Moellenkamp's Stag Beetle vs Milkweed Bug

Side-by-side species comparison

Attribute Moellenkamp's Stag Beetle Milkweed Bug
Scientific Name Dorcus titanus Oncopeltus fasciatus
Order Coleoptera Hemiptera
Family Lucanidae Lygaeidae
Size 30-110 mm 10-13 mm
Habitat Grasslands Grasslands
Diet Sap Feeders Seed Feeders
Regions Japan, Indonesia, Philippines, India North America, Central America
Conservation Not Evaluated Least Concern

Moellenkamp's Stag Beetle

One of the most widely kept stag beetles in Asia, with powerful broad mandibles. Males show extreme size variation depending on larval nutrition.

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Did You Know?

The largest males can exceed 110 mm, making this one of the biggest stag beetles in the world.

Milkweed Bug

A medium-sized bug with bold orange-red and black warning coloration. It feeds on milkweed seeds and sequesters toxic cardiac glycosides for its own defense.

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Did You Know?

This bug has become a widely used laboratory model organism because it is easy to rear, has no diapause requirement, and displays clear warning coloration.