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Re: Blackpolls and other landscape effects on migrants
- To: Carolina Birds <carolinabirds@duke.edu>
- Subject: Re: Blackpolls and other landscape effects on migrants
- From: Craig Watson <jcraigw1@comcast.net>
- Date: Sun, 25 May 2003 09:38:54 -0400
- Delivered-to: pardo@metalab.unc.edu
- References: <20030525031307.87612.qmail@web13401.mail.yahoo.com>
- Sender: carolinabirds-owner@acpub.duke.edu
If you are interested in the study of migrants, of what has happened in
the past, what is currently going on, and what the future may hold, I
suggest John Faaborg's "Saving Migrant Birds", 2002. This is somewhat
of a follow up of John Terborgh's "Where Have All the Birds Gone?" from
1986. Faaborg's book looks at a lot of landscape issues and discusses
exactly what kind of information we can and can not use from current
bird census' and research.
Craig Watson
Mt. Pleasant, SC
(843)881-2652
----- Original Message -----
From: "Kendrick Weeks" <musoikos@yahoo.com>
To: "Carolina Birds" <carolinabirds@duke.edu>
Sent: Saturday, May 24, 2003 11:13 PM
Subject: Blackpolls and other landscape effects on migrants
> Van Horne wrote an excellent paper in 1983 on density
> being a misleading indicator of habitat quality, a
> standard reference and consideration for study design
> and data analysis in current landscape scale
> ornithological research. This is probably exactly
> what is happening not only with Balckpoll Warblers but
> also other migrants. Who here has a favorite migrant
> spot that happens to be a relatively small island of
> habitat in an urban area?
>
> Kendrick Weeks
> Fuquay Varina
>
> Josh wrote:
>
> The consensus seems to be that Blackpolls migrate
> across the landscape
> in
> a more-or-less uniform front. Upon encountering a
> developed area, all
> Blackpolls that would normally be spread across that
> area get
> concentrated
> into the few trees available, those being typically
> the big streetside
> oaks. A few folks have noted that large oaks tend to
> host a large
> variety
> of inchworms and other lep larvae, and that oaks in
> town are more
> stressed
> by heat, pollution, pavement covering their roots,
> etc. and so less
> able
> to resist infestations, thus constituting a very
> long-term and indirect
> sort of bird feeder for insectivorous species.
>
>
>
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