Interestingly, I've actually heard that Hooded Warbler version frequently in NJ. I've heard that the "different" songs used by migrants, especially warblers, are the dawn or "aggressive" songs. I have never had an explanation as to why birds mix up their repertoires with different songs, but I have heard this dawn/aggressive song used to explain variations in song frequently. Maybe they just get bored singing the same thing! 

Mike H.
Baltimore City

On Jun 4, 2012, at 12:45 PM, Dan Haas <> wrote:

> Oddly enough, at Finzel late last spring I video'd this HOODED WARBLER
> singing an odd tune as well.
> 
> http://www.flickr.com/photos/nervousbird/5777566684/
> 
> Maybe there is something in the water in that swamp that causes birds
> to mix and match and jazz up their standard tunes?
> 
> Good Birding,
> 
> Dan Haas
> St. Margaret's, MD
> nervousbirdsatgmail.com
> 
> On Mon, Jun 4, 2012 at 9:44 AM, Robert Ostrowski <> wrote:
>> Matt's excellent post about the importance of getting visuals on
>> Golden-winged/Blue-winged types on Old Legislative Rd reminded me of a
>> recent experience with a different group of warblers. A few weeks ago, my
>> brother Mike and I were walking at Finzel Swamp and heard a Hooded Warbler
>> singing in the parking lot. Something seemed slightly off to me, whether it
>> was a nuance to the song, or the habitat, or whatever, so I decided to
>> track the singing bird down. When I found it on a branch, I was shocked at
>> what I saw: a perfectly typical male Black-throated Blue Warbler. On our
>> way back out of the swamp, we crossed paths with Jared and Victoria Fisher
>> who had also heard the Hooded Warbler. We gave them the funny news that it
>> was a Black-throated Blue Warbler. Thankfully, Jared was able to later
>> track it down too and get some video footage of the bird singing. He posted
>> it on Youtube: http://www.youtube.com/watch?v=NIBTYmz1f_A
>> 
>> I'm learning more and more not to take anything for granted!
>> 
>> Rob Ostrowski
>> Crofton, MD
>> 
>> 
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