Boa imperator
Silhouette: T. Michael Keesey (from a photo by Maximilian Paradiz) · PhyloPic
In 3 days ~40% in a week ~70%
Boa imperator (or Boa constrictor imperator in common usage) is a large and heavy-bodied arboreal species of nonvenomous, constrictor-type snake in the family Boidae. One of the most popular pet snakes (often bred in captivity) in the world, B. imperator's native range is from Mexico through Central and South America (west of the Andes Mountains, mainly in Colombia), with local populations on several small Caribbean islands. It is commonly called the Central American boa, northern boa, Colombian boa (or Colombian red-tailed boa), common boa and common northern boa.
Boa imperator is a wide-ranging species, living in both Central America and the northern parts of South America. As a result, the appearance of this snake varies greatly depending on the specific locality. As one of the smaller Boa species, they average between 1.3 m (4.2 ft.) and 2.5 m (8.2 ft.) in length when fully grown, but have been known to reach 3.7 m (12 ft.). They usually weigh around 6 kg (13 lb), although females are significantly larger than males. Lifespan in the wild is around 20–30 years, but 40 can be exceeded in captivity.
Although Boa imperator exhibits almost identical patterns to Boa... Wikipedia →
Recording1:12
Colombia · 2024
© Mauricio González · iNaturalist · CC BY-NC 4.0
Recording0:10
Colombia · 2024
© juanjbarretoj · iNaturalist · CC BY-NC 4.0
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Pedro Sula | 🇭🇳 Honduras | |
| 2 | San José | 🇨🇷 Costa Rica | |
| 3 | Guayaquil | 🇪🇨 Ecuador | |
| 4 | San Salvador | 🇸🇻 El Salvador | |
| 5 | Panama City | 🇵🇦 Panama |
No species of the same family or order lives in Ría Lagartos Biosphere Reserve, so these are its closest relatives here: other reptiles.
Possible
About 20% of wildlife watchers report a Central American Boa sighting in Ría Lagartos Biosphere Reserve on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 11th most-seen of the 15 reptiles we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
March
In that month about 40% of wildlife watchers report a Central American Boa in Ría Lagartos Biosphere Reserve on a given day, against under 5% in February, April–May and July–November, the lowest months. That is one of Ría Lagartos Biosphere Reserve's driest months, with about 20 mm of rain against 150 mm in June.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Central American Boa sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
22nd of 31
Of the 31 parks where we can rate Central American Boa sightings, Ría Lagartos Biosphere Reserve ranks 22nd at about 20%. The best odds are in Bastimentos Island National Marine Park (Panama, about 40%), Santa Rosa National Park (Costa Rica, about 30%) and Corcovado National Park (Costa Rica, about 30%).
GBIF citizen-science records
It is estimated from how often the Central American Boa is recorded against all the reptiles logged in Ría Lagartos Biosphere Reserve (9 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.
