This past weekend I led a field school on one of my favorite topics, fall birding on Cape Cod. Field Schools are weekend-long courses based out of Mass Audubon sanctuaries, designed to explore some aspect of nature in great detail.
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New Hampshire forests have been defoliated for the second year in a row by the invasive caterpillar now known as the spongy moth. But there is a native bird who benefits from the outbreak.