▶ Dynastes grantii

L2 - L3 larvae are individually packed in 5.5 oz cups.

Parent body length: Male 60-86mm / Female over 40-56mm
Incubation period of eggs: Approximately 1-6 months
Substrate use for laying eggs: LB Flake Soil
Hatching rate of the eggs: 40-65%
Substrate use for larvae: LB Flake Soil 
Amount of flake soil used per larva: 8.4L (2.2 gallons)
Larval period:  10-14 months.
Pupal period: 30-45 days
Inactive periods: 25-40 days
Maturity period: 20-30 days after inactive periods 
(It depends on the individual and its size, the larger they are, the longer it takes)
Life span of adult: 4-6 months (can live longer if not paired)

💬 Generally, the final weight of grantii male larvae is around 35–50 g,
The latest CB Guinness record is 89.4 mm

🪵 Western Hercules Beetle - Dynastes grantii

■ Species Overview

The Dynastes grantii, commonly known as the Western Hercules Beetle, is one of North America’s most iconic rhinoceros beetles. Native to the southwestern United States and northern Mexico, this species is admired for its impressive horns, large size, and smooth olive-green to gray elytra marked with natural black spotting. Among Dynastes species, grantii is especially valued for its hardy nature and elegant appearance.

■ Key Features

🔥 Iconic Hercules Beetle – A true New World giant beetle with a powerful and unmistakable horned silhouette.
🔥 Impressive Size & Presence – Males develop long cephalic and thoracic horns used in rival battles.
🔥 Unique Coloration – Elytra often display pale green, gray, or olive tones with beautiful natural patterning.
🔥 Collector Favorite – A highly respected species among Dynastes enthusiasts and exotic beetle keepers.
🔥 Recommended For – Collectors and breeders seeking a large, hardy, and visually striking rhinoceros beetle.

■ Care Information

📌 Temperature: 20–26°C (68–79°F)
📌 Humidity: Moderate humidity with good ventilation, avoid excessive moisture.
📌 Adult Diet: Beetle jelly, ripe fruits, or specialized insect nutrition products.
📌 Breeding Setup: Deep substrate with decayed hardwood material is recommended for egg-laying.
📌 Larval Growth: Performs well in nutritious fermented flake soil or premium Dynastes larval substrate.

■ Recommended Product Description

✅ Powerful & Majestic – Dynastes grantii.
Known for its elegant horns, large frame, and distinctive natural coloration.
A must-have species for rhinoceros beetle enthusiasts, breeders, and serious collectors.

🔎 Dynastes grantii Breeding Record

📢 Important — Please Read: Shipping and Refund Policy 

🚩 If you would like to pick up your package at USPS, 
Please write the following in the order note at shopping cart:
“Please hold for pickup at USPS.”
We will process your request and ship your order with a USPS Hold for Pickup label.
If the recipient’s area is below 60°F or above 85°F and they do not leave a ‘Hold for Pickup’ request, we will send a confirmation email. If we do not receive a response within 48 business hours, we will automatically ship the package using the Hold for Pickup service to maximize the survival rate of the live insects.