Sand-Dwelling Caddis vs Western Grannom Caddis
Side-by-side species comparison
| Attribute | Sand-Dwelling Caddis | Western Grannom Caddis |
|---|---|---|
| Scientific Name | Molanna angustata | Brachycentrus occidentalis |
| Order | Trichoptera | Trichoptera |
| Family | Molannidae | Brachycentridae |
| Size | 10-14 mm | 9-12 mm |
| Habitat | Ponds & Lakes | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | Europe, Northern Asia | Europe |
| Conservation | Least Concern | Least Concern |
Sand-Dwelling Caddis
A caddisfly whose larvae build flattened shield-shaped cases from sand grains. The wide case acts like a snowshoe, preventing the larva from sinking in soft sediment.
Did You Know?
Its case has lateral flanges that distribute weight and prevent sinking into soft sand.
Western Grannom Caddis
A widespread European caddisfly forming mass emergences in spring on alkaline rivers. Larvae build four-sided tapering cases and filter-feed in riffles.
Did You Know?
Spring Grannom hatches on English chalk streams can darken the sky with millions of emerging adults.