Yes, and remember Bill's classic thrush tape in which he had, if I am 
remembering correctly, both Wood Thrush and Bicknell's Thrush singing on the 
breeding grounds and interspersing the flight calls in the song? That was such 
a great tape!

Last year when I was in northern Quebec I had Gray-cheeked doing this as well 
but I could never record it..... 

Fun stuff!

Jeff

Jeff Wells
International Boreal Conservation Campaign
Boreal Songbird Initiative


On Oct 11, 2011, at 9:46 PM, "Kenneth Victor Rosenberg" <k...@cornell.edu> 
wrote:

> Jeff et al.
> 
> I have fairly frequently heard Hermit Thrush giving it's nfc on the ground at 
> first light -- especially in early winter, often interspersed with "chuck" 
> notes just as you describe. I have also heard both Swainson's and Wood Thrush 
> giving what sounds like the nfc interspersed with song. I believe that this 
> is one of the ways that Bill Evans first figured out all the thrush calls -- 
> by matching them to calls heard in various contexts during the day and 
> visually confirmed.
> 
> KEN
> 
> 
> Ken Rosenberg
> Conservation Science Program
> Cornell Lab of Ornithology
> 607-254-2412
> 607-342-4594 (cell)
> k...@cornell.edu
> 
> On Oct 11, 2011, at 5:09 PM, Jeff Wells wrote:
> 
>> Yesterday morning  I was out in my suburban yard in south-central Maine 
>> watching a nice morning flight of birds moving over and through when I began 
>> hearing the “chuck” call of a Hermit Thrush from the neighbor’s backyard. 
>> Soon it began alternating between the “chuck” call and the drawn-out “whee” 
>> nocturnal flight call. I went inside to get my camera to record it (my 
>> recording gear was packed away) and by then it had flown up across the 
>> street into the top of a tree. At that point it began just doing the flight 
>> call with no more of the “chuck” call and then it moved to another taller 
>> tree 100 yards away where it stayed and continued doing the call for a bit 
>> before suddenly stopping. It may have flown away or it may have just stopped 
>> calling and dropped down somewhere nearby but I never saw or heard it again.
>>  
>> I was able to get some of the calls on some video clips, one of which I 
>> posted up on my YouTube channel for anyone interested. I think I have some 
>> recordings of Hermit Thrushes interspersing the nocturnal call into songs 
>> during the breeding season and I know I have a recording of a Swainson’s 
>> Thrush doing that.
>>  
>> Anyway, you can hear the calls on the video titled “Hermit Thrush giving 
>> nocturnal flight call” at: http://www.youtube.com/birdconservation
>>  
>> Interestingly, the second call it gives on the video is much burrier than 
>> what I think of as normal and some of the calls seem a bit shorter than what 
>> I am used to hearing at night.
>>  
>> Jeff Wells
>> Gardiner, Maine
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