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Re: love in the air
- To: shantanu phukan <phukan@email.unc.edu>
- Subject: Re: love in the air
- From: Jason Sircely <sircely@duke.edu>
- Date: Wed, 14 Feb 2001 16:58:28 -0500 (EST)
- cc: carolinabirds@duke.edu
- In-Reply-To: <200102142113.QAA25615@smtpsrv1.isis.unc.edu>
- Sender: carolinabirds-owner@acpub.duke.edu
Shantanu -
I would bet that singing cycles are based on
photoperiod - daily light period length. It's
a much more common and dependable cue than
temperature. Unfortunately I have little direct
information substantiating my claim.
Best,
Jason Sircely
On Wed, 14 Feb 2001, shantanu phukan wrote:
> Date: Wed, 14 Feb 2001 16:20:28 -0500
> From: shantanu phukan <phukan@email.unc.edu>
> To: carolinabirds@duke.edu
> Subject: love in the air
>
> And speaking of love in the air, just four days ago (February 11) I
> heard my first Pine Warbler of the year singing from a Loblolly Pine.
> I wonder if the last three days hushed it up again. Does anyone know
> if birds will be fooled by warm spells and start singing unseasonally
> early, or if their internal clock makes them difficult to fool?
>
> Shantanu Phukan
>
>
_______________________________________
Jason A. Sircely
Department of Biology
Box 90338
Duke University
Durham, North Carolina 27708
Tel: 919-684-2267
_______________________________________