Black Headed Birch Sawfly vs Golden Pergid Sawfly
Side-by-side species comparison
| Attribute | Black Headed Birch Sawfly | Golden Pergid Sawfly |
|---|---|---|
| Scientific Name | Craesus alniastri | Perga gravenhorstii |
| Order | Hymenoptera | Hymenoptera |
| Family | Tenthredinidae | Pergidae |
| Size | 7-9 mm | 14-22 mm |
| Habitat | Woodlands | Woodlands |
| Diet | Herbivores | Herbivores |
| Regions | Europe | Australia |
| Conservation | Least Concern | Least Concern |
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.
Golden Pergid Sawfly
A large Australian sawfly with distinctive golden-orange coloring and dark wing venation. Larvae are gregarious spitfires on eucalyptus.
Did You Know?
Female Perga sawflies show an unusual degree of parental care, standing guard over their egg masses for days to protect them from parasitoids.