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en.wikipedia.org/wiki/Woodlouse

A woodlouse (plural woodlice) is a terrestrial isopod crustacean with a rigid, segmented, long ... Woodlice in the genus Armadillidium and in the family Armadillidae can roll up ... such as under rocks and logs, although one species, Hemilepistus reaumuri, inhabits "the driest habitat conquered by any species of crustacean".

www.cs.mcgill.ca/~rwest/link-suggestion/wpcd_2008-09_augmented/wp/w/Woodlouse.htm

Woodlice in the genus Armadillidium can roll up into an almost perfect sphere ... Woodlice need moisture because they breathe through gills, called pseudo trachea, and so are usually found in damp, dark places, such as under rocks and logs.

en.wikibooks.org/wiki/Wikijunior:Bugs/Woodlouse

Woodlice are known by many names including pill bug, armadillo bug, potato bug, and roly-poly. ... Many species can roll up into a small ball the size of a pill ( that's why they're ... Woodlice need moisture because they breathe through gills. This is why they are often found in damp, dark places, like under rocks and logs.

www.answers.com/Q/Why_do_Woodlice_live_under_rocks_and_logs

By living under rocks and logs, woodlice stay out of the sun and in more humid ... Woodlice have adapted to living on land, but can also survive in moist places.

www-personal.umich.edu/~josephwb/Archived_Sites/Biol162/Notes/Woodlice.pdf

Jun 25, 2003 ... will find lots of information on their history, predators, physiology, behaviour, reproduction, colour ... species tend to spend most of their life under logs, stones, bark, decaying ... the ability to survive out of water for longer periods. ... on the seashore, living amongst crevices in the rocks and under rotting ...

www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/isopoda-pillbugs-slaters-and-woodlice

In addition to using this source of oxygen, terrestrial isopods breathe by diffusion of gas ... Among the terrestrial isopods, rock slaters of the family Ligiidae, inhabit littoral (seashore) areas. ... By spending a good deal of time hidden in or under logs and leaf litter, .... The common pill woodlouse can conglobate (roll into a ball ).

edis.ifas.ufl.edu/in1099

Aug 10, 2015 ... The name woodlouse is used for both pillbugs and sowbugs in ... but they differ in that a pillbug can roll into a ball and a sowbug cannot. ... During the day they can be found in dark, humid places such as under fallen leaves, rocks, or logs. ... While in the marsupium, both the eggs and the young survive on ...

infinitespider.com/the-secret-life-of-pill-bugs

Nov 10, 2013 ... This is why you find them under leaves, rocks, and logs. ... and closely related to crabs and crayfish, they breathe through gills on the underside of their bodies. ... Pill bugs can roll up to protect themselves but sow bugs can't. ... pill bug, pillbug, roly poly, Woodlouse on November 10, 2013 by Infinite Spider.

www.uky.edu/Ag/CritterFiles/casefile/relatives/sowbugs/sowbug.htm

Apr 21, 2008 ... Other Names: roly-polies, woodlice, pillbugs, isopods ... Sowbugs breathe through plate-like gills located on the underside of the ... is typically reserved for those isopods that can roll themselves into a ball for ... Sowbugs are very common in moist, cool conditions, and are often found under rocks and logs.

www.scientificamerican.com/article/springtime-science-whats-home-sweet-home-to-a-bug

Mar 20, 2014 ... You can often find sow bugs and pill bugs in damp, dark places, like the soil ... Sow bugs and pill bugs breathe with gills, so they need moisture for respiration. ... Sow bugs and pill bugs, both of which are also called wood lice, ... found locally by looking under rocks, garden plants, rotting logs and leaf litter.