Centaurea calcitrapa purple starthistle plant herbaceous widespread n/a (already in CA) CDFA
Porphyrio porphyrio Purple Swamphen vertebrate bird not present high Cal Code 14:671
Ehrharta calycina purple veldtgrass plant grass widespread n/a (already in CA) Cal-IPC list
Megalopyge opercularis puss caterpillar arthropod butterfly, moth not present low CDFA (reg. A)
Pyracantha angustifolia pyracantha plant woody limited n/a (already in CA) Cal-IPC list
Pyracantha coccinea pyracantha plant woody limited n/a (already in CA) Cal-IPC list
Pyracantha crenulata pyracantha plant woody limited n/a (already in CA) Cal-IPC list
Duponchelia fovealis pyralid moth arthropod butterfly, moth limited high CDFA (reg. A)
Protopulvinaria pyriformis pyriform scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Elytrigia repens quackgrass plant grass widespread n/a (already in CA) CDFA
Dreissena bugensis Quagga mussels invertebrate aquatic mollusk, freshwater limited n/a (already in CA) CAISMP
Hieracium glomeratum queen devil hawkweed plant herbaceous not present low WA Weed List
Bactrocera tryoni Queensland fruit fly arthropod fly not present moderate CDFA (reg. A)
Quince Sooty Ringspot Agent Quince Sooty Ringspot Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Trichovirus spp Quince Stunt Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Quince Yellow Blotch Agent Quince Yellow Blotch Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Polypogon monspeliensis and subspp. rabbitfoot polypogon plant grass widespread n/a (already in CA) Cal-IPC list
Nyctereutes procyonoides Racoon dog vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Raphanus sativus radish plant herbaceous widespread n/a (already in CA) Cal-IPC list
Ambrosia artemisifolia ragweed plant herbaceous widespread n/a (already in CA) OR Weed List
Cnemidophorus lemniscatus Rainbow whiptail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Adelphocoris rapidus rapid plant bug arthropod scale, aphid widespread n/a (already in CA) CDFA (reg. A)
Nepovirus rprsv Raspberry ringspot virus and its strains disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Diastrophus radicum raspberry root gall wasp arthropod bee, wasp not present moderate CDFA (reg. A)
Vulpia myuros rattail fescue plant grass widespread n/a (already in CA) Cal-IPC list
Saccharum ravennae ravennagrass plant grass limited n/a (already in CA) Cal-IPC list
Caulacanthus ustulatus red algae plant algae unknown VALUE REQUIRED Hoffman NOAA
Brevipalpus phoenicis red and black flat mite arthropod mite limited n/a (already in CA) CACASA
Amandava amandava Red avadavat vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Mycosphaerella pini Red Band Needle Blight disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Clathria polifera Red beard sponge invertebrate other limited n/a (already in CA) Exoticsguide
Bromus madritensis ssp. rubens red brome plant grass widespread n/a (already in CA) Cal-IPC list
Bromus madritensis ssp. rubens red brome plant grass widespread n/a (already in CA) Cal-IPC list
Comovirus rcmv Red Clover Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Vulpes vulpes Red Fox vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Eucalyptus camaldulensis red gum plant woody limited n/a (already in CA) Cal-IPC list
Solenopsis invicta red imported fire ant arthropod bee, wasp limited n/a (already in CA) CDFA (reg. A)
Solenopsis saevissima red imported fire ant arthropod bee, wasp not present moderate CDFA (reg. A)
Gallus gallus Red jungle fowl vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Furcaspis biformis red orchard scale arthropod scale, aphid not present high CDFA (reg. A)
Raoiella indica Red Palm Mite    arthropod mite not present high CDFA (reg. A)
Rhynchophorus ferrugineus red palm weevil arthropod beetle not present high CDFA (reg. A)
Cydia funebrana red plum maggot arthropod butterfly, moth not present high USDA Plant/Pest
Oryza rufipogon red rice plant grass limited n/a (already in CA) CDFA
Oryza longistaminata red rice plant grass not present moderate USDA Plant/Pest
Oryza punctata red rice plant grass not present moderate USDA Plant/Pest
Sesbania punicea red sesbania plant woody limited n/a (already in CA) Cal-IPC list
