It's getting to be the time of year when the Arctic Circle experiences "Simmerdim," the Scottish term for the long twilight when the sun drops just below the horizon for only a few hours each night. Orcadian singer-songwriter Merlyn Driver's forthcoming album honors the (now endangered) Eurasian Curlew, which wades and sings on the shorelines of those northern islands, during those hours of dim light. Proceeds from his forthcoming album Simmerdim: Curlew Sounds will support efforts by the Royal Society for the Protection of Birds to restore Curlew habitat.