Pseudalsophis occidentalis
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~30% in a week ~60%
Pseudalsophis occidentalis otherwise known as the Western Galapagos racer, is a species of snake of the family Colubridae. The snake is found on Fernandina Island and Isabela Island in the Galápagos Islands, as well as two small nearby islets, Isla Cowley and Isla Tortuga. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Galápagos Islands | 🇪🇨 Ecuador |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Fernandina Racer sighting in Galápagos Islands on a given day, based on 81 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 17th most-seen of the 31 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
June, August–September and November
In those months about 20% of wildlife watchers report a Fernandina Racer in Galápagos Islands on a given day, against about 10% in July, October and December–May, the lowest months. Those are among Galápagos Islands's driest months, with almost no rain against 50 mm in March.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Fernandina Racer sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Galápagos Islands, in our data
Galápagos Islands is the only park on Wallace's Line with enough records to rate Fernandina Racer sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Pseudalsophis
The closest relatives of the Fernandina Racer that you can see in Galápagos Islands (genus Pseudalsophis, Galápagos and Elegant Racers) are Striped Galapagos Snake (about 10%), Santa Cruz Racer (about 10%) and Darwin's Racer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Fernandina Racer is recorded against all the reptiles logged in Galápagos Islands (81 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.
