Posts Tagged ‘Grassy Glade’

Another New Milkweed and Monarch Site!

After all the great luck we’d been having finding purple milkweed in the Rigdon area of southeastern Lane County, I was determined to find some more sites. With the exception of Grassy Glade, all the other sites were on the north side of Rigdon Road 21 and the Middle Fork of the Willamette. Surely there must be some other areas on the south side. I spent some time on Google Earth, looking for all the openings I could find between Big Pine Opening and Grassy Glade that appeared to be meadows between 2400–3600′, similar to those we had been surveying. I found at least a half dozen or so promising spots, but one in particular seemed like a good place to start.

Milkweed, buckwheat, and rabbitbrush growing in “Maple Creek Meadow”. Diamond Peak can be seen to the east. The ridge in the backround was burned in the 2009 Tumblebug Fire.

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Farther Up “Milkweed Ridge”

Like many openings in the area, the southernmost one in the complex had Oregon white oaks (Quercus garryana) being crowded out by ponderosa pines (Pinus ponderosa) and other conifers. Enhancing oak habitat has been the main focus of restoration in the area. Hopefully now improving the area for milkweed and monarchs will also be a priority.

Having found purple milkweed (Asclepias cordifolia) and monarchs at Monarch Meadow (see Hidden Meadow Reveals a Thrilling Secret) and at the meadow complex north of there (see A Week of Monarchs and Milkweed: Day 1), the next logical place to check was another complex of openings even farther up the ridge. On July 5, Joe Doerr and I headed up there to investigate. These openings also follow the old road that the middle complex is along, so we felt particularly confident we would find more milkweed. We decided to drive in from the north on an old but (barely) driveable road. I had been on that road several times years ago, to access what Sabine and I call “Gateway Rock Ridge” (see First Outing of the New Year for the most recent trip), but I can’t imagine doing it now. The tire tracks seemed to be sinking down and lots of vegetation was reaching out into the road from the surrounding forest. Thank goodness we were in a Forest Service rig!

Unfortunately, mortality is very high for these tiny monarch caterpillars. Most get picked off by wasps and other predators when they are quite small.

We parked at the top of the old road and saw ground rose (Rosa spithamea) in bloom right by the car. From there we walked south. Before long we came to the first opening, lying right along the ridge. Sticky birdbeak (Cordylanthus tenuis) grew abundantly here along with western rayless fleabane (Erigeron inornatus). These normally uncommon species have been showing up at most of the other milkweed sites, so it was a good sign. There had also evidently been a great display of showy tarweed (Madia elegans), but it was already shriveling up in the heat of the day. We didn’t spot any milkweed at first, but then we started to see it scattered about in several openings. We found monarch caterpillars and eggs as well. Mission accomplished! We walked as far down the road as the uppermost meadow of the middle complex that we’d both already been to on separate trips. So now we knew the area all along the old road and started back toward the car. Read the rest of this entry »

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