Insect Encyclopedia: Popular Beetles & Stag Beetles — Features & Care Guide

Beetles (rhinoceros beetles and stag beetles) are popular insects loved across all age groups. From domestic species to large exotic varieties, here are their features and care essentials.

Popular Rhinoceros Beetle Species

Japanese Rhinoceros Beetle - **Size:** Males 30-80 mm (including horn) - **Temperature:** 20-28 degrees C - **Difficulty:** 1/5 (Very easy) - The iconic summer insect of Japan. Powerful horn is the main attraction - Larvae can be reared in leaf litter substrate available at home centers; ideal for beginners - Larval stage is approximately 10 months. Adults emerge in June-July - Adult lifespan is approximately 1-3 months

Hercules Beetle - **Size:** Males up to 180 mm (world's largest class) - **Temperature:** 20-25 degrees C - **Difficulty:** 3/5 (Moderate) - Overwhelmingly popular as the world's largest rhinoceros beetle - The long upper and lower horns create an impressive "scissor" grip - Larval stage is 1 to 1.5 years, requiring large containers - Humidity management is crucial; excessive dryness can cause horn deformity

Caucasus Beetle - **Size:** Males up to 130 mm - **Temperature:** 18-25 degrees C (prefers slightly cool) - **Difficulty:** 3/5 (Moderate) - Asia's largest rhinoceros beetle, featuring three horns - Extremely aggressive temperament; never house with other beetles - Particularly sensitive to high temperatures, making summer management critical

Popular Stag Beetle Species

Japanese Giant Stag Beetle (Dorcus hopei) - **Size:** Males 30-80 mm - **Temperature:** 18-28 degrees C - **Difficulty:** 2/5 (Easy) - The most popular Japanese stag beetle species - Using fungus bottles enables production of large specimens - Adults live 2-5 years---impressively long-lived - Shy temperament; provide bark or spawning wood for hiding

Saw Stag Beetle - **Size:** Males 25-75 mm - **Temperature:** 20-28 degrees C - **Difficulty:** 1/5 (Very easy) - Distinctive large curved mandibles make it especially popular for its striking appearance - Relatively easy to collect in the wild; gathers on oak and kunugi trees - Larvae thrive on fermented substrate alone - Adult lifespan is approximately 3-6 months

Rainbow Stag Beetle - **Size:** Males 35-65 mm - **Temperature:** 20-25 degrees C - **Difficulty:** 2/5 (Easy) - Hailed as the most beautiful stag beetle in the world for its iridescent shimmer - Native to Australia; hardy and easy to keep with proper temperature management - Larvae can be raised on either fungus bottles or substrate - Gentle temperament with moderate pinch strength, making them easy to handle

Basic Beetle-Keeping Equipment

Minimum supplies needed for beetle keeping:

For Adults: - Breeding case (medium to large) - Insect substrate (hardwood mat) - Insect jelly (primary food) - Perching wood and bark (prevents flipping) - Spray bottle (humidity management)

For Larvae: - Fermented substrate or fungus bottles - Rearing bottles (800-1400 cc) - Thermometer

Breeding Basics

For those attempting beetle breeding, here are the fundamentals:

1. Wait for maturity: Don't pair immediately after eclosion. Rhinoceros beetles need 1-2 weeks; stag beetles need 2-6 months of post-teneral feeding depending on species
2. Pairing: House male and female together for 1-2 weeks
3. Oviposition setup: Transfer the female to a case with oviposition substrate or spawning wood
4. Extraction: After 1-2 months, break down the substrate or spawning wood to collect larvae
5. Individual management: Rear larvae individually in separate bottles to prevent cannibalism

Find Insects on BuriChoku

BuriChoku lets you purchase meticulously raised specimens directly from beetle breeders. You can verify bloodline and parent size information, plus ask breeders directly about care methods. Find your perfect specimen and enjoy the world of beetle keeping.