Telescopes have been set up to view the Montagu's harriers

A pair of Montagu's harriers and their two young can be seen at the RSPB's Frampton Marsh reserve near Boston.

People can see the birds at a special viewpoint until the end of the month.

The RSPB kept the nest site secret until the young birds hatched to stop thieves stealing the eggs, which are highly prized by collectors.

Specially-mounted telescopes on the Lincolnshire coast near Boston have been set up for public viewing since the end of June.

"With no more than a dozen pairs of Montagu's harrier nesting in England each year, it is the rarest breeding bird of prey in the UK and up to now it has been difficult to obtain good views of this bird," said the RSPB's Steve Rowland, when it opened.

The watch point has been organised by the RSPB under the Aren't Birds Brilliant scheme, which runs dozens of projects across the UK, aimed at encouraging people to take a closer interest in birds.

The RSPB Montagu's harrier viewpoint - The Fully Monty - is at College Farm Frampton Marsh, Boston, Lincolnshire, until 29 August.