Rumex acetosella red sorrel plant herbaceous widespread n/a (already in CA) Cal-IPC list
Tetranychus evansi red spider mite arthropod mite limited n/a (already in CA) CDFA (reg. B)
Sciurus vulgaris Red squirrel vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Phytophthora fragariae Red Stele disease oomycete VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ceroplastes rubens red wax scale arthropod scale, aphid not present high CDFA (reg. A)
Clethrionomys rutilus Red-backed vole vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Leiothrix lutea Red-billed leiothrix vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Quelea quelea Red-billed quelea vertebrate bird not present low Cal Code 14:671
Uraeginthus benglaus Red-cheeked condon-bleu vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Paroaria coronata Red-crested cardinal vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Trachemys scripta elegans Red-eared slider vertebrate reptile limited n/a (already in CA) Cal Code 14:671
Agama agama Red-headed agama vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Leiocephalus schreibersii Red-sided curlytail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Pycnonotus caferi Red-vented bulbul vertebrate bird VALUE REQUIRED VALUE REQUIRED ISSG 100WorstIAS
Pycnonotus jocosus Red-whiskered bulbul vertebrate bird limited n/a (already in CA) CDFA Vert List
Argyrotaenia velutinana redbanded leafroller arthropod butterfly, moth not present high CDFA (reg. A)
Selenothrips rubrocinctus redbanded thrips arthropod thrips not present high CDFA (reg. A)
Tetraleurodes spp. redbanded whitefly arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Xyleborus glabratus Redbay ambrosia beetle arthropod beetle not present high CDFA (reg. A)
Hylurgus ligniperda redhaired pine bark beetle arthropod beetle not present high CDFA (reg. B)
Agrilus ruficollis rednecked cane borer arthropod beetle not present high CDFA (reg. A)
Amaranthus retroflexus redroot amaranth plant herbaceous widespread n/a (already in CA) Weeds of CA
Erodium cicutarium redstem filaree plant herbaceous widespread n/a (already in CA) Cal-IPC list
Phalaris arundinacea reed canarygrass plant grass limited n/a (already in CA) WA Weed List
Syrmaticus reevesii Reeve’s pheasant vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Rotylenchulus reniformis Reniform Nematode invertebrate nematode not present moderate CDFA (reg. A)
Reoviridae-related pathogenic virus (REO-III, REO-IV) Reo-like viruses disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Macaca mulatto Rhesus monkey vertebrate mammal VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Massileurodes chittendeni rhodendron whitefly arthropod scale, aphid not present high CDFA (reg. A)
Phytophthora kernoviae Rhododendron Phytopthora disease disease oomycete VALUE REQUIRED VALUE REQUIRED No list
Chrysomyxa ledi var. rhododendri Rhododendron-spruce Needle Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Geukensia demissa Ribbed horsemussel invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Echinochloa phyllopogon rice barnyardgrass plant grass limited n/a (already in CA) Weeds of CA
Pyricularia grisea Rice Blast disease fungus limited n/a (already in CA) APSNet
Sogatodes orizicola rice delphacid arthropod scale, aphid not present moderate CDFA (reg. A)
Phytoreovirus rdv Rice Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoreovirus rgdv Rice Gall Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Corcyra cephalonica rice moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Leptocorisa acuta rice seed bug arthropod scale, aphid not present moderate USDA Plant/Pest
Chilo plejadellus rice stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Oebalus pugnax rice stink bug arthropod scale, aphid not present high CDFA (reg. A)
Scotinophara lurida rice stinkbug arthropod scale, aphid not present high CDFA (reg. A)
Waikavirus rtsv Rice Tungro Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Tenuivirus rwsv Rice Wilted Stunt Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma ryd-mlo Rice Yellow Dwarf disease phytoplasma VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Sobemovirus rymv Rice Yellow Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS