Mammoth Cave Beetle vs Small Amber Spinner
Side-by-side species comparison
| Attribute | Mammoth Cave Beetle | Small Amber Spinner |
|---|---|---|
| Scientific Name | Xenotrechus condei | Caenis macrura |
| Order | Coleoptera | Ephemeroptera |
| Family | Carabidae | Caenidae |
| Size | 5-7 mm | 3-5 mm |
| Habitat | Caves | Ponds & Lakes |
| Diet | Omnivores | Omnivores |
| Regions | United States | Europe |
| Conservation | Endangered | Least Concern |
Mammoth Cave Beetle
A rare troglobitic ground beetle known from caves in the Ozark region of Missouri. It is eyeless with greatly elongated appendages.
Did You Know?
It was not discovered until 1987, despite extensive surveys of Missouri caves.
Small Amber Spinner
A tiny mayfly whose amber-colored spinners fall to the water in dense clouds. Nymphs live among fine sediments in slow-flowing water.
Did You Know?
Spinner falls can be so dense they coat the water surface like a film, triggering frenzied fish feeding.