Private lives of Coquet Island puffins on CCTV
The previously hidden lives of puffins on Coquet Island have been filmed by an underground camera.
So far it has obtained what is thought to be the first footage of a puffin feeding her young on the island, which is off the coast of Northumberland.
Footage is being sent to the Northumberland Seabird Centre so visitors can watch it and learn about the birds.
The camera is 30mm (1.18ins) in diameter and 100mm (3.94ins) long.
Paul Morrison, RSPB site manager on Coquet Island, said: "I've been here for years and this is the first time I've been able to see what goes on under the ground.
"There are 20,000 puffins underground and we had no idea what they get up to, to get a glimpse of that and see their behaviour is brilliant.
"Watching them bring in sand eels, and feeding their young, it shows it's a good season, which is great because their survival relies on that.
"The cameras will be here as long as the puffins are, so that's at least two weeks."
Michael Lynch, of 2020 Vision, which made the camera, said: "This is something we have never attempted before, it is an exciting challenge for us.
"The icing on the cake is to unearth unique information about this amazing bird."