05:58Tweet of the DaySwainson's HawkBBC Radio 4 Duration: 2 minutes Thu 10th Sep 2015, 05:58 on BBC Radio 4 FMAvailable for over a yearListen nowMiranda Krestovnikoff presents the North American Swainson's hawk. Show more GenresFactualScience & NatureBrandTweet of the Day Source: BBC Online