On Wed, 15 May 2013 08:06:33 -0700 (PDT), Robert Macy
wrote:

PS: many of these birds are 'seed' eaters, so don't tell me we sound
like bugs in here! ok, a giant nut, i walked into that one.

Do your windows have a reflective film :banghead

Are the birds migratory birds?

Did the birds find a stash of fermented seed?