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Site location map. Click to enlarge. |
With rain likely on the west side of the Cascades, Rod Crawford and I headed across Snoqualmie Pass to (hopefully) drier weather and my favorite microhabitat, ponderosa cones!
We centered our collecting around the former mining town of Liberty. Our first site was Liberty Meadow, located just west of town. From there we headed a few miles north up Lion Gulch into a lovely ponderosa pine (
Pinus ponderosa) forest about 700 feet higher in elevation.
Liberty Meadow
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Isolated ponderosas in Liberty Meadow |
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Lots of cones! |
Liberty Meadow features a number of isolated ponderosas, so I decided to tap 50 cones dropped by one tree. What I found in them was a surprise: almost every spider I tapped appeared to be of the same species, and one I didn't recognize. But they sure were beautiful.
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Juvenile Steatoda, 1 of 14! |
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Oxyopes scalaris from pine foliage |
I wondered whether this was a fluke, and so decided to tap another 50 cones that had fallen from a different isolated ponderosa. The result was the same! In all, I collected 18 spiders from 100 tapped cones, 14 of them being what turned out to be a
Steatoda (Theridiidae). Although the palps on many of them looked well-defined to the naked eye, they turned out to be penultimate males and so we couldn't identify the species. Drat!
UPDATE (2 July 2016): We returned a few weeks later and collected mature specimens, identified as
Steatoda washona.
Read more about it here!
Rod had exhausted the habitats he was interested in by the time I was done tapping those 100 cones and beating the pine trees' foliage, so we drove on to our site up Lion Gulch.
Lion Gulch
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Looking down at cone tapping site
(near car) from nearby hillside |
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Tiger lily (Lilium columbianum) |
The lupines and lillies growing between the ponderosas on the gulch slopes were at their peak, a lovely sight. We parked at a campsite just off the road and I began tapping a set of 50 ponderosa cones.
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Fallen ponderosa cones in Lion Gulch |
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Female Gnaphosa muscorum w/egg
sac found under hillside rock |
I collected 9 spiders from 5 families. Three species were identifiable: the theridiids
Dipoena lana and
Euryopis formosa, and the gnaphosid
Poecilochroa montana. None of the
Steatoda from the meadow, however. This was only the second time I've tapped
D. lana from cones, but
P. montana is no stranger to them and of course
I find E. formosa in cones at about half of eastern Washington sample sites.
You can read Rod's trip narrative
here and view his photo album
here!
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Chipmunk licking the sandstone monolith on a nearby hilltop |
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