Bornean Flat Stag Beetle vs Western Boxelder Bug
Side-by-side species comparison
| Attribute | Bornean Flat Stag Beetle | Western Boxelder Bug |
|---|---|---|
| Scientific Name | Aegus chelifer | Boisea rubrolineata |
| Order | Coleoptera | Hemiptera |
| Family | Lucanidae | Rhopalidae |
| Size | 20-45 mm | 11-14 mm |
| Habitat | Woodlands | Woodlands |
| Diet | Wood Feeders | Seed Feeders |
| Regions | Southeast Asia (Borneo, Peninsular Malaysia, Sumatra, Indonesia) | Western North America |
| Conservation | Least Concern | Least Concern |
Bornean Flat Stag Beetle
A medium-sized, very flat stag beetle with a glossy dark reddish-brown body perfectly adapted for living in thin spaces under bark. The mandibles are short but wide and strongly toothed.
Did You Know?
Its body is so flat that it can fit into gaps as thin as a few millimeters, making it nearly impossible for predators to extract.
Western Boxelder Bug
A red and black bug very similar to the eastern boxelder bug but found in western North America. It forms large overwintering aggregations on buildings and fences near boxelder trees. It is a nuisance pest but causes no structural damage.
Did You Know?
When crushed, it stains fabrics and surfaces with a reddish-orange dye from its body fluids, which is why it should be vacuumed rather than squashed when found indoors.