The slowing of migration continues. In fact it is barely noticeable in the Portland area. So we’ll take a look at the ATX (Seattle) radar where the migration returns are more pronounced, especially across the Strait.
Another low density night. Two in a row signals the waning of the season. There’s still plenty of ducks to show up but they might just trickle in.
A weather system is headed in from the Gulf of Alaska. Adventurous birders could scour the coast for oddball Asian vagrants. Not my cup of tea but, just saying…
MIA end of last week because the rain obscured any migrant returns, if any.
Last night we begin to see the waning of the season. Fairly light across the Metro Region. Most decent returns are along the western flanks of the Cascades.
Ducks are coming out of eclipse plumage. Ruby-crowned Kinglet numbers are up as are the wintering sparrow numbers. Pine Siskins are invading coastal counties. And a first report of a Rough-legged Hawk, also on the coast.
The Snow Geese are back on Sauvie Island.
RTX is on line but it is still a bit wonky
There was a dramatic drop off in migration last night. It could be the winds out of the SE but i don’t think so. Maybe just pulse beat in wave movement.
RTX is back on line … for now:
NOUS66 KPQR 070250
Message Date: Oct 07 2017 02:56:19
Dopper Radar KRTX, serving SW Washington and NW Oregon was returned to service s
everal hours ago. So far, so good.
It was a spectacular flight last night! Solid returns across the region. Highlight was the coastal flight returns. We don’t get to see these often and are the result of high flying migrants.
I didn’t get into the field much this weekend, just a walk down Rentenaar Rd on Sauvie Island, so i don’t have any ground reports of note. Hunting season starts next weekend on ODFW Wildlife Management Areas – Saturday 14 October. There’s not much water in the seasonal units like Rentenaar, Mudhen and Dead Willow. Except for flyover Cackling Geese i didn’t see a single duck.
Message Date: Oct 05 2017 16:24:38
The Portland National Weather Service Doppler Radar will be down periodically fo
r routine maintenance until around noon. PT 10/05/2017 924 am PDT 1624 UTC.
Message Date: Oct 06 2017 00:09:15
Doppler radar KRTX, serving NW Oregon and SW Washington, will be out of service
for unscheduled maintenance. A return to service is unknown at this time, but is
expected to be Friday.
I’m not seeing any new reports except a Palm Warbler invasion along the coast. I have noticed a sizable increase in pink-footed gulls around the metro area however.
The Seattle radar shows the same pattern as yesterday; good movement across the Strait, probably duck outflow from Nisqually, and use of the western flanks of the Cascades. We haven’t really had any spectacular “green doughnut” days this fall so let’s take a look at Duluth MN to remind us of what that looks like.
While poking around Twitter i came across a very interesting abstract that may be of interest: HERE.
Innovative Visualizations Shed Light on Avian Nocturnal Migration
A bunch of science types put together an open source visualization package that ends up with something like this:
Pretty cool! Maybe i can figure out how to use this research. But not this year, maybe a winter time project.
RTX is still down.
Long-billed Dowitchers and American Pipits are being reported in movement type numbers. Same with Turkey Vultures.
The Seattle Radar shows moderate to heavy migration in places. Most noticeably along the Strait,