Western Grannom Caddis vs Firebrat
Side-by-side species comparison
| Attribute | Western Grannom Caddis | Firebrat |
|---|---|---|
| Scientific Name | Brachycentrus occidentalis | Thermobia domestica |
| Order | Trichoptera | Blattodea |
| Family | Brachycentridae | Lepismatidae |
| Size | 9-12 mm | 10-15 mm |
| Habitat | Rivers & Streams | Indoors |
| Diet | Omnivores | Omnivores |
| Regions | Europe | Worldwide |
| Conservation | Least Concern | Least Concern |
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.
Firebrat
A heat-loving relative of the silverfish that thrives at temperatures of 37-39C. Found near furnaces, boilers, and bakeries. One of the most thermophilic household insects.
Did You Know?
Firebrats seek out the hottest spots in buildings — they have been found living happily inside commercial bread ovens and next to industrial furnaces at nearly 40C.