Black Headed Birch Sawfly vs Oregon Oak Gall Wasp
Side-by-side species comparison
| Attribute | Black Headed Birch Sawfly | Oregon Oak Gall Wasp |
|---|---|---|
| Scientific Name | Craesus alniastri | Besbicus mirabilis |
| Order | Hymenoptera | Hymenoptera |
| Family | Tenthredinidae | Cynipidae |
| Size | 7-9 mm | 2–3 mm |
| Habitat | Woodlands | Grasslands |
| Diet | Herbivores | Gall Makers |
| Regions | Europe | Western North America |
| Conservation | Least Concern | Not Evaluated |
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.
Oregon Oak Gall Wasp
A gall wasp that induces conspicuous galls on Oregon white oak in western North America. Galls form on leaf veins and can be quite abundant.
Did You Know?
Native Americans used some oak galls medicinally as an astringent to treat mouth sores and skin wounds.