Nature School Game Contact Blog Project Noah Facebook Project Noah Twitter

A global citizen science platform
to discover, share and identify wildlife

Join Project Noah!
nature school apple icon

Nature School For Teachers - Fall 2020 Launch! visit nature school

Woodlouse Hunter

Dysdera erythrina


These spiders can be up to 2 cm long, Females are, on average, larger, 1.1 to 1.5 cm, while males are generally 0.9 to 1 cm. Both have a reddish-brown color. Their six eyes are close together, in an oval shape, with reddish legs, a pale abdomen, and a brown cephalothorax. The spider has 8 legs, 3 pairs(6) of legs facing forward and one pair(2) facing backwards.(Wikipedia)


Spotted in a survey monument casing. When I took the lid off it crawled out. The range is central and southern Europe to Northern Africa. (A fairly rare find here in Western Washington).


Dysdera are one of the few known arthropods to hunt and prey on woodlice, which is their main food source. Their wide jaws and large fangs help to overcome woodlice hard armor like shells, as well as their ability to release chemicals to keep them out of harm's way. These adaptations also enable them to prey on other common ground-dwelling invertebrates such as silverfish, earwigs, millipedes, and small burying beetles. Dysdera spiders' huge, sharp fangs make them very powerful predators for their size, allowing them to dominate, and sometimes kill, competitors such as centipedes and other spiders.(wikipedia)

Species ID Suggestions

Sign in to suggest organism ID


Kalen 5 months ago

i like spiders

maplemoth662 2 years ago

Your welcome, Brian38....

Brian38 2 years ago

Thank you Neil and maplemoth for your comments.

Neil Ross
Neil Ross 2 years ago

Wow! Despite it's size, it looks like such a formidable creature. Wonderful spotting, Brian. Great pics and notes too.

maplemoth662 2 years ago

Three, very pretty photos....

Spotted by

Washington, USA

Spotted on Apr 6, 2018
Submitted on Apr 7, 2018

Related Spottings

Kleiner Asseljäger Woodlouse Hunter Woodlouse Hunter Woodlouse Spider

Nearby Spottings

Bold Jumper Evergreen candytuft Bewick's wren Rattlesnake plantin
Noah Guardians
Noah Sponsors