A Little Aggressive

Our winter visitor Red Breasted Nuthatches moved in with both barrels blazing.  Today I watched with interest as one of the RBN's harrass a Carolina Chickadee at the peanut feeder.  The chickadee wasn't given a chance: the nuthatch chased it (or them?) out at every turn.  The birds don't understand that I will keep filling the feeders, so they take up a defensive position at good food sources.  It is merely here that the nuthatch is so much more aggressive as a rule.  And I have seen this same behavior with its larger cousin, the White Breasted Nuthatch.  So the chickadees need to step up their game if they want a bite of peanuts!