Cyanocitta stelleri
Silhouette: T. Michael Keesey (photo by Darren Swim) · PhyloPic
In 3 days ~50% in a week ~80%
Steller's jay (Cyanocitta stelleri) is a bird native to western North America and the mountains of Central America, closely related to the blue jay (C. cristata) found in eastern North America. It is the only crested jay west of the Rocky Mountains. It is also sometimes colloquially called a "blue jay" in the Pacific Northwest, but is distinct from the blue jay of eastern North America. The species inhabits pine-oak and coniferous forests.
Steller's jay was formally described in 1788 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the crows in the genus Corvus and coined the binomial name Corvus stelleri. Gmelin based his account on "Stellers crow" that had been described in 1781 by the English ornithologist John Latham in his book A General Synopsis of Birds. Latham had examined a specimen belonging to the naturalist Joseph Banks that had been collected in Nootka Sound, Vancouver Island off the Pacific coast of Canada. The specimen was one of the birds collected on Captain James Cook's third voyage to the Pacific Ocean. During this voyage Cook visited Nootka Sound from 29 March... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yosemite National Park | 🇺🇸 United States | |
| 2 | Redwood National Park | 🇺🇸 United States | |
| 3 | Rocky Mountain National Park | 🇺🇸 United States | |
| 4 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 5 | Pacific Rim National Park Reserve | 🇨🇦 Canada | |
| 6 | Olympic National Park | 🇺🇸 United States | |
| 7 | Great Bear Rainforest | 🇨🇦 Canada | |
| 8 | Zion National Park | 🇺🇸 United States | |
| 9 | Grand Canyon National Park | 🇺🇸 United States | |
| 10 | Glacier National Park | 🇺🇸 United States | |
| 11 | Reserva de la Biosfera Mariposa Monarca | 🇲🇽 Mexico | |
| 12 | Celaque National Park | 🇭🇳 Honduras | |
| 13 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 14 | Grand Teton National Park | 🇺🇸 United States | |
| 15 | Banff National Park | 🇨🇦 Canada | |
| 16 | Kenai Fjords National Park | 🇺🇸 United States | |
| 17 | Yellowstone National Park | 🇺🇸 United States | |
| 18 | La Tigra National Park | 🇭🇳 Honduras | |
| 19 | Jasper National Park | 🇨🇦 Canada | |
| 20 | Saguaro National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Seattle | 🇺🇸 United States | |
| 2 | Portland | 🇺🇸 United States | |
| 3 | San Francisco | 🇺🇸 United States | |
| 4 | Vancouver | 🇨🇦 Canada | |
| 5 | Anchorage | 🇺🇸 United States | |
| 6 | Guatemala City | 🇬🇹 Guatemala | |
| 7 | Salt Lake City | 🇺🇸 United States | |
| 8 | Mexico City | 🇲🇽 México | |
| 9 | Las Vegas | 🇺🇸 United States | |
| 10 | Phoenix | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Arizona-Sonora Desert Museum | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Steller's Jay sighting in San Francisco on a given day, based on 21,356 verified sightings from GBIF citizen-science data. It is the 45th most-seen of the 375 birds 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.
September
In that month about 30% of wildlife watchers report a Steller's Jay in San Francisco on a given day, against about 10% in December and January, the lowest months. That is one of San Francisco's driest months, with almost no rain against 110 mm in December.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Steller's Jay sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 14
Of the 14 cities where we can rate Steller's Jay sightings, San Francisco ranks 3rd at about 20%. The best odds are in Seattle (United States, about 40%) and Portland (United States, about 40%).
Same family: Corvidae
The closest relatives of the Steller's Jay that you can see in San Francisco (family Corvidae, Crows, Jays, and Magpies) are American Crow (about 80%), Common Raven (about 40%) and California Scrub-Jay (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Steller's Jay is recorded against all the birds logged in San Francisco (21,356 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.
