NAS Alert System



The 10 most recent alerts are available at RSS

Total of 2720 alerts match your criteria. Click on each Specimen ID to get details about the collection.
Specimen IDDateSpeciesNew AreaAlert Risk Map Comments
1654337 11/16/2020 yellow floating-heart
Nymphoides peltata
County: Centre (PA)
Drainage: Bald Eagle (02050204)
1654959 11/16/2020 parrot feather
Myriophyllum aquaticum
Drainage: Lower Susquehanna (02050306)
1655008 11/16/2020 water lettuce
Pistia stratiotes
County: Howard (MD)
Drainage: Patuxent (02060006)
1653660 10/27/2020 water lettuce
Pistia stratiotes
County: Macomb (MI)
1653614 10/20/2020 reed mannagrass
Glyceria maxima
County: Portage (WI)
1653615 10/20/2020 reed mannagrass
Glyceria maxima
County: Price (WI)
Drainage: South Fork Flambeau (07050003)
1653521 10/10/2020 marsh dewflower
Murdannia keisak
County: Tift (GA)
Drainage: Withlacoochee (03110203)
1653520 10/10/2020 Brazilian waterweed
Egeria densa
County: Tift (GA)
Drainage: Withlacoochee (03110203)
1652558 10/6/2020 pirapitinga, red-bellied pacu
Piaractus brachypomus
County: Lauderdale (TN)
Drainage: Lower Mississippi-Memphis (08010100)
1652555 10/5/2020 cuchia
Monopterus cuchia
County: Kings (NY)
Drainage: Southern Long Island (02030202)
1652542 9/30/2020 zebra mussel
Dreissena polymorpha
County: Tuscaloosa (AL)
1652511 9/24/2020 Cuban bulrush
Cyperus blepharoleptos
State: AR
County: Crittenden (AR)
Drainage: Lower St. Francis (08020203)
1652503 9/24/2020 floating water hyacinth
Pontederia crassipes
County: Erie (PA)
Drainage: Lake Erie (04120200)
1652504 9/24/2020 water lettuce
Pistia stratiotes
County: Erie (PA)
1652427 9/22/2020 Rusty Crayfish
Faxonius rusticus
County: Sherburne (MN)
1652425 9/22/2020 giant salvinia
Salvinia molesta
County: Columbus (NC)
Drainage: Lumber (03040203)
1652432 9/22/2020 quagga mussel
Dreissena rostriformis
County: Otsego (NY)
Drainage: Upper Susquehanna (02050101)
1652422 9/19/2020 giant salvinia
Salvinia molesta
State: SC
County: Beaufort (SC)
Drainage: Calibogue Sound-Wright River (03060110)
*Bonus* Previously found in 2011 in nearby drainage
1652419 9/18/2020 Chinese mysterysnail
Cipangopaludina chinensis
County: Mercer (WV)
Drainage: Middle New (05050002)
1652415 9/16/2020 Black Carp
Mylopharyngodon piceus
County: Perry (MO)
1652418 9/16/2020 Black Carp (diploid)
Mylopharyngodon piceus
County: Sangamon (IL)
Drainage: Lower Sangamon (07130008)
1652396 9/13/2020 Grass Carp
Ctenopharyngodon idella
County: Jackson (MN)
Drainage: Little Sioux (10230003)
1652395 9/13/2020 Bighead Carp
Hypophthalmichthys nobilis
County: Jackson (MN)
1652393 9/11/2020 Green Sunfish
Lepomis cyanellus
State: NH
County: Hillsborough (NH)
1652390 9/10/2020 Japanese mysterysnail
Cipangopaludina japonica
State: NE
*Bonus* First report of this species in the state in 22 years


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. [2020]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/1/2020].

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 queries involving fish, please contact Matthew Neilson. For queries involving invertebrates, contact Amy Benson.