Young Squirrel At Boston Common

Took advantage of the seemingly warm weather to get to Boston Common, for the usual feeding activity. Got one squirrel, an apparent veteran, to eat while seated on my knee. This young one was not in the best of health, left eye half-closed, though without sign of damage, and alternately crouching in a standstill and circling to the right. He(/she?) was able to climb a tree, though having trouble (or lacking an interest in) grabbing onto the nuts I was offering.