|Site location map. Click to enlarge.|
1. Cottage Lake
|Black pines behind the Safeway |
in Cottage Lake
|Fallen cone microhabitat|
behind the Safeway
|Male Bassaniana utahensis|
2. Duvall Park & Ride
|Western white pines flanked this |
building next to the Park & Ride
|Some very productive cones were|
hiding under this hedge!
At first it didn't look like I'd be able to find a full sample of 50 cones to tap, but the more I searched, the more cones I found. One of the most productive caches was underneath a hedge growing curbside in front of the business. The cones were lying on a wide variety of substrates, including pavement, soil, uncut grass, and plant litter beneath the hedge. I tapped 64 cones and collected 32 spiders, well above twice the average density!
Clocking in at 14 juveniles, Enoplognatha probably-ovata (Theridiidae) was the most common morphospecies present. Ozyptila praticola took second place, with 7 juveniles, followed by Phrurotimpus sp. (Phrurolithidae) with 4. I also collected a very teneral Lepthyphantes male which I haven't identified yet. But the most esoteric specimens in the sample were two juvenile Tibellus sp. (Philodromidae)! This is one of the most common spiders found around here...on tall grass. Not surprisingly, these came from the cones I found laying in tall, unmowed grass.
Clearly I have not yet found the eastern extent of O. praticola's local range. The search will continue eastward into the Cascades lowlands!
|View of the Snoqualmie River from the Duvall bridge|