Nerodia fasciata
Silhouette: Beth Reinke · PhyloPic
In 3 days ~60% in a week ~90%
The banded water snake or southern water snake (Nerodia fasciata) is a species of mostly aquatic, nonvenomous, colubrid snakes most commonly found in the Midwest, Southeastern United States. Nerodia fasciata is natively found from southern Illinois, south to Louisiana, and east to North Carolina and Florida. Introduced populations exist in Texas and California; other sources include eastern Texas in its natural range. In 1992, its congener Nerodia sipedon (northern or common water snake) and it were found in three sites in California by the US Fish and Wildlife Service (USFWS). Further trapping did indeed catch large numbers of them, indicating that a thriving invasive population exists in that area.
Adults of the banded water snake typically range from 56 to 107 cm (22 to 42 in) in total length, with a record size (in the Florida subspecies) of 159 cm (62.5 in) in total length. It is typically gray, greenish-gray, or brown in color, with... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Cypress National Preserve | 🇺🇸 United States | |
| 2 | Congaree National Park | 🇺🇸 United States | |
| 3 | Everglades National Park | 🇺🇸 United States | |
| 4 | Merritt Island National Wildlife Refuge | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Ecomuseum Zoo | 🇨🇦 Canada | |
| 2 | Cameron Park Zoo | 🇺🇸 United States | |
| 3 | Philadelphia Zoo | 🇺🇸 United States | |
| 4 | Oklahoma Aquarium | 🇺🇸 United States |
Possible
About 30% of wildlife watchers report a Banded Water Snake sighting in Everglades National Park on a given day, based on 220 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th most-seen of the 54 reptiles we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
June–July and October
In those months about 40% of wildlife watchers report a Banded Water Snake in Everglades National Park on a given day, against about 20% in March and December–January, the lowest months. Those are among Everglades National Park's wettest months, with about 170 mm of rain a month against 40 mm in March.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Banded Water Snake sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
3rd of 4
Of the 4 parks where we can rate Banded Water Snake sightings, Everglades National Park ranks 3rd at about 30%. The best odds are in Big Cypress National Preserve (United States, about 60%) and Congaree National Park (United States, about 50%). All parks ranked.
Same genus: Nerodia
The closest relatives of the Banded Water Snake that you can see in Everglades National Park (genus Nerodia, Watersnakes) are Florida Green Watersnake (about 30%), Saltmarsh Snake (about 20%) and Brown Watersnake (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Banded Water Snake is recorded against all the reptiles logged in Everglades National Park (220 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
