Excellent night flight, and as i write this it is still at full tilt.
Only new migrant reported that i saw listed was Purple Martin on the southern Oregon coast.
But tonight is one of those teachable moments on the interaction of the weather and migration. So we’ll look at the conditions at 850 mb heights — note the stream lines and the ridge in the west and the trough in the east. Then check out the static image of the national radar composite. (The full loop can be viewed over at Paul’s archive: here)
The Pacific Flyway from the Mexican border to the Canadian border is solid blue with birds. Everywhere else? Central and Mississippi Flyways — nada. Atlantic Flyway? — just a tiny bit on the SE coast ahead of the advancing cold front.
Just a bit of narrative today as the radar images are a bit insipid.
Ospreys are back in force and already rebuilding their nesting platforms. Rufus Hummingbirds are staking out territories. Northern Rough-winged Swallows and Barn Swallows are being reported to the south of us. Great Blue Heron rookeries look to be ready for egg laying.
Looks like the Tundra Swans have left. I only saw one the whole weekend. Duck numbers are down, as are Golden-crowned and Fox Sparrow numbers. I had two Fox Sparrows in song this weekend.
A few more Violet-green Swallows but that is about it for now. We are still seeing a pretty solid movement of winter residents. Again, i think these are all waterfowl with a small mix of the vanguard migrants.
Down in the San Diego area more House Wrens and the first Cassin’s Vireos now being reported.
The San Diego area is reporting the first Wilson’s Warblers and House Wrens and Western Kingbirds and Bullock’s Orioles have made it into the Central Valley.
I’ve been keeping an eye on the National radar as well over on Paul’s archive. I haven’t seen anything spectacular. It’s pretty much all low density movement much like we’ve been seeing here in the Pacific Northwest.
But, birds are still moving north and you can see them dodging the rain cells in last night’s radar capture.
Perhaps sensing the looming trough birds filled the airspace last night.
There isn’t any new migrant reports so this has to be staging waterfowl. I am still puzzled about the density of birds headed up the spine of the Cascades. Perhaps they use the Columbia Gorge to get to the east side?
Anyway, since it was a nice night to take wing and it looks like the next couple of days, maybe not so much, i put in all three PNW radar loops in today’s gallery. RTX is Scappoose, LGX is Gray’s Harbor, and ATX is Seattle.
The recent cloud cover and scattered showers have dampened, but not extinguished the movement northward.
Only reports of migrant movement of note in the PNW are the push of Rufous Hummingbirds, scattered Turkey Vultures, and a couple of early Ospreys.
I put both the Base Reflectivity and the Hydrometeor Classification (HC) returns from yesterday. With the HC it becomes easier to pick the birds out of the clouds. The BI (biological) returns are colored a brick red and really stand out.