Lithobates sphenocephalus
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~30% in a week ~50%
Lithobates sphenocephalus or Rana sphenocephala, commonly known as the southern leopard frog, is a medium-sized anuran in the family Ranidae (the true frogs). The southern leopard frog is one of the 36 species currently or formerly classified in the Rana genus found in North America. It is native to eastern North America from Kansas to New Jersey to Florida. It is also an introduced species in some areas.
This frog is up to 13 cm (5.1 in) long. Males at sexual maturity average 52.9 mm (2.08 in) snout to vent length and females average 63.8 mm (2.51 in) SVL. It is green or brown in color with a yellowish ridge along each side of the back. Rounded dark spots occur on the back and sides; a light spot is seen on each tympanum. The male has larger fore limbs than the female. The breeding male's vocal sacs are spherical when inflated. The call is described as a "ratchet-like trill", "chuckling croak", or a "squeaky balloon-like sound".
The larva is mottled, and the eyes are positioned on the top of the head. It grows to 7.6 cm (3.0 in) in length before maturing. The female lays an egg mass that is "baseball-sized" when close to hatching time, and contains up to 1,500 eggs... Wikipedia →
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| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Cypress National Preserve | 🇺🇸 United States | |
| 2 | Congaree National Park | 🇺🇸 United States | |
| 3 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 4 | Everglades National Park | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Shedd Aquarium | 🇺🇸 United States | |
| 2 | Cape May County Park & Zoo | 🇺🇸 United States | |
| 3 | North Carolina Aquarium at Fort Fisher | 🇺🇸 United States | |
| 4 | Oklahoma Aquarium | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Southern Leopard Frog sighting in Houston on a given day, based on 209 verified sightings from GBIF citizen-science data. It is the 5th most-seen of the 11 amphibians we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
Any time of year
In every month with enough records, about 10% of wildlife watchers report a Southern Leopard Frog in Houston on a given day, so our monthly data shows no clear season.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Southern Leopard Frog sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 6 cities where we can rate Southern Leopard Frog sightings, Houston ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Washington (United States, about 10%).
Same genus: Lithobates
The closest relatives of the Southern Leopard Frog that you can see in Houston (genus Lithobates, American Water Frogs) are American Bullfrog (about 20%) and Green Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Southern Leopard Frog is recorded against all the amphibians logged in Houston (209 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.
