Trimorphodon quadruplex
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~80% in a week >90%
Trimorphodon quadruplex, the Central American lyre snake, is a species of snake of the family Colubridae. The snake is found in Nicaragua, Honduras, El Salvador. and Costa Rica. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santa Rosa National Park | 🇨🇷 Costa Rica | |
| 2 | Palo Verde National Park | 🇨🇷 Costa Rica | |
| 3 | Ostional Wildlife Refuge | 🇨🇷 Costa Rica | |
| 4 | Las Baulas Marine National Park | 🇨🇷 Costa Rica | |
| 5 | Cabo Blanco Absolute Nature Reserve | 🇨🇷 Costa Rica |
Likely
About 40% of wildlife watchers report a Central American Lyresnake sighting in Palo Verde National Park on a given day, based on 31 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 6th most-seen of the 21 reptiles we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
July–August and October
In those months about 50% of wildlife watchers report a Central American Lyresnake in Palo Verde National Park on a given day, against under 5% in February, April and September, the lowest months. Those are among Palo Verde National Park's wettest months, with about 330 mm of rain a month against almost none in February.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Central American Lyresnake sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Among the best
Of the 5 parks where we can rate Central American Lyresnake sightings, Palo Verde National Park ranks 2nd at about 40%, level with the leaders once rounded. The best odds are in Santa Rosa National Park (Costa Rica, about 40%). All parks ranked.
Same family: Colubridae
The closest relatives of the Central American Lyresnake that you can see in Palo Verde National Park (family Colubridae, Colubrid Snakes) are Rhombic Cat-eyed Snake (about 40%), Western Ribbon Snake (about 20%) and Cope's Snail Sucker (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Central American Lyresnake is recorded against all the reptiles logged in Palo Verde National Park (31 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.
