Black-capped Chickadee near the back deck.
Working over a black oil sunflower seed.
Tufted Titmouse with handsome "posture".
Below is a graph of Black-capped Chickadee and Tufted Titmouse per party hour from Massachusetts over the past 50 years. Its hard to believe the Tufted Titmouse was nearly non-existant in Massachuetts 50 years ago.
Retrived December 9, 2010 from http://web4.audubon.org/bird/cbc/hr/index.html