moremoth's picture

Dock Bug.

Observed: 26th May 2012 By: moremothmoremoth’s reputation in Invertebratesmoremoth’s reputation in Invertebratesmoremoth’s reputation in Invertebratesmoremoth’s reputation in Invertebratesmoremoth’s reputation in Invertebrates
Dock Bug.
Description:

Bug, one of many, crawling over a dock leaf. When disturbed it shows off an orange flash under its wings.

Identifications
Species interactions

No interactions present.

Species with which Dock Bug (Coreus marginatus) interacts

Comments

Nick Upton's picture

orange flash

An interesting observation - I'd not noticed this before. They usually seem to play the camouflage game and wobble side to side like a dead leaf. They are said to emit nasty smells if handled (like stink bugs) but are known to be highly edible to birds, so it must be a last resort attempt to con predators that they're nasty to eat. They make quite a buzz when they fly as well, which may add to the startle factor! I was startled when one flew past my ear recently, anyway! Sounded like a big beetle..

Nick Upton, naturalist and photographer.

moremoth's picture

Orange flash

We were able to repeat this apparent warning behaviour. I handled one a few days ago without any stinks, so perhaps you need to tumble them about a bit to make them get smelly.

Bill Welch

Nick Upton's picture

Smelly

I'll experiment gently next time I find one!

Nick Upton, naturalist and photographer.