The group of rare chicks are thought to be the babies of one of several birds that were recently released into the reserve to help boost numbers.

The corncrake, which is related to the moorhen, is a summer visitor from Africa and nests in Scotland.

It's the most threatened bird in the world which nests in the UK.

The Royal Society for the Protection of Birds (RSPB) has been working closely with the Zoological Society of London and English Nature on the Corncrake project.

Together they released 55 young birds into the Nene Washes reserve in Cambridgeshire last year, and another 59 this year.

'Virtually extinct'

Although it's looking good for the corncrakes, 13 other birds are becoming rarer and rarer in the UK.