BIRD lovers hatched a covert operation in Upton Warren to protect a nest of rare eggs from unscrupulous collectors.

A round-the-clock guard has ensured the safe arrival of four Avocet chicks at the Worcestershire Wildlife Trust (WWT) reserve.

It's the first time the rare birds have been bred in the county and they make Upton Warren the most successful inland breeding site in Great Britain. WWT reserves assistant John Hodson said: "This is a really exciting event.

"Avocets normally nest along the North Sea coast from Kent to Yorkshire.

"It would be wonderful if this proves not to be a one off but heralds a genuine range expansion, with the birds beginning to occupy different habitats."

The celebrated chicks have dedicated volunteers and WWTs staff to thank for their safe arrival.

Helpers were sworn to secrecy about the nest and a 24 watch operated for five weeks. Cash has been spent erecting fox proof fencing but the tiny hatchlings still face the danger of being taken by crows or gulls.

Avocets are wading birds and are particularly striking because of their long fine bills which they sweep from side to side while feeding. At just a few days old, the chicks at Upton Warren are currently grey and downy but already searching for food in shallow water.

Experts believe their parents favoured the inland reserve because of its unique salt marsh. Saline pools have been caused by underground brine seepage.

This has created a top bird watching site and attracts many rare species.