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Index of Subjects 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 ------------------------------------------------------------ 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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