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Site location map. Click to enlarge.
Key: Blue - Ozyptila praticola confirmed, Yellow - O. praticola suspected,
Red - No O. praticola found |
Yesterday I returned to my search for the introduced crab spider
Ozyptila praticola (Thomisidae). Since I've already found it in two places in the Snoqualmie River valley (
Snoqualmie and
Duvall), I wanted to continue my search into the foothills of the Cascades mountains east of the river valley.
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Maybe not the best place to collect spiders... |
My focal point was the Tolt Reservoir. On a mountain biking website I had found a detailed description of a circular route to near that point which started in Tokul and ended near Duvall. What a windfall! Or so it seemed until I tried driving it. Not too far beyond Tokul, the roads were gated and posted with warning signs about written permission being required before entering. This approach being unavailable, I decided to try driving the final segment of the route "backwards" from Duvall. Whether that approach is open to the public I still don't know, since road names on the signs and in the instructions didn't always match up, and I didn't have all the maps with me that I thought I had. It was one of those days... I'll have to return another time better prepared.
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Cone source, a lone pine |
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A fallen cone |
But the day wasn't a total loss since I was able to find cones to tap in Carnation and confirm that
O. praticola is present at the midpoint of the Snoqualmie River valley. The cone source was a black pine (
Pinus nigra) growing on a street corner in the business district. Its fallen cones were on a bed of pine needles through which sparse herbs were growing. Tapping 50 cones I collected 18 spiders, 10 of them
O. praticola. Other spiders present in these cones included a
Diplostyla (Linyphiidae) female and penultmiate male, a pair of mature
Tenuiphantes tenuis (Linyphiidae) and two juvenile
Clubiona (Clubionidae). The cones also contained 25 harvestmen and a number of tiny snails.
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A wall of corn marks the edge of town in Carnation |
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