Nerodia fasciata
Silhouette: Beth Reinke · PhyloPic
In 3 days ~50% in a week ~80%
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 20% of wildlife watchers report a Banded Water Snake sighting in Houston on a given day, based on 802 verified sightings from GBIF citizen-science data. It is the 4th most-seen of the 30 reptiles we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
March and April
In those months about 30% of wildlife watchers report a Banded Water Snake in Houston on a given day, against about 10% in December and January, the lowest months.
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.
Yes
Of the 3 cities where we can rate Banded Water Snake sightings, Houston has the highest daily chance: about 20%. Next come Orlando (United States, about 20%) and Miami (United States, about 10%).
Same genus: Nerodia
The closest relatives of the Banded Water Snake that you can see in Houston (genus Nerodia, Watersnakes) are Plain-bellied Water Snake (about 10%), Diamondback Watersnake (about 10%) and Mississippi Green Watersnake (about 10%), 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 Houston (802 verified sightings), 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.
