Southern England Red Kite Group also said it could result in smaller broods.

BBC: Cold March affects red kite breeding in the Chilterns

The species of birds confirmed as poisoned and included in the incidents are red kite, buzzard, golden eagle, tawny owl, and peregrine falcon.

BBC: Red Kite

Southern England Red Kite Group is requesting sightings of red kite nests from members of the public to help it monitor the breeding population.

BBC: Cold March affects red kite breeding in the Chilterns

In some areas of Scotland, the re-establishment of the red kite continues to be jeopardised by illegal killing and each year brings further reports of the persecution of other raptors, notably golden eagles and peregrines.

BBC: NEWS | UK | Calls over birds of prey killings

The red kites which have been released can be recognised by a numbered wing tag, with Rowlands Gill school adopting kite number one.

BBC: NEWS | UK | England | Tyne/Wear | School adopts rare bird of prey