The honey buzzard is one of the UK's rarest and most secretive breeding birds, with only 40-50 pairs nesting in mature woodland. Its welfare depends on both woodland quality and the wasp and bee larvae on which it uniquely specialises.
Honey buzzard welfare is directly threatened by loss of mature broadleaved woodland with the diverse invertebrate communities supporting wasp and hornet nest abundance. The species is highly sensitive to human disturbance at nest sites — even experienced birdwatchers observing from a distance can cause nest abandonment if they approach too closely. Illegal nest watching (visiting sites to photograph nesting birds) is documented in the UK and causes direct welfare harm. Pesticide use that reduces wasps and hornets — viewed by many landowners as pests — eliminates the food supply for this highly specialised predator. Conservation relies on a small network of trusted woodland owners who maintain the strict secrecy essential to nest site protection.