Birdtrack provides this interesting facility where one can look at the reporting rates of any species this year compared with the long term average. Reporting rates are the proportion of complete bird lists (for a visit to a location) that contain the relevant species.
The data from this year ought to be comparable with the long term average unless emphasis has shifted strongly towards recording bird lists in different places or different ways this year. That is possible, since this year, this spring, is a Hen Harrier survey period, but that should lead to relative over-representation of Hen Harriers this year compared with previous years.
There is an interesting blip for two weeks in late May, but aside from that, almost all this year’s points are below the long term average.
No surprise really, and the picture could change (even retrospectively) but some support for the idea that there are even fewer Hen Harriers around than usual this year. I wonder where they’ve gone.
Gunning Wildlife and Conserving Tadpoles said ‘t’s th lck f vwls tht s th cs’ and everybody else said ‘Really? There there! Don’t mention the pole traps‘.
Many thanks to Phil from Birders Against Wildlife Crime for pointing me in this direction.