05:58Tweet of the DayAfrican Southern Ground HornbillBBC Radio 4 Duration: 2 minutes Fri 11th Sep 2015, 05:58 on BBC Radio 4 FMAvailable for over a yearListen nowMiranda Krestovnikoff presents the African southern ground hornbill. Show more GenresFactualScience & NatureBrandTweet of the Day Source: BBC Online