Coordinates approximate. Found under a rock by a trail. There were also many juveniles throughout the park in the grasses and in rock crevices.
Found under rock with egg sac.
Part of a field study of Latrodectus hesperus, Argiope trifasciata, and two species of Agelenopsis during 1999-2003. Hundreds were observed separately in vegetation or mammal burrows.
Hiding in my irrigation valve box
Male, seen in the web with at least one other male and a female
Inside a hole on a dry coulee slope.
Brought to me by a former student who works at a restaurant in downtown Edmonton that shall remain nameless. Colour pattern seems consistent with the western black widow, but Edmonton seems a bit far north, and dispersal via a shipment of fresh fruit or vegetables from further south seems possible, even likely. Body length is about 5-6mm (excluding legs), which I believe makes her a juvenile.