Blue Doctor Butterfly vs Klamath Weed Beetle
Side-by-side species comparison
| Attribute | Blue Doctor Butterfly | Klamath Weed Beetle |
|---|---|---|
| Scientific Name | Rhetus periander | Chrysolina quadrigemina |
| Order | Lepidoptera | Coleoptera |
| Family | Riodinidae | Chrysomelidae |
| Size | 55-65 mm wingspan | 5-7 mm |
| Habitat | Rivers & Streams | Grasslands |
| Diet | Herbivores | Herbivores |
| Regions | South America (Brazil, Peru, Colombia, Ecuador, Venezuela, Bolivia) | Europe (native), introduced to North America, Australia |
| Conservation | Least Concern | Least Concern |
Blue Doctor Butterfly
A large metalmark butterfly with brilliant metallic blue upperwings and distinctive red-spotted underwings with long tail streamers. It is one of the largest and most spectacular members of the family Riodinidae. Males are territorial and frequently seen perching on sunlit leaves.
Did You Know?
Despite being a metalmark butterfly rather than a swallowtail, it has evolved long tail streamers on its hindwings through convergent evolution.
Klamath Weed Beetle
A dark bronze to coppery-brown beetle with a convex, heavily punctured body. It was introduced to control the invasive Klamath weed (St. John's wort) and became a classic biocontrol success story.
Did You Know?
Its introduction to California in the 1940s reduced Klamath weed infestations by over 99%, saving millions of acres of rangeland.