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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
Phalaris arundinacea reed canarygrass plant grass limited n/a (already in CA) WA Weed List
Erodium cicutarium redstem filaree plant herbaceous widespread n/a (already in CA) Cal-IPC list
Amaranthus retroflexus redroot amaranth plant herbaceous widespread n/a (already in CA) Weeds of CA
Agrilus ruficollis rednecked cane borer arthropod beetle not present high CDFA (reg. A)
Hylurgus ligniperda redhaired pine bark beetle arthropod beetle not present high CDFA (reg. B)
Xyleborus glabratus Redbay ambrosia beetle arthropod beetle not present high CDFA (reg. A)
Tetraleurodes spp. redbanded whitefly arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Selenothrips rubrocinctus redbanded thrips arthropod thrips not present high CDFA (reg. A)
Argyrotaenia velutinana redbanded leafroller arthropod butterfly, moth not present high CDFA (reg. A)
Pycnonotus jocosus Red-whiskered bulbul vertebrate bird limited n/a (already in CA) CDFA Vert List
Pycnonotus caferi Red-vented bulbul vertebrate bird VALUE REQUIRED VALUE REQUIRED ISSG 100WorstIAS
Leiocephalus schreibersii Red-sided curlytail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Agama agama Red-headed agama vertebrate reptile 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
Paroaria coronata Red-crested cardinal vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Uraeginthus benglaus Red-cheeked condon-bleu vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Quelea quelea Red-billed quelea vertebrate bird not present low Cal Code 14:671
Leiothrix lutea Red-billed leiothrix vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Clethrionomys rutilus Red-backed vole vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Ceroplastes rubens red wax scale arthropod scale, aphid not present high CDFA (reg. A)
Phytophthora fragariae Red Stele disease oomycete VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sciurus vulgaris Red squirrel vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Tetranychus evansi red spider mite arthropod mite limited n/a (already in CA) CDFA (reg. B)
Rumex acetosella red sorrel plant herbaceous widespread n/a (already in CA) Cal-IPC list
Sesbania punicea red sesbania plant woody limited n/a (already in CA) Cal-IPC list
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
Cydia funebrana red plum maggot arthropod butterfly, moth not present high USDA Plant/Pest
Rhynchophorus ferrugineus red palm weevil arthropod beetle not present high CDFA (reg. A)
Raoiella indica Red Palm Mite    arthropod mite not present high CDFA (reg. A)
Furcaspis biformis red orchard scale arthropod scale, aphid not present high CDFA (reg. A)
Gallus gallus Red jungle fowl vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS 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)
Eucalyptus camaldulensis red gum plant woody limited n/a (already in CA) Cal-IPC list
Vulpes vulpes Red Fox vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Comovirus rcmv Red Clover Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
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
Clathria polifera Red beard sponge invertebrate other limited n/a (already in CA) Exoticsguide
Mycosphaerella pini Red Band Needle Blight disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Amandava amandava Red avadavat vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Brevipalpus phoenicis red and black flat mite arthropod mite limited n/a (already in CA) CACASA
Caulacanthus ustulatus red algae plant algae unknown VALUE REQUIRED Hoffman NOAA
Saccharum ravennae ravennagrass plant grass limited n/a (already in CA) Cal-IPC list
Vulpia myuros rattail fescue plant grass widespread n/a (already in CA) Cal-IPC list
Diastrophus radicum raspberry root gall wasp arthropod bee, wasp not present moderate CDFA (reg. A)
Nepovirus rprsv Raspberry ringspot virus and its strains disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Adelphocoris rapidus rapid plant bug arthropod scale, aphid widespread n/a (already in CA) CDFA (reg. A)
Cnemidophorus lemniscatus Rainbow whiptail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Ambrosia artemisifolia ragweed plant herbaceous widespread n/a (already in CA) OR Weed List
Raphanus sativus radish plant herbaceous widespread n/a (already in CA) Cal-IPC list
Nyctereutes procyonoides Racoon dog vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Polypogon monspeliensis and subspp. rabbitfoot polypogon plant grass widespread n/a (already in CA) Cal-IPC list
Quince Yellow Blotch Agent Quince Yellow Blotch Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Trichovirus spp Quince Stunt Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Quince Sooty Ringspot Agent Quince Sooty Ringspot Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Bactrocera tryoni Queensland fruit fly arthropod fly not present moderate CDFA (reg. A)
Hieracium glomeratum queen devil hawkweed plant herbaceous not present low WA Weed List
Dreissena bugensis Quagga mussels invertebrate aquatic mollusk, freshwater limited n/a (already in CA) CAISMP
Elytrigia repens quackgrass plant grass widespread n/a (already in CA) CDFA
Protopulvinaria pyriformis pyriform scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Duponchelia fovealis pyralid moth arthropod butterfly, moth limited high 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
Megalopyge opercularis puss caterpillar arthropod butterfly, moth not present low CDFA (reg. A)
Ehrharta calycina purple veldtgrass plant grass widespread n/a (already in CA) Cal-IPC list
Porphyrio porphyrio Purple Swamphen vertebrate bird not present high Cal Code 14:671
Centaurea calcitrapa purple starthistle 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)
Cyperus rotundus purple nutsedge 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
Tribulus terrestris puncturevine plant herbaceous widespread n/a (already in CA) CDFA
Achnatherum brachychaetum punagrass plant grass limited n/a (already in CA) CDFA
Anolis cristatellus Puerto Rican crested anole vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Myxobolus (Lentospora) cerebralis Protozoic Whirling disease disease parasitic animal limited n/a (already in CA) National IS Info
Trichodinella epizootica Protozoic parasite of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Protopalina symphysodonis Protopalina symphysodonis infection of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Amaranthus albus prostrate pigweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Proeulia spp. Proeulia spp. arthropod butterfly, moth not present low USDA Plant/Pest
Dendrothrips ornatus privet thrips arthropod thrips limited n/a (already in CA) CDFA (reg. B)
Echium candicans pride-of-Madeira plant herbaceous limited n/a (already in CA) Cal-IPC list
Lactuca serriola prickly lettuce plant herbaceous widespread n/a (already in CA) Weeds of CA
Cynomys ludovicianus Prairie dog vertebrate mammal not present low CDFA Vert List
Candidatus Liberibacter solanacearum potato zebra chip disease bacterium not present VALUE REQUIRED APHIS OPIS
Alfamovirus pyv Potato Yellowing Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Crinivirus pyvv Potato Yellow Vein Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 8 Potato witches broom disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Synchytrium endobioticum Potato Wart/Select Agent disease fungus not present low EPPO
Potyvirus pvy Potato Virus Y disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Potyvirus pvv Potato Virus V disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus pvu Potato Virus U disease virus VALUE REQUIRED VALUE REQUIRED No list
Trichovirus pvt Potato Virus T disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Potexvirus (?) or Potyvirus (?) Potato veinal necrosis virus (PVYN) disease virus VALUE REQUIRED VALUE REQUIRED No list
Thecaphora (Angiosorus) solani Potato smut disease fungus not present low EPPO
Unknown pathogenic phytoplasma 7 Potato Purple Top Roll disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Carlavirus pvm Potato Mop Top Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS