I have read that song sparrows are very territorial and will attack a rival that has invaded its territory.? The one by your window probably saw its refection in the window, mistook it for a rival, and attacked it.
?Bill Anderson; Edmonds, WA. USA
From: Anne Kahle <wanderingalb at msn.com>
To: "tweeters at u.washington.edu" <tweeters at u.washington.edu>
Sent: Sunday, December 7, 2014 12:16 PM
Subject: [Tweeters] Song Sparrow behavior

<!--#yiv0337548744 .yiv0337548744hmmessage P{margin:0px;padding:0px;}#yiv0337548744 body.yiv0337548744hmmessage{font-size:12pt;font-family:Calibri;}-->?Why does a Song Sparrow stand on a bouncing branch, one foot from my window, and fly up and peck the window every 10 to 20 seconds for a half hour at a time ?
Anne Kahle
Castle Rock

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