Dominic Couzens on the Crossbill
Tweet of the Day is a series of fascinating stories about our British birds inspired by their calls and songs.
A new series of Tweet of the Day for Sunday morning revealing personal and fascinating stories from some fresh voices who have been inspired by birds, their calls and encounters.
Crossbills are not born with crossed bills, not only that but as they develop their crossing bills, after their 27th day from hatching, their bills can cross either to the left, or cross to the right. It is a 50:50 split. A superb evolutionary adaption but as ornithologist Dominic Couzens explains, it means their diet is limited to conifer seeds or nothing.. In Britain we have the common crossbill and the Scottish crossbill. Whether these are separate species or the same species, the argument continues.
Producer : Andrew Dawes, 麻豆社 Audio, Bristol
Studio Engineer : Ilse Lademann
On radio
More episodes
Previous
Broadcast
- Sun 5 Jan 2025 08:58麻豆社 Radio 4
Podcast: Planet Puffin
Exploring all things puffin - the silly and the serious, the scientific and the cultural.
Try this new podcast
Five stories of birds and birdsong are told by the people inspired by them.
Podcast
-
![]()
Tweet of the Day
Discover birds through their songs and calls. 265 programmes of 90 seconds, over a year
