Rana aurora
Silhouette: Michael Scroggie, from original photograph by John Bettaso, USFWS (original photograph in public domain). · PhyloPic
In 3 days ~90% in a week >90%
Northern red-legged frogs (Rana aurora) are an amphibian species in the true frog family. They have greenish- to reddish-brown skin, red hind legs, dark spots across their backs, and dark facial masks. As a member of the genus Rana, this species is considered a true frog, with characteristic smooth skin and a narrow waist. These frogs are distributed along the Pacific coast of the United States and Canada, from Northern California to southwest British Columbia. There is some range overlap with the federally protected California red-legged frog. Northern red-legged frogs generally breed from January to March, laying eggs in water with submerged vegetation.
Northern red-legged frogs have decreasing population sizes and are listed as "Least Concern" by IUCN. They are a conservation strategy species in Oregon. These frogs are negatively affected by roads due to their characteristic breeding migration from upland-terrestrial to aquatic habitat. Excessive road fatalities have led to novel volunteer programs and wildlife undercrossing projects to protect urban frog populations in Portland, Oregon.
Northern red-legged frogs' genus and species name is Rana aurora. They are in... Wikipedia →
Recording2:10
2022
© Cristina Sandoval · iNaturalist · CC BY-NC 4.0
Recording0:10
Canada · 2021
© Ian Cruickshank · iNaturalist · CC BY-NC 4.0
Recording0:23
Canada · 2023
© Steven Esau · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Redwood National Park | 🇺🇸 United States | |
| 2 | Pacific Rim National Park Reserve | 🇨🇦 Canada | |
| 3 | Great Bear Rainforest | 🇨🇦 Canada | |
| 4 | Olympic National Park | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | San Francisco Zoo | 🇺🇸 United States | |
| 2 | Akron Zoo | 🇺🇸 United States | |
| 3 | Monterey Bay Aquarium | 🇺🇸 United States | |
| 4 | SEA Discovery Center | 🇺🇸 United States |
Likely
About 50% of wildlife watchers report a Northern Red-legged Frog sighting in Redwood National Park on a given day, based on 642 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 3rd most-seen of the 14 amphibians we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
August to October
In those months about 70% of wildlife watchers report a Northern Red-legged Frog in Redwood National Park on a given day, against about 30% in February, the lowest month. Those are among Redwood National Park's driest months, with about 60 mm of rain a month against 360 mm in January.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Northern Red-legged Frog sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 parks where we can rate Northern Red-legged Frog sightings, Redwood National Park has the highest daily chance: about 50%. Next come Pacific Rim National Park Reserve (Canada, about 40%) and Great Bear Rainforest (Canada, about 30%). All parks ranked.
GBIF citizen-science records
It is estimated from how often the Northern Red-legged Frog is recorded against all the amphibians logged in Redwood National Park (642 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.
