Common Loon Pair on Mare Meadow Reservoir, in Westminster.
From 1999 to at least 2004 the Biodiversity Research Institute (Maine) captured and color banded many breeding and or territorial loons in Massachusetts. These close loons presented an opportunity to see if either of this pair were banded. One of the pair was cooperative, showing both legs, the left leg was: Blue/White and the right leg: Blue (stripe)/silver (the metal band with the info).
A number of years back I had email the folks at BRI for the color combinations on the Massachusetts loons they'd banded....so from that.... This bird is a male that was captured on Paradise Pond (Princeton, ma.) in 2003. Paradise Pond is only a "stone's throw" away, the pair had bred there, successfully for a few years, before "moving out" 2 years back. Perhaps they will find success on Mare Meadow, which has several small islands and no boat traffic.