05:58Tweet of the DayBlue Rock ThrushBBC Radio 4 Duration: 1 minute Tue 10th Aug 2021, 05:58 on BBC Radio 4 LWAvailable for over a yearListen nowLiz Bonnin presents the blue rock thrush, perched high on a Spanish castle. Show more GenresFactualScience & NatureBrandTweet of the Day Source: BBC Online