Trimorphodon quadruplex
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~60% in a week ~80%
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 |
Possible
About 20% of wildlife watchers report a Central American Lyresnake sighting in Ostional Wildlife Refuge on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 11th most-seen of the 20 reptiles we can rate there. Over three days the chance rises to about 60%, and over a week to about 80%, if each day is a fresh chance.
April
In that month about 50% of wildlife watchers report a Central American Lyresnake in Ostional Wildlife Refuge on a given day, against under 5% in January, March and September–October, the lowest months. That is one of Ostional Wildlife Refuge's driest months, with about 140 mm of rain against 560 mm in October.
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.
3rd of 5
Of the 5 parks where we can rate Central American Lyresnake sightings, Ostional Wildlife Refuge ranks 3rd at about 20%. The best odds are in Santa Rosa National Park (Costa Rica, about 40%) and Palo Verde 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 Ostional Wildlife Refuge (family Colubridae, Colubrid Snakes) are Köhler’s Vine Snake (about 30%), Black-necked Centipede Snake (about 20%) and Rhombic Cat-eyed Snake (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 Ostional Wildlife Refuge (13 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.
