Frogs and toads around San Francisco
San Francisco, California, United States
Every measure here is worked out per 5 degree square, so this covers the wider area around San Francisco (35° to 40° latitude, -125° to -120° longitude, about 550 km across), not the city alone. Counts are shares of all frogs and toads records in the same weeks, so busier stations do not inflate them (methods).
Arrived in the last four weeks
No frogs and toads arrived here in these weeks last year, as far as the records show.
Expected in the next six weeks
No arrivals expected here in the next six weeks, going by last year.
Dates are last year's first regular records after at least six weeks away, with each species' own uncertainty on its page. Each species page can email you when it turns up.
Most recorded, last eight weeks
| Species | Records | Per 1,000 |
|---|---|---|
| Houston Toad Anaxyrus houstonensis | 22,546 | 867.3 |
| Wood Frog Lithobates sylvaticus | 1,141 | 43.9 |
| American Bullfrog Lithobates catesbeianus | 970 | 37.3 |
| Southern Toad Anaxyrus terrestris | 738 | 28.4 |
| Green Frog Lithobates clamitans | 263 | 10.1 |
| Pacific Chorus Frog Hyliola regilla | 161 | 6.2 |
| American Toad Anaxyrus americanus | 101 | 3.9 |
| Great Plains Toad Anaxyrus cognatus | 30 | 1.2 |
| Gulf Coast Toad Incilius valliceps | 26 | 1.0 |
| Yosemite Toad Anaxyrus canorus | 5 | 0.2 |
| Pacific Treefrog Pseudacris regilla | 4 | 0.2 |
| Coastal Giant Salamander Dicamptodon tenebrosus | 3 | 0.1 |
| Foothill Yellow-legged Frog Rana boylii | 3 | 0.1 |
How well this area is covered
Watched in 12 of the last 12 weeks for frogs and toads (enough records to count; unwatched weeks say nothing about absence). Active stations here in the last 30 days: 398 BirdWeather. Add a station to fill the gap.