i am slowly being made crazy by the incessant sound of robins (a pair of them) bonking their beaks against every glass surface on and around our house. it seems a local nesting pair has decided to drive off the strangely attractive yet rival robins that seem to be following them everywhere!
this is, apparently, normal behavior, and, according to the massachusetts audubon society, rarely harms the birds. mass audubon remains silent, however, on the effect of this behavior on the mental health of the humans inside the house!