In the countryside, red kites were formerly blamed for killing game and livestock and were persecuted relentlessly. Despite their scavenging habits, the bird's large claws and hooked bill were sufficient to condemn them in the eyes of many farmers and gamekeepers. By the early part of the 20th century, the British population was limited to a few pairs in remote parts of central Wales where levels of human persecution were lower. Sadly, kites in Britain still fall victim to illegal persecution, despite our greater knowledge of the bird and its habits. In England it is estimated that as many as 80 birds have been killed by poison baits during the last 10 years. These are often intended for crows and foxes but are indiscriminate and the kite, with its scavenging habits, is a frequent victim. An additional threat is posed by highly toxic anticoagulant rodenticides used to control rats. Red kites are at risk if they scavenge on rats that have been poisoned and subsequently die. In addition, the kite's eggs are a target for egg collectors.
It had long been hoped that red kites would find their way back to England naturally as their numbers increased in Wales. However, the Welsh population has been slow to increase and expand its range due to the low level of breeding success and reluctance for birds to breed far from the nest site where they themselves were reared. In order to improve the fortunes of the red kite it was decided to try to reintroduce them to suitable areas in England and Scotland. English Nature, Scottish Natural Heritage and the RSPB began a project in 1989 using nestlings brought in from Spain and southern Sweden. The young birds were kept in captivity for six to eight weeks with minimal human contact, before being released into the wild. The red kite was one of the founding species in English Nature's Species Recovery Programme and represents one of the Programme's biggest success stories to date. Over a period of five years, 186 young kites were released in the Chilterns of southern England and in northern Scotland and self-sustaining breeding populations have become established in both areas. Further projects in England have resulted in a breeding population becoming established in the East Midlands (in partnership with Forest Enterprise) and releases began at the Harewood Estate in Yorkshire in 1999 in a project funded by Yorkshire Water.
In the year 2000, a breeding survey recorded 16 pairs in the Midlands, three pairs in Yorkshire, and well over 100 pairs in the initial release area in the Chilterns. Whilst the future of the red kite is by no means totally secure, the project has so far been a great success and is an excellent example of what can be achieved by a well-planned and carefully monitored reintroduction programme.