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Index of Subjects I would like to know that too. I kind of thought migration was linked somehow with the hours of daylight, position of the sun & moon or earths magnetic fields. OR none of these? Gayle MacLean Dartmouth ---- Fritz McEvoy <fritzmcevoy@hotmail.com> wrote: > > Hi All, > All these reports of early avian arrivals in N.S. prompt me to ask a couple of questions. > First: How do the migrants know to leave their winter bases early for their breeding grounds; or do they leave at the same time as usual and just arrive early because they don't encounter any bad weather along the way? > Second: Will this great weather encourage birds to breed earlier than usual and if so are they likely to breed for a second or third time this year; even if they normally breed only once before leaving for their winter homes? Or will they just leave for their winter homes early? > All the best. > Fritz McEvoy > Sunrise Valley, CB
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