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chimney swifts</DIV>
On 5/2/2012 10:02 PM, David & Alison Webster wrote:
> I found a few descriptions of artificial nesting sites that should work
> but none that had been proven to work. Both hollow trees and chimneys
> have in common a comparatively good heat storage capacity. [If you burn
> much energy feeding on the wing then you have less energy to keep you
> warm at night. Consequently I suspect a suitable nest would have to be
> designed to capture and store insolation energy.
* that may vary geographically - I found plans for nest structures from
Texas that included provisions for insulating the inside of the tower
from too much solar heating.
fred (still looking for good generalized plans).
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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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