The "Ipswich" Savannah Sparrow is not currently considered a separate
species, but is referred to in various field guides as a separate
"population", "form", or "race" of the Savannah Sparrow. Its population is
said to breed exclusively on Sable Island, Nova Scotia and probably numbers
less than 1,000 individuals (The Birders Handbook, by Ehrlich, Dobkin, &
Wheye).
Mark Suomala
www.marksbirdtours.com
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