LOCUS Scales

Boa (BCI — Boa imperator)

Quick sourced reference values. LOCUS Scales' full breeding/genetics toolset is built specifically for ball pythons — this page is a courtesy reference for other species.

Scientific name

Boa imperator

Native range

Mexico, Central America, and northern South America (mainly Colombia)

Lifespan

20-30 years

Lifestyle

🌍🌳 Semi-arboreal (mostly terrestrial, climbs occasionally)

Diet: Carnivore — appropriately sized rats, frozen-thawed. Adults can take larger prey than most other snakes on this list.

Feeding frequency: Baby: every 5-7 days. Juvenile: every 7-10 days. Adult: every 14-21 days (adults eat less often than juveniles, more so than other species on this list).

Substrate: Aspen shavings or a naturalistic humidity-retentive substrate (coconut fiber, soil mix). Never pine or cedar — toxic oils.

UVB: Not strictly documented as essential, but low-to-moderate UVB (Ferguson zone 1-2, 2-6%) is increasingly recommended by recent sources as beneficial.

Incubation: Ovoviviparous species (live birth, no egg-laying) — gestation ~100-120 days from ovulation. Litters vary widely, average ~15-25 newborns, with some stillbirths or "slugs" (unfertilized eggs) common and normal.

Clutches per mating: Generally 1 birth per successful mating.
Average egg count: 10-50 newborns (average ~15-25).

Warm side

29°C

Cool side

24°C

Humidity

65%

BCI = "common" or "Colombian" boa — by far the most common in captivity, smaller and calmer than the BCC (see separate care sheet). Often mislabeled "red-tailed boa" in pet stores, though that name really belongs to the BCC — the two are now considered distinct species (Boa imperator vs Boa constrictor), not just subspecies as previously described.

🏠 Enclosure size — Baby/juvenile: 36×18×18in · Sub-adult: 48×24×24in · Adult: 72×24×24in minimum

Source: reptilesencaptivite.com

Common questions

BCI, BCC, "red-tailed boa" — what's the difference?

BCI (Boa imperator) is the common/Colombian boa — the one you see almost everywhere in captivity, smaller, calmer, cheaper. BCC (Boa constrictor constrictor) is the "true" red-tail — bigger, pickier about humidity, more expensive, much less common as a pet. Many sellers call their BCI a "red-tailed boa" by mistake (or to charge more) — that name really belongs to the BCC.

Can I keep it with another snake?

No — a solitary species like the vast majority of snakes. Cohabiting increases chronic stress and disease-transmission risk.

My female refuses to eat — is that normal?

Common if she's gravid — many females reliably refuse food for the entire gestation period. If she's clearly not gravid and refuses several meals in a row, check temperatures before worrying.

At what age/size does growth slow down?

Rapid growth for the first 2-3 years, then it slows — but a boa keeps growing slowly for life, unlike some species that plateau sharply. Plan for an adult-sized enclosure fairly early rather than constantly upsizing.

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General reference content — does not replace veterinary advice.