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Archive for May 7, 2014

Male Rose-breasted Grosbeaks Return

5-7-14 rose-breasted grosbeakIMG_6053Many of the Rose-breasted Grosbeaks that breed in New England are thought to spend the winter in Panama and northern South America. When the time comes in the spring for their nocturnal migration, adult males depart first, flying northward at an average of 49 miles per hour (this rate includes stopovers). Upon arrival, they establish and maintain their two-acre territories primarily through song. When females arrive and one approaches a singing male, he is initially very aggressive and often attacks the female, but if she persists he eventually comes around and wins her over with courtship displays.

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