Hi All,

I apologize for the confusion. I am also not aware of any published information 
on the routes of Gray-cheeked Thrush migrating from Brithish Columbia. In 
addition to the link provided by Nathan regarding Swainson's Thrush, the below 
articles show Veery (not GCTH) breeding in BC use an eastern route across the 
northern Rockies. However, it seems plausible that Gray-cheeked do the same.



The pull of the Central Flyway? Veeries breeding in western Canada migrate 
using an ancestral eastern 
enesUnderstanding nonā€breeding season movements and identifying wintering areas 
of different populations of migratory birds is important for establishing 
patterns of migratory connectivity over the annual...



The Auk - BioOne<http://www.bioone.org/doi/abs/10.1642/AUK-14-260.1>
ABSTRACT We investigated movements of a western population of Veeries (Catharus 
fuscescens) breeding in the Okanagan region of British Columbia, Canada, in 
2013 ...

C. Heckscher

From: bounce-2412563-53236...@mm.list.cornell.edu 
<bounce-2412563-53236...@mm.list.cornell.edu> on behalf of Nathan Hentze 
Sent: Thursday, November 9, 2017 5:14:12 PM
To: Night Flight Call Discussions
Subject: Re: [nfc-l] Gray-cheeked thrush?

Hello Christopher and all,

I am unfamiliar with a study from British Columbia tracking Gray-cheeked Thrush 
(but I would be happy to be directed to any such studies). There was a study 
that compared migration routes of different Swainson's Thrush populations from 
BC, and that might be what is being referred to here? That article can be found 
online at:


Gray-cheeked Thrush has been known to occur relatively far south in western BC, 
as well as on the west side of the Rockies (see 
http://www.birdatlas.bc.ca/accounts/speciesaccount.jsp?sp=GCTH&lang=en) so it 
wouldn't at all surprise me if some of these birds migrate on the west side of 
"the divide". Regardless, it's cool to see new records of birds for regions 
from NFC detections.

Nathan Hentze,
Victoria, BC

From: bounce-2412475-53236...@mm.list.cornell.edu 
<bounce-2412475-53236...@mm.list.cornell.edu> on behalf of Christopher 
Heckscher <checksc...@desu.edu>
Sent: Thursday, November 9, 2017 6:37 AM
Cc: Carrie Voss; Kate Stone
Subject: Re: [nfc-l] Gray-cheeked thrush?

I agree with Ken this is definitely a Gray-cheeked Thrush. Interestingly, GCTH 
tracked from breeding grounds in western British Columbia via geolocators and 
GPS units show routes eastward across Montana prior to moving south toward the 
Gulf of Mexico.

Christopher Heckscher


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