Posted on June 15, 2007 by marginnotes_m4x28lBird-related: birds disappearing “Twenty common birds — including the northern bobwhite, the field sparrow and the boreal chickadee — have lost more than half their populations in the past 40 years, according to the society’s research… “Today you can’t find a bobwhite in Pennsylvania, and hearing a whippoorwill is a red letter day,” he said at an Audubon news conference Thursday morning…The researchers say many factors play into the decline in bird numbers, including intensification of agriculture, other loss of habitat, pesticides, invasive species, and global warming.”
