Map the Spider

Help build a range map for Philadelphia's purse-web spiders (Mygalomorphae, Atypidae)

≈ 100 Entries

Last on:
14 Jan 2022

HAVE YOU SEEN THIS SPIDER WEB? Purse-web spiders build a silken tube attached to trees and shrubs and stems. They live a secret life because the webs are well camouflaged and the spiders rarely leave their tubes (wandering males being the exception). Purse-webs are very durable and can be found at any time of the year where they are present. In the U.S. one species, Atypus snetsingeri is known only from southeastern PA, USA, near Philadelphia. It makes vertical tubes on trees, in hedges and on buildings. The "Map The Spider" project is asking citizen observers in and near Philadelphia (including Delaware & New Jersey) to look for purse-webs when they are outdoors, and to report where they looked and if they found them. Help us make a definitive map for purse-web spiders. Visit the project website for more details (

The Epicollect5 application helps you report where you searched and for how long, and whether or not you found any purse-webs (both kinds of data are important!).

Spiders are cool, but purse-web spiders are *very* cool. See if you can find the spider in your neighborhood!