NAS Alert System



The 10 most recent alerts are available at RSS

Total of 3409 alerts match your criteria. Click on each Specimen ID to get details about the collection.
Specimen IDDateSpeciesNew AreaAlert Risk Map Comments
1724604 2/7/2024 Croaking Gourami
Trichopsis vittata
County: Broward (FL)
Drainage: Florida Southeast Coast (03090206)
1724596 2/5/2024 Round Goby
Neogobius melanostomus
State: MO
County: Perry (MO)
Drainage: Upper Mississippi-Cape Girardeau (07140105)
1724595 2/5/2024 Northern Snakehead
Channa argus
County: Cumberland (PA)
Drainage: Lower Susquehanna-Swatara (02050305)
1724355 1/8/2024 Australian Green Treefrog
Ranoidea caerulea
State: VA
County: Chesapeake City (VA)
Drainage: Hampton Roads (02080208)
1724251 1/8/2024 Dyeing Poison Dart Frog, Blue Poison Dart Frog
Dendrobates tinctorius
Country: US
State: CA
*Bonus* New species in US
1724357 1/8/2024 mysterysnail
Cipangopaludina sp.
County: Troup (GA)
Drainage: Middle Chattahoochee-Lake Harding (03130002)
1724267 1/8/2024 Bocourt swimming crab
Callinectes bocourti
County: Camden (GA)
Drainage: St. Marys (03070204)
1724250 1/8/2024 Red-bellied Short-necked Turtle
Emydura subglobosa
County: Miami-Dade (FL)
Drainage: Florida Southeast Coast (03090206)
1724183 12/21/2023 New Zealand mudsnail
Potamopyrgus antipodarum
County: Linn (OR)
Drainage: South Santiam (17090006)
1724159 12/15/2023 Red-eared Slider
Trachemys scripta
County: Westmoreland (PA)
Drainage: Lower Monongahela (05020005)
1724157 12/15/2023 roundleaf toothcup
Rotala rotundifolia
County: Lee (FL)
Drainage: Caloosahatchee (03090205)
*Bonus* First time in the Caloosahatchee River
1724158 12/15/2023 giant salvinia
Salvinia molesta
State: FL
County: Collier (FL)
Drainage: Big Cypress Swamp (03090204)
*Bonus* First time in the Cocohatchee Canal and last reported south of the canal in 2014
1724148 12/7/2023 zebra mussel
Dreissena polymorpha
County: Val Verde (TX)
Drainage: Lower Devils (13040302)
1724135 12/1/2023 flowering rush
Butomus umbellatus
County: Goodhue (MN)
Drainage: Rush-Vermillion (07040001)
1724119 11/27/2023 American alligator
Alligator mississippiensis
County: Armstrong (PA)
Drainage: Kiskiminetas (05010008)
1724117 11/17/2023 giant salvinia
Salvinia molesta
County: Duval (FL)
Drainage: Lower St. Johns (03080103)
1715824 11/9/2023 American alligator
Alligator mississippiensis
County: Milwaukee (WI)
Drainage: Lake Michigan (04190000)
1715814 11/7/2023 northern hydrilla
Hydrilla verticillata
County: Litchfield (CT)
Drainage: Housatonic (01100005)
1715821 11/7/2023 northern hydrilla
Hydrilla verticillata
Drainage: Westfield River (01080206)
1715815 11/7/2023 northern hydrilla
Hydrilla verticillata
Drainage: Thames (01100003)
1715817 11/7/2023 northern hydrilla
Hydrilla verticillata
County: Tolland (CT)
Drainage: Shetucket River (01100002)
1715802 11/6/2023 mudmats
Glossostigma cleistanthum
County: Hunterdon (NJ)
Drainage: Raritan (02030105)
1715799 11/3/2023 Signal Crayfish
Pacifastacus leniusculus
State: MN
County: Douglas (MN)
Drainage: Long Prairie (07010108)
1715760 10/31/2023 Silver Carp
Hypophthalmichthys molitrix
County: Lincoln (NE)
Drainage: Middle Platte-Buffalo (10200101)
1715753 10/30/2023 zebra mussel
Dreissena polymorpha
County: Roberts (SD)
Drainage: Upper Minnesota (07020001)


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/28/2024].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.