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Re: Salvia, Re: Siskin, and Re: Song Sparrow
- To: Joshua Stuart Rose <jsr6@duke.edu>
- Subject: Re: Salvia, Re: Siskin, and Re: Song Sparrow
- From: "K. Dean Edwards" <kde@angst.engr.utk.edu>
- Date: Mon, 29 May 2000 18:33:45 -0400 (EDT)
- cc: carolinabirds <carolinabirds@duke.edu>
- In-Reply-To: <Pine.SOL.3.91.1000529153835.7140G-100000@bio1.acpub.duke.edu>
- Sender: carolinabirds-owner@acpub.duke.edu
Email from Joshua Stuart Rose (2000-05-29 16:18 -0400) :
...
> I think that Brown-headed Cowbirds have been recorded parasitizing Song
> Sparrows, but not often.
....
Actually, Song Sparrows are one of the species most commonly parasitized
by cowbirds. The _Atlas of the breeding birds of Tennessee_ cites a
study which has shown that approximately 30% of all Song Sparrow nests
are parasitized by Brown-headed Cowbird (Freidmann et al., 1977, Smithson.
Contr. Zoo.).
Personally, that and cardinal are the species I most often see feeding
baby cowbirds --- though the fact that they bring them to the feeder no
doubt helps. The first brood seems to be the most susceptible.
-------------------------------------------------------------------------
K. Dean Edwards
Ph.D. Candidate, Mechanical Engineering
University of Tennessee, Knoxville
kde@utk.edu
Phone -- 865-974-7358
Fax -- 865-974-5274