Sunday, March 17, 2019

March 17 Daily Flight Summary

adult light-morphed RTHA


Official Counter         

Adam Richardson

Observers       

None

Weather         

-11 C in camp at 08:30. 30cm of snow still persists along the banks of the Smith River.  By 10:30AM at the beginning of the count it had warmed to -4 C and there was no wind.  Mostly high cirrus clouds for the entire count with a few cumulus developing in the afternoon to the east.  The clouds coupled with a steady south wind 8-14kph kept temps quite cold with a high of 2 C around 14:30-17:00.  It was beginning to clear off to the north near the last 30 minutes of the count.

Raptor Notes 

Another slow day along the Smith River for raptors.  Three eagles came through about 13:00-15:00 (3)BAEA and (1)GOEA.  These birds were flying very low along the first 1,000ft of Jumbo Mountain.  Once they crested the ridge low on Jumbo, they flew behind the near hill that the Smith River Road climbs behind.  From here some of the birds took the eastern route out over Sheep Creek and to the east of Berkins Butte.  Others flew right down the Smith River directly overhead of the OP. 

Keeping track of our residents amongst todays flight provided some useful behavioral information.  For example, residents are highly likely to fly through on the exact same flightpath of the migrants, but detour back north to Berkins Butte to linger.  After this they would then fly to the west side of the entrance of the canyon, but then uphill due west not north (a long unnamed canyon on area maps). 

An interesting sight today was a GOEA adult flying north with an adult light-morphed RTHA in tow.  These birds were right on the heels of the migrating immature BAEA that had just flown the same line low on Jumbo.  No migrating raptors were seen today going high off of Jumbo for that matter.  The RTHA broke off to Berkins Butte and lingered there briefly before coming and perching uphill and to the SW of the OP.  I was hesitant to mark this RTHA as a resident a few days ago, especially after not having seen it again until today.

Later an adult Bald Eagle with smudgy tail flew the same line as all of those prior but broke off to take a few circles over Berkins Butte only to move up into the canyon noted above and in so doing bumping an adult GOEA I had not seen (possibly the one that had flew down with the RTHA in tow).  When the Bald came across from Jumbo a distant GOEA peaked up over the western summit of Jumbo.  It was most likely this second adult GOEA that came across about 20 minutes later only to join the gathering up in the canyon noted above.  This eagle took several circuits over Berkins Butte as well. Near the close of the count a final interaction occurred with an adult GOEA escorting a migrant BAEA from Berkins Butte.  The migrant continuing through the canyon to the north and the GOEA perching back on the butte.

It is good to note raptors as resident if they spend time loitering in the Berkins Butte area.  Most true migrants I have witnessed so far are flapping with all they have to get north or they are climbing as high as conditions permit.  All raptors were flying low today, but only these residents who spent time over Berkins Butte and up the canyon mentioned above exhibited resident behavior.

Non-raptor Notes

(6) Common Goldeneye and (1) Bufflehead appeared today from the south, but didn’t proceed north.  Instead they too joined the growing number of waterfowl upstream where the Johnston Pasture is plowed.  Several CANG flew north making great fanfare only to return hours later.
The Smith River has been running a little these last few days with water running over the ice.  However today after 13:30 it had frozen back over again.  I would imagine water is in a continual flux of open then back to frozen downstream in the canyon.

Visitors           

None

Next Day Forecast

High 39F low of 18F.
East winds 4mph.
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