Daily Archives: September 29, 2018

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[IBLE] Fwd: [sbcobirding] How Broad-winged Hawks get to our county (BTW, this is in SoCal, not in Idaho)

After all these years, birding lingo still cracks me up……see in red below

This is a fascinating chase,

And fun reading…. =)

Larry

—– Original Message —–

From: co-conspirator somewhere in the Pacific NW 😉
To: “LARRY ARNOLD”
Sent: Friday, September 28, 2018 8:58:23 AM
Subject: FW: [sbcobirding] How Broad-winged Hawks get to our county

Geez, these people are dedicated! Dealing with the gobs of traffic in coastal California to track a bird the old fashioned way, wow, I tip my hat to them!

From: main@sbcobirding.groups.io [mailto:main@sbcobirding.groups.io] On Behalf Of Wim van Dam
Sent: Thursday, September 27, 2018 10:41 AM
To: sbcobirding
Subject: [sbcobirding] How Broad-winged Hawks get to our county

All right, the good news is that yesterday (Wednesday September 26, 2018) the Golden Gate Raptor Observatory sighted 74 Broad-winged Hawks moving in our direction.

Obvious question: how long will it take them to get to our latitude? I found the following N=1 data point involving “Journey”, which was successfully tracked by GGRO using radio telemetry. (Unlike Red-tailed Hawks, Broad-wings are too small for GPS tracking.) Following a migrating bird with radio telemetry is extremely labor intensive and in the links below you can read the entertaining story of a team of people tracking Journey as it flew from the Bay Area to the US-Mexico border.

Some relevant data points are:

– Wednesday September 23, 2015: Journey gets caught and released in Sausalito, just north of San Francisco

– Wednesday night he roosted just south of San Jose

– Friday night he roosted around our Figueroa Mountain

– On Saturday he was south of LA

– On Monday Journey crossed over the US-Mexico border.

This trip was unusually fast with good weather, but it seems that those 74 Broad-winged Hawks could start showing up in our county as soon as Friday afternoon.

Here’s where you can read about the ordeal of tracking this bird:

http://ggrotelemetry.blogspot.com/2015/09/the-journey-has-begun.html

http://ggrotelemetry.blogspot.com/2015/09/thursday-sept-24-2015.html

http://ggrotelemetry.blogspot.com/2015/09/friday-sept-25-2015.html

http://ggrotelemetry.blogspot.com/2015/09/saturday-september-26-2015.html

http://ggrotelemetry.blogspot.com/2015/09/sunday-september-27-2015.html

http://ggrotelemetry.blogspot.com/2015/09/monday-september-29-2015.html

Good stuff.

Wim

—
Wim van Dam (Solvang, CA)

SBCO #377+3: Least Bittern

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