Woolly Alder Sawfly vs Mitchell's Diurnal Cockroach
Side-by-side species comparison
| Attribute | Woolly Alder Sawfly | Mitchell's Diurnal Cockroach |
|---|---|---|
| Scientific Name | Eriocampa ovata | Polyzosteria mitchelli |
| Order | Hymenoptera | Blattodea |
| Family | Tenthredinidae | Blattidae |
| Size | 5-7 mm | 30-40 mm |
| Habitat | Rivers & Streams | Deserts & Drylands |
| Diet | Herbivores | Herbivores |
| Regions | Europe, introduced to North America | Australia |
| Conservation | Least Concern | Least Concern |
Woolly Alder Sawfly
A small, dark sawfly whose larvae are covered in a white, woolly, waxy secretion. The larvae feed on the underside of alder leaves.
Did You Know?
The white waxy covering on the larva closely resembles woolly aphids, a possible case of defensive mimicry.
Mitchell's Diurnal Cockroach
A large, flightless cockroach with a shiny dark blue-black body found in arid Australia. Unlike most cockroaches, it is active during the day.
Did You Know?
Its bold daytime activity is thought to be possible because its dark, hard body deters predators.