Pseudacris triseriata
In 3 days ~10% in a week ~20%
The western chorus frog (Pseudacris triseriata), also known as striped chorus frog, or midland chorus frog is a species of frog found in Canada and the United States. Western chorus frogs are small 40 mm (1.6 in), smooth skinned, and greenish-grey, reddish, olive, or brown in color. Differences in color can occur locally and should not be confused for range-specific populations. Typically, these frogs have three dark-brown or grey stripes which extend down the entire dorsal side. The dorsal stripes can be broken up, reduced, or even absent in certain specimens. The white or cream-colored underside or ventral side of the frog typically has dark, scattered flecks. A single white stripe runs along the upper lip, and a heavy dark stripe runs across the eye and along each side from the snout to the leg. A dark triangular spot on the head may also be seen in some individuals. These frogs have small, round toes without pads and very little webbing between each toe.
Typically, males are smaller than females, and can be told apart from the females by their yellow vocal sacs when calling. When not calling, this sac looks like a dark, loose flap of skin beneath the throat. Tadpoles... Wikipedia →
Recording0:08
Canada · 2026
© Mike Ewings · iNaturalist · CC BY-NC 4.0
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United States · 2025
© daphnian · iNaturalist · CC BY-NC 4.0
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United States · 2024
© Brad Von Blon · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Toronto | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Western Chorus Frog sighting in Toronto on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 12th most-seen of the 12 amphibians we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Western Chorus Frog in Toronto on a given day, so our monthly data shows no clear season.
Only Toronto, in our data
Toronto is the only city on Wallace's Line with enough records to rate Western Chorus Frog sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Western Chorus Frog is recorded against all the amphibians logged in Toronto (11 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.
