7 July 2010 Last updated at 21:00 ET

Black redstart hatches chicks at secret Birmingham nest

The black redstart's new home in Birmingham

One of Britain's rarest birds has successfully raised four chicks at a secret location in the centre of Birmingham.

There are between 20 and 70 breeding pairs of black redstarts in England and Wales and only three pairs in Birmingham, says the RSPB.

The species likes to nest in abandoned buildings near water and often sets up home in old factories.

It was feared city regeneration had reduced the bird's available territory.

The species is about the size of a robin and feeds on insects.

The four chicks have been ringed with a unique number to allow experts to track their movements.