Since the early 1980s, the complex interplay of global warming, habitat shifts and other factors have brought significant change in the types of birds that are at home in Maine:
A black-capped chickadee flies up from a snowy field as it comes in for a landing on a feeder in West Bath, Maine in March of 2009. . The five-year survey documented the range of avian species nesting and raising their chicks here.is nearing completion, and it indicates that since the early 1980s, the complex interplay of global warming, habitat shifts and other factors have brought significant change in the types of birds that are at home in Maine.
"Using that data we're essentially going to be able to create a heat map. It's going to show us abundance, which is amazing. That's never been done in this state before," says Doug Hitchcox, staff naturalist at Maine Audubon. He adds that the"really important thing" will be comparing"this snapshot from before and this snapshot now" to see what's changed.
Take, for instance, what appears to be a significant drop in the local presence of"aerial insectivores" —swallows and other winged acrobats whose primary forage is bugs. Birds like boreal chickadees may face new competition from relatives like black-capped chickadees, which are occupying ecosystems at higher altitudes as they grow warmer.An observed decrease in Maine's population of bank swallows, Hitchcox says, may be driven by changing practices among the state's gravel-pit businesses, which are operating fewer but bigger facilities that are less hospitable for the swallow's embankment dwellings.
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