Blue death-feigning beetle

Asbolus verrucosus

Also known as blue death feigning beetle, desert ironclad beetle

Invertebrates › Darkling and feeder beetles (Coleoptera) › Tenebrionidae (Darkling and feeder beetles)

Pet trade

Experience: Beginner

FamilyDarkling and feeder beetles

Kept byPet trade

HabitatDeserts and grain stores

Care at a glance

Species-specific values

Values researched for this exact species. Where they differ from the group guide below, follow these. Air, surface and water temperatures are listed separately, and each source is kept as published rather than averaged.

Warm surface temperature	85 degF approximately Veterinary sheet specifies surface temperature, mid-80s; not enclosure air.	352
Cool surface temperature	75 degF approximately Mid-70s surface zone; provide a gradient.	352
Diet	Protein from dead insects/fish foods plus vegetables. Desert adult beetles; grain-only feeder recipes are unsuitable.	352

Care guide

Group care guide

Darkling beetles (mealworms and relatives)

Applies to most species in this group. Habitat: Deserts and grain stores. Individual species can differ, so compare with the species numbers above and the linked sources.

Housing & setup

Dry bins with bran or oat substrate; blue death-feigning beetles need sand and wood hides.

Sources 138 352

Diet

Do not apply a grain-only feeder-culture diet to desert darklings. Asbolus verrucosus adults need protein foods such as dead insects or fish food, with vegetables as additions.

Sources 138 352

Health watch

Very hardy; mealworms and superworms are popular feeders.

Sources 138 352

Understanding the animal

About this animal

It is highly adapted to hot environments and is omnivorous, consuming dead insects, fruits, lichen, and other plant matter. When threatened, the beetles are able to feign death.

Quoted from the Wikipedia article “Asbolus verrucosus” (CC BY-SA 4.0) 174

In the wild

Quoted from the matching sections of reputable sources for this exact species. Specialist databases are used first; Wikipedia (community-edited, CC BY-SA 4.0) only fills gaps. Other sources are short credited quotes.

Overview

Asbolus verrucosus LeConte, 1851, also known as the desert ironclad beetle or blue death feigning beetle, is a species of darkling beetle native to southwestern United States (southern California to Utah and New Mexico) and northwestern Mexico, where it inhabits dry, sandy habitats such as the Sonoran and Mojave Deserts. It is highly adapted to hot environments and is omnivorous, consuming dead insects, fruits, lichen, and other plant matter. When threatened, the beetles are able to feign death. A. verrucosus larvae may reflex bleed during their death-feigning ritual. — Wikipedia (community-edited)

Appearance and size

The blue death feigning beetle grows to around 18–21 mm length. The species name verrucosus, meaning 'warty', refers to the characteristic bumps on the beetle's elytra. Their powdery blue hue is due to a wax coating on their bodies that prevents loss of moisture. — Wikipedia (community-edited)

Native climate (measured)

Warm-season highs	about 104°F (up to 108°F in the hottest sampled areas)
Cool-season lows	about 36°F (down to 29°F in the coldest sampled areas)
Average temperature	62–73°F across sampled records
Relative humidity	32–38% on average (driest month about 21%)
Rainfall	about 155 mm a year
Winters	Cool to cold winters (lows around 36°F) in much of its native range. Seasonal slowdown may be relevant, but species-specific biology determines whether brumation or hibernation occurs.

Measured at 129 wild occurrence records sampled against WorldClim 2.1 climate data (1970–2000 averages). Air conditions in the range are ecological context, not enclosure settings: microhabitats such as burrows, leaf litter or basking rocks can be cooler, warmer or more humid.

Federal legal snapshot

No federal permit to keep

USDA plant pest permits. Moving live non-native insects, snails and other potential plant pests between states generally requires a USDA APHIS PPQ 526 permit.

State law decides most of it. Each state sets its own permits and bans for exotic, native, venomous and dangerous animals, and cities and counties can be stricter. Find your state agency →

Not covered by the Animal Welfare Act

The Act only covers warm-blooded animals. Reptiles, amphibians, fish and invertebrates have no federal care standards, even at licensed facilities; state and local rules may still apply.

Kept in captivity?

Every species on this site needs evidence that people actually keep it. For this one:

Included in our hand-checked list of animals kept as pets, livestock or in zoos
228 iNaturalist observations of captive animals

Sources for this sheet

Merck Veterinary Manual: Management of zoo animals Zoo, university or veterinaryThe Merck Veterinary Manual: a standard veterinary reference written and reviewed by veterinary specialists.
Chicago Exotics/Jenifer Nix: Blue Death Feigning Beetle Care Zoo, university or veterinaryAdded in the 2026 source-checked care-guide review.
GBIF Backbone Taxonomy (Global Biodiversity Information Facility) Peer-reviewed researchInternational scientific taxonomy used here for classification.
Wikipedia (species article) Community referenceFree encyclopedia; useful overviews with their own citations. Intro text is quoted under CC BY-SA 4.0.
iNaturalist (captive observations) Community referenceCommunity observation platform run by the California Academy of Sciences and National Geographic; observations marked captive show animals living in homes, zoos and aquariums.