Nosy Pill Woodlouse Armadillidium nasatum

Photo of Nosy Pill Woodlouse (Armadillidium nasatum)

(c) Ana Ka'ahanui, some rights reserved (CC BY)

OrderIsopods (Isopoda)
FamilyPill Woodlice (Armadillidiidae)
GenusPillbugs (Armadillidium)

The scientific name "nasatum" literally refers to its prominent snout-like features, and calling it the "nosy" pill woodlouse is perfectly apt—this large Western European woodlouse really does have a distinctly comical nose-forward appearance. Despite its funny looks, it's proven such an effective traveller that it has become established in North America, where it coexists with its cousin Armadillidium vulgare. Both species arrived accidentally via human trade and commerce, stowaways in shipments and garden soil exported from Europe. Large for a woodlouse, it's easy to spot once you know what you're looking for, especially in the right damp conditions where it thrives. The "nosy" name isn't just whimsy—it's actually based on the creature's anatomy, proving that form truly does follow function. You might find it in gardens or cellars on both sides of the Atlantic now.

Think you can identify this one in the wild?

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