Grannom
The grannom is a caddisfly, a small moth-like insect with hairy wings. Its babies grow up underwater in rivers and streams. Like many caddisfly larvae, they build little protective cases out of silk.
How fast is it?
Fun facts
Caddisflies are cousins of moths and butterflies, but they have hairs on their wings instead of scales.
Caddisfly larvae glue sand, tiny stones or bits of plants onto their silk cases to make them stronger.
Caddisflies only live in clean water, so finding them shows that a river is healthy.
People who fish make pretend caddisflies out of feathers and thread to catch trout.
One artist gave caddisfly larvae gold and gems, and they built sparkly jewel cases.
Most asked questions about Grannom
?What is a grannom?
It is a kind of caddisfly, a small insect whose young live in rivers and whose adults fly.
?Does the grannom bite?
No. It is completely harmless.
?Where do grannom larvae live?
Underwater in rivers and streams, inside little cases they make themselves.
For bug experts
- Scientific name
- Brachycentrus subnubilus
- Group
- Other insects
- Family
- Brachycentridae
- Classification
- Insecta > Trichoptera > Brachycentridae
- Lives on
- Europe
Where the facts come from
- Caddisfly (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
- Picture by Bruce Marlin. CC BY-SA 2.5, Wikimedia Commons. The round sticker of this bug is cut from the same picture.
If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.
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