CORRECTION: An earlier version of this report stated that the RSPB was “expected to come under fire” from Natural England in a forthcoming report about hen harrier nests. The information on which this conjecture was based came from a single source and was not checked with Natural England. We accept that further enquiries might have revealed this and that our article was misleading. Although the RSPB was involved in guarding all six nests that failed, we understand that - contrary to what was stated in the original version of the article - it was also involved with three of the six successful ones. We have amended the article accordingly and we apologise for the error.