Parus hudsonicus. copy (6) Bethel, Maine. 1907 January 2I // A mixed flock that lingered long about a sunny opening in dense, well-grown woods (the "Glen Woods") of balsam, arbor vitae and white pine, contained four Hudsonian Chickadees, five common Chickadees, two Golden-crested Kinglets, a male Canada Nuthatch and a male Hairy Woodpecker. A Log Cock called once not far away and Lesser Redpolls flew over at frequent intervals. I had a good opportunity to watch the Hudsonian Chickadees at close range in a clear light and stayed with them for half-an-hour or more making the following notes: For a time they kept high up in the tops of some tall balsams working among the cones, apparently extracting and eating the seeds. The Nuthatch was with them here for several minutes but the Black-cap Chickadees remained lower down. The Hudsonians differed from the Black-caps as follows:- They were much less noisy (often passing minutes at a time in ab- solute silence); they seldom hung head downward; they hopped and flitted among the branches more actively and ceaselessly, spending less time in one place; their shorter tails were less in evidence; they flirted their wings much more with a more nervous, tremulous motion very like that of Kinglets; the black patch on the throat was less conspicuously shown; they appeared shorter, "chunkier" and fluffier; the chestnut brown on the flanks was very apparent. Altogether they seemed to me less attractive and interesting than the Black-caps. In their manner of flitting ceaselessly from twig to twig, as well as by the tremulous motions of their wings, they 92