Common Shiny Woodlouse

Oniscus asellus

''Oniscus asellus'', the common woodlouse, is one of the largest and most common species of woodlouse in the British Isles and Western and Northern Europe, growing to lengths of 16 mm and widths of 6 mm.
Oniscus asellus - Front half moulted Woodlice keep growing all their life, long after reaching sexual maturity, and (for that) keep on shedding their skin. They do so in two phases: Rear half and front half. This Oniscus asellus has just shedded the front half. Isopoda,Oniscidae,Oniscidea,Oniscus,Oniscus asellus,moulted,nl: Kelderpissebed,teneral


''Oniscus asellus'' is one of the largest native woodlice in Britain, at up to 16 mm long. It is relatively flat, and is a shiny grey in colour, although juveniles are rougher.

Pale patches are often visible on the back of ''Oniscus asellus''; these are areas that store calcium, which is then used to reinforce the exoskeleton after a moult. Moulting occurs in two halves, with the rear half moulting before the front half. The exuvia is often consumed by the animal after moulting.
Oniscus asellus Just adding the species for Schiermonnikoog ... Geotagged,Isopoda,Netherlands,Oniscidae,Oniscidea,Oniscus,Oniscus asellus,Schiermonnikoog,nl: Kelderpissebed


''Oniscus asellus'' is the most widespread species of woodlouse in the British Isles, both geographically and ecologically. It is not known from the Mediterranean Basin, but is widespread in Northern and Western Europe, as far east as the Ukraine, as well as in the Azores and Madeira; it has also been widely introduced in the Americas.
Common Woodlouse - Macro top view, Heeswijk-Dinther, Netherlands Opening a small macro set from a nearby forest. On this very hot day, I went out to try a new lighting setup:

I already had the ring flash units and added the Rogue foldable soft box. My main flash unit, a SB-910, flashes upwards into the soft box, and sends down diffuse light. Goal of this setup is to try and reduce hard flash shadows, but also to allow me to shoot f/11 - f/16 by day without it looking like a night shot. 

I saw a berch tree with some very loose bark, so I pulled it to find a few woodlice and ants inside. Oniscus asellus is a presumed species, I'll check it with an expert.
A second species of woodlouse found in the same place: Europe,Heeswijk-Dinther,Netherlands,Oniscus asellus,World


''Oniscus asellus'' occurs in a wide range of habitats, including some with little available calcium. It is chiefly found under stones, and on rotting wood. It is the only woodlouse regularly found on heather moors and blanket bogs, where it lives around items such as rotting fenceposts.


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SpeciesO. asellus