What is a horned screamer? Horned screamers are the unicorns of the bird world. Over the course of their lives, these birds grow long, white spines of cartilage in the middle of their foreheads.

To celebrate the beginning of spring in the Gaelic calendar, ornithologist Seán Ronayne is across the schedule on RTÉ lyric fm with a new series to discuss the distinct bird songs, melodies and calls ...