It’ll probably come as no surprise whatsoever to regular readers of this blog to learn that the Moorland Association (grouse moor owners’ lobby group in England) has, in an article published by the Shooting Times this morning, made more false claims about the hen harrier brood meddling trial, this time relating to the findings of the BTO’s recent scientific study on hen harrier population trends.
For new blog readers, the hen harrier brood meddling trial was a conservation sham sanctioned by DEFRA as part of its ludicrous ‘Hen Harrier Action Plan‘ and carried out by Natural England between 2018 – 2024, in cahoots with the very industry responsible for the species’ catastrophic decline in England. In general terms, the plan involved the removal of hen harrier chicks from grouse moors, they were reared in captivity, then released back into the uplands just in time for the start of the grouse-shooting season where many were illegally killed. It was plainly bonkers. For more background see here and here.

You may remember last October the Moorland Association prematurely declared the brood meddling trial “a remarkable success story” and said it had decided to apply to Natural England for a licence to permit the continuation of brood meddling (see here). This happened before Natural England had undertaken a formal scientific review of the trial, which it said would take place by the end of 2024.
In March 2025, Natural England announced the closure of the hen harrier brood meddling trial and published the first of four scientific reports it had commissioned to evaluate the trial. Natural England stated that any decision on the future of brood meddling (e.g. issuing licences for brood meddling to continue) will be based on the findings of those reports. Natural England has not yet published the other three commissioned reports.
The first report it published last month was authored by scientists at the British Trust for Ornithology (BTO) and focused on recent hen harrier population trends. The study used a population modelling approach to try to determine the mechanism behind the sudden increase in the hen harrier population between 2018-2023 and whether that was attributable to the brood meddling trial or to other factors.
The authors used modelling techniques to look at changes in the rates of hen harrier productivity, survival and settlement but there were obvious constraints in the limited data available. They concluded that it was not possible to determine definitively whether the population increase was solely related to brood meddling or whether it was a response to wider environmental drivers (e.g. high prey availability).
As Mark Avery wrote in a recent blog about this study, “Brood meddling of Hen Harrier nests made little or no contribution to the recent rise and fall of the Hen Harrier breeding population. As was predicted in advance, brood meddling is a distraction and an irrelevance“.
The Moorland Association responded to the BTO’s study with a blog posted a few days after the report’s publication (here). It looks to me like an AI-generated appraisal of the study but nevertheless it demonstrates that the Moorland Association was at least aware of the report’s findings.
How on earth then, does the Moorland Association go from that to this, published in the Shooting Times this morning:
In this outrageous article, which is poor even by the Shooting Times‘ low standards, The Moorland Association’s CEO, Andrew Gilruth, claims:
“The seven-year [brood meddling] trial led to the English hen harrier population hitting a 200-year high. The British Trust for Ornithology has concluded that this could only have been achieved through the brood management scheme changing attitudes – a brilliant example of wildlife conflict resolution and co-existence“.
Er, the BTO’s study did not evaluate ‘changing attitudes’ [of grouse moor owners]; it used population modelling to assess hen harrier productivity, survival and settlement, none of which were conclusive to explain the changes in hen harrier population trends!
This looks to me like yet another example of Andrew Gilruth grossly misrepresenting scientific opinion on grouse moor management, for which he has a long-standing reputation (see here). Whether he does this deliberately or whether he’s just incapable of interpretating scientific output is open to question.
The article goes on to suggest that if Natural England doesn’t issue the Moorland Association with a brood meddling licence,
“I fear it will be down to the Moorland Association to ask a judge to decide if Defra’s plan to recover the hen harrier population in England should remain on track“.
If it does end up in a judicial review, which is what Gilruth appears to be threatening, I can think of at least one conservation organisation that would relish the opportunity to intervene in the case.
The IUCN guidelines on species’ translocations are quite clear that one of the fundamental principles in deciding when a translocation/reintroduction is an acceptable option is this:
‘There should generally be strong evidence that the threat(s) that caused any previous extinction have been correctly identified and removed or sufficiently reduced‘.
Given the scandalous continuation of illegal hen harrier persecution on driven grouse moors in the UK (at least 134 hen harriers killed or ‘missing’ in suspicious circumstances since the brood meddling trial began), and that it is widely accepted that illegal persecution continues to be the main threat to hen harrier survival, limiting the species’ distribution and abundance in England, it is clear that the continuation of brood meddling, that isn’t being done solely under the guise of ‘research’ (which is how Natural England got away with the brood meddling trial) should be seen as unlawful if alternative actions (e.g. law enforcement) aren’t considered.
I can understand why Natural England is taking its time to publish all the reports evaluating the brood meddling sham. If it issues a brood meddling licence to the Moorland Association it will almost certainly face a threat of legal action by conservationists. If it doesn’t issue a brood meddling licence to the Moorland Association, it may well face a threat of legal action from the grouse shooting industry.
Interesting times.










