Therea olegrandjeani, commonly known as the Question Mark Cockroach, is a beautifully patterned species native to India, particularly the Telangana and Andhra Pradesh regions. Its name comes from the distinctive white markings on its glossy black pronotum, which resemble a question mark. These markings are thought to serve as a form of mimicry or warning, possibly deterring predators by imitating toxic beetles.
 
In the wild, T. olegrandjeani inhabits dry scrub forests and leaf litter, where adults scuttle across the surface while nymphs burrow into the substrate. Reproduction is slow—nymphs can take up to two years to mature—making this species a long-term commitment for keepers. In captivity, they thrive in well-ventilated enclosures with deep substrate, leaf litter, and cork bark for hiding. Their diet includes fresh fruits, vegetables, and protein-rich dry mixes, and they benefit from access to deciduous leaf humus