Of the eight most frequently collected spiders at a northern Utah study site, each of two species employed one of the following hunting strategies: pursuing, web building, jumping, and ambushing. Within each pair, size differences between species were substantial for all but the ambushers. The ambushers had different seasonal activity patterns, as did the web builders.
Robinson, James V.
"Size and seasonal activity patterns of abundant sympatric spider species in Cache County, Utah,"
Great Basin Naturalist: Vol. 44
, Article 9.
Available at: http://scholarsarchive.byu.edu/gbn/vol44/iss1/9