29 April 2016 – PNW Migration Update

Last night was another night of moderate migration, just like yesterday.  A high pressure system is pushing in from the south and the winds at the head of the ridge are out of the west.  Crosswinds are not too much of a problem but certainly no incentive.

Heard around the listserves, Olive-sided Flycatcher, Hammond’s Flycatcher, Dusky Flycatcher, Pacific-slope Flycatcher, Western Tanager, Bullock’s Oriole; all being reported in the region.  Even a Lazuli Bunting report.

HERE’S a great read on PNW migration.  Put into perspective with migrations in other N American Regions, by luminary David Irons.

One of the things he brings up is a pet peeve of mine; the use of the term “fallout” in the Pacific Northwest.  There is no such thing here.  There may be a temporary bunching up of migrants in certain weather conditions where you might get to see 50 Yellow-rumps instead of 25.  That, folks is not a “fallout”  THIS is a “fallout”.

I miss John Stewart, sorry Trevor, you don’t cut it.  So, “Here it is, your moment of zen:”


19-20 March 2016 PNW Migration Update

Really nice movement over this weekend.

In San Diego:
More Pacific-slope Flycatcher, Bullock’s Orioles and Wilson’s Warblers.

Central Valley:
Black-throated Gray Warbler

Willamette Valey:
Orange-crowned Warblers, and a solid push of Violet-green Swallows.

I’m having problems uploading the loop from last night — i’ll try later.

18 March 2016 – PNW Migration Update

Well, it would appear waterfowl are on the move.

Looking at last night’s radar we can see low level migration but with 20+ dBZ patches coming from the Counties of Benton/Polk/Marion and Multnomah/Clark (WA).  Which are home to Finley/Basket Slough/Ankeney (FBA) NWR, and Sauvie Island WMA/Ridgefield NWR.  Note how the birds that take off from FBA split.  Some head to the coast and some head up the valley.  Curious.  There is also a slug of migrants heading up the western slopes of the Cascades.  Again, curious.

It’s a very interesting radar image today, but exactly what is going on is all speculation.  Tomorrow we’ll take a look at Paul’s national radar composite.

In the Region: Rufus Humming Birds are now being reported and a Loggerhead Shrike was reported on the east side of the Cascades.

South: Swainson’s Hawks have made it to the Central Valley and a Bullock’s Oriole has also been reported there.