BANGOR DAILY NEWS • April 22, 2020
Here’s a birding game you can play at home. Identify the trill. Trills are defined as a rapid alternation between two musical notes. Only a few birds trill. In Maine, there are four: pine warbler, chipping sparrow, dark-eyed junco and swamp sparrow. If you hear a trill, it’s one of these. All the trillers are singing right now. They sound similar to each other, but not identical. Get to know one, then compare it to what you’re hearing in the field. Improve your birding-by-ear skills, starting today. ~ Bob Duchesne