Violet Longhorn vs Hemlock Woolly Adelgid
Side-by-side species comparison
| Attribute | Violet Longhorn | Hemlock Woolly Adelgid |
|---|---|---|
| Scientific Name | Callidium violaceum | Adelges tsugae |
| Order | Coleoptera | Hemiptera |
| Family | Cerambycidae | Adelgidae |
| Size | 8-16 mm | 0.8-1.5 mm |
| Habitat | Forests | Forests |
| Diet | Wood Feeders | Sap Feeders |
| Regions | Europe, North America, Siberia | Asia, North America |
| Conservation | Least Concern | Not Evaluated |
Violet Longhorn
A compact, flat cerambycid with a striking metallic violet coloration across its entire body. Widespread in conifer forests of the Northern Hemisphere, it breeds in dry dead conifer wood. Adults are occasionally found in houses after emerging from firewood.
Did You Know?
Larvae can survive in kiln-dried timber and have emerged from furniture and log cabin walls years after construction.
Hemlock Woolly Adelgid
A devastating invasive pest of eastern hemlock in North America, originally from East Asia. It feeds at the base of needles, killing branches and eventually the tree.
Did You Know?
It has killed millions of hemlocks from Georgia to Maine since its detection in the 1950s.