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On 4/24/2012 8:29 PM, David & Alison Webster wrote:
> This recent traffic re Swift population decline has prompted me to ask
> 1) whether a decrease in suitable nesting sites may not be a (or perhaps
> the) key factor and
>
> 2) whether effective action is being taken to assure ample nesting sites.
>
> Based on a quick internet search and a memory that spans 75 years the
> answers are (1) yes and 2) no.
>
> All of the preferred nesting sites have been decreasing for 70+ years;
> e.g. hollow trees, unlined chimneys with rough mortar and abandoned or
> seldom used sheds/outbuildings with holes for access.
> how many essential resources must decline to account
> for Swift decline? In my view, one is enough.
>
> And in my view, the time to remedy this deficiency is long overdue.
* yes, sir. A falsifiable hypothesis, if every naturalist promptly
erects such a structure on their grounds. We will do so this spring, in
Bishops Mills, Ontario.
fred
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Frederick W. Schueler & Aleta Karstad
Bishops Mills Natural History Centre - http://pinicola.ca/bmnhc.htm
Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
Daily Paintings - http://karstaddailypaintings.blogspot.com/
South Nation Basin Art & Science Book
http://pinicola.ca/books/SNR_book.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
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