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Chocolate Desert Millipede Care Guide

Orthoporus ornatus

Beginner-friendly Arid / Semi-arid Burrowing

Chocolate desert millipedes are large southwestern detritivores adapted to arid and semi-arid habitats. Good captive care combines strong airflow and drier surface conditions with reliable moisture deeper in part of the substrate.

Desert does not mean bone-dry. These millipedes need a protected damp zone below the surface while the rest of the enclosure remains substantially drier and well ventilated.
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Enclosure and Ventilation

  • Use at least a ventilated 10-gallon enclosure for one adult; provide more floor space for groups.
  • A secure, heavily ventilated lid is important because this species benefits from more airflow than tropical millipedes.
  • Keep cork, hardwood, and other heavy decor stable so burrowing animals cannot undermine it.

Temperature and Moisture Gradient

  • Maintain about 72-82°F, with normal room temperatures in the mid-70s working well.
  • Ambient humidity around 40-60% is appropriate when a protected damp zone remains available in the substrate.
  • Keep roughly one-third of the substrate slightly damp at depth while the rest, especially the surface, remains noticeably drier.

Substrate Requirements

  • Provide at least 6 inches of burrowable substrate; deeper is beneficial for adults.
  • Use fertilizer-free organic topsoil with roughly 20-30% washed play sand plus generous decaying hardwood leaves and soft rotten wood.
  • Do not substitute plain coconut fiber for the edible leaf and hardwood material the millipede relies on.

Food and Calcium

  • Decomposing hardwood leaves and rotten wood should remain available continuously as the primary diet.
  • Offer small portions of squash, sweet potato, carrot, cucumber, zucchini, mushroom, greens, or occasional fruit 1-3 times weekly.
  • Keep a calcium source available and remove fresh foods before they spoil.

Molting, Groups and Handling

  • Long periods underground can be normal; never dig up a resting or molting millipede without a true emergency.
  • Same-species groups are generally peaceful when space, substrate, and food are adequate.
  • Handle gently over a safe surface and wash afterward because defensive secretions can stain or irritate skin and eyes.