Cobalt Milkweed Beetle vs Black Headed Birch Sawfly
Side-by-side species comparison
| Attribute | Cobalt Milkweed Beetle | Black Headed Birch Sawfly |
|---|---|---|
| Scientific Name | Chrysochus cobaltinus auratus | Craesus alniastri |
| Order | Coleoptera | Hymenoptera |
| Family | Chrysomelidae | Tenthredinidae |
| Size | 8-11mm | 7-9 mm |
| Habitat | Meadows | Woodlands |
| Diet | Herbivores | Herbivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Cobalt Milkweed Beetle
A subspecies of the cobalt blue milkweed beetle with slightly more golden-green coloring.
Did You Know?
The metallic blue and green coloring warns predators that it has sequestered toxic compounds from milkweed.
Black Headed Birch Sawfly
A medium-sized sawfly with a dark head and orange body. Larvae are greenish-blue with black heads and feed communally on birch and alder leaves.
Did You Know?
When a predator approaches, the entire colony of larvae simultaneously rears up and thrashes, making the group appear larger and more threatening.