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Reptiles

Rosy Boa

Lichanura trivirgata

Slow, docile, desert-dwelling small boa  ·  Beginner

Rosy Boa

Connor Long · CC BY-SA 4.0 — Wikimedia Commons

Lifespan
18-25 years
Adult size
60-110cm (2-3.5ft)
Min. habitat
Vivarium 90x45x45cm
Social needs
Solitary
Diet
Carnivore - frozen/thawed rodents
Time
Low - feed every 1-2 weeks
Cost
Low

Overview

  • Rosy boas are small, slow-moving North American boas from arid regions, valued for their calm temperament and longitudinal stripes.
  • They are among the most docile snakes in the hobby and rarely bite.
  • The desert rosy boa (Lichanura trivirgata) and the coastal rosy boa (Lichanura orcutti) are now treated as separate species.
  • Their modest size, long lifespan, and easygoing nature make them good beginner boas.
  • As true boas they give live birth rather than laying eggs, and captive-bred animals are readily available.

Housing

  • An adult does well in a 90x45x45cm vivarium with a dry substrate it can burrow into, such as aspen or a sand-soil mix.
  • Provide hides on both the warm and cool ends and some low climbing decor, though they are mostly terrestrial.
  • Provide a basking area of 30-32C and a cool side around 22-24C using a thermostat.
  • Keep humidity low, around 30-40%, as these arid-adapted snakes are prone to respiratory and skin problems in damp setups.

Diet

  • Rosy boas are carnivores that eat frozen-thawed rodents sized to their girth.
  • They have slow metabolisms and modest appetites, so feed adults every 10-14 days and juveniles every 5-7 days.
  • They are prone to obesity if fed too often, so avoid overfeeding.
  • Most are good feeders; offer prey in a quiet setting.
  • Provide clean water at all times, though they drink relatively little.

Health

  • Rosy boas are hardy when kept dry and warm, but excess humidity can lead to respiratory infections and scale rot.
  • Obesity from overfeeding is the most common health issue in captivity.
  • Keep the enclosure dry, with a humid hide offered only during sheds.
  • Watch for retained eye caps and incomplete sheds.
  • Quarantine new arrivals and check for mites, and have a reptile-savvy vet review any wheezing or skin changes.

Temperament

  • Rosy boas are among the gentlest snakes available, moving slowly and almost never striking defensively.
  • They tolerate handling well and suit nervous or first-time keepers.
  • They may musk when first picked up but usually settle quickly.
  • Their relaxed pace makes them easy to handle, including for supervised children.
  • Avoid handling for a day or two after feeding.

A good fit for

  • First-time and nervous keepers
  • Those wanting a small, long-lived boa
  • Keepers with limited space
  • People seeking a very docile snake

Common mistakes to avoid

  • High humidity causes respiratory illness
  • Easily overfed - prone to obesity
  • Needs a dry, desert-style setup
  • Slow metabolism means infrequent feeding
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