A medium-large constrictor (up to 7 ft) endemic to Puerto Rico. Closely tied to bat caves — they're famous for catching bats in mid-flight at cave entrances.

§ Quick facts

SizeLength 1.5–2.4 m
Weight1.5–4.5 kg
LifespanWild 20+ years
OrderSquamata
FamilyBoidae

§ Encyclopedia

The Puerto Rican boa, most commonly known as Culebrón, is a large species of boa endemic to Puerto Rico. It is a terrestrial and arboreal snake with a pale brown to dark brown coloration. It grows to 1.9 m (6.2 ft) in length. It feeds on small mammals such as rodents and bats, birds and sometimes anole lizards. Like most boas, it is viviparous and kills its prey using constriction.

Source: Wikipedia — Puerto Rican boa Licensed under CC BY-SA 4.0

§ Identification

Field marks. Large brown snake with dark angular markings; smooth scales; small head.

Similar species. Other Caribbean boas. Burmese Python (much larger; non-native).

Voice. Hisses defensively.

§ Diet & behavior

Diet. Birds, lizards, small mammals; constrictor.

Behavior. Largest native snake in Puerto Rico. Federal endangered status proposed; populations have declined due to habitat loss, predation by introduced mongoose, and killings by humans.

§ Range

Puerto Rico

§ Habitat

Forests, rocky outcrops, caves

§ Threats

Habitat loss, persecution, hurricane impacts.

§ Conservation status

According to the IUCN Red List, the puerto rican boa is currently classified as Least Concern.

§ What helps

Support Puerto Rican forest conservation. Don't harm boas.

Support our work More ways to help

§ Further reading

§ Sources cited

  • USFWS Puerto Rico
  • Puerto Rico Department of Natural Resources
  • IUCN Red List 2017