Nature Note:High Up

A black-throated green warbler sang in the top of a pin oak on the property.This bird breeds from the Northwest Territories across to Newfoundland,and south to Georgia in the Appalachians.I had never encountered one at this low an elevation-420 feet,or 128 meters.It favors open tracts of pine or Canadian hemlock,especially above 2500 feet,or 762 meters.The forest bird hasn't been seen since five days ago,so I'm wondering if it will ever be down here in the foothills again.It measures five inches long,or 13 centimeters,and has white wing bars,in addition to its striking black throat and olive upperparts.There are certainly open tracts of white pine here for it to breed in.