How many blue tits survived? Have the kestrel chicks hatched? Did the kingfishers try to start a new family?

These, and many other questions, will be answered this evening when highlights of the Bird in the Nest programmes, which were screened three weeks ago, are followed by updates from the nesting sites.

"We've had hundreds of letters from people wanting to know what happened to the families," says producer Hilary Jeffkins. "We hope to have news from all the sites we featured."

That means a visit to the blue-tit box where two of the babies had died but where the six survivors were feeding well when viewers last saw them, to the pied wagtails, who had built their nest in a working tractor, and to the swallows and robins.

"We're keeping our fingers crossed that the kestrels will hatch in time for the programme," Jeffkins adds. "The adults incubate the eggs for 28 days so it will be touch and go whether we will see the chicks."

The presenters are Bill Oddie and the RSPB's Peter Holden.