05:58Tweet of the DayRed-winged BlackbirdBBC Radio 4 Duration: 1 minute Mon 8th Sep 2014, 05:58 on BBC Radio 4 LWAvailable for over a yearListen nowSir David Attenborough presents the North American red-winged blackbird. Show more GenresFactualScience & NatureBrandTweet of the Day Source: BBC Online