It is unclear how Black Harriers will react to increasing pressure by wind farms. However, given that the species already suffers from low genetic diversity and habitat loss throughout its restricted distribution \citep{Curtis2004,Fuchs2014,Simmons2005}, it is unlikely that the species has the mechanisms or latitude to absorb additional mortality. Given the restricted breeding distribution of this species in south-western South Africa \citep{Simmons2005}, a region ear-marked for wind farm development (DEA Ref, IRPPP?), the likelihood of further fatalities at South African wind farms seems certain without very careful siting, avoidance and intensive mitigation measures at those farms known to be killing harriers. Furthermore, due to the diminishing extent of favourable Black Harrier habitat \citep{Curtis2004}, we anticipate that vacant territories produced by wind farm mortality could be readily occupied by floating individuals, which could, in turn, create a population sink.