The small global population (Taylor et al. 2015) and the wide-scale movements while breeding (birds ranged from 7.1 to 33.4 km  from their nests) and multiple movements and settlement areas while migrating across South Africa (Garcia-Heras et al. 2019) means they may be more often exposed to wind farm environments than resident species.
Is the model sensitive to small changes in any of the parameters? In particular to those not well understood? What consequences would changes in this parameters have in our results?
One of the most striking results of our analysis is the exquisite sensitivity of Black Harrier populations to adult survival rates. This is probably a characteristic of raptors and other long-lived birds , refs (Carrette? \citep{Mart_nez_Abra_n_2011}  and mammals  (Schorcht et al. 2009) On the one hand this means that uncertainty in this life history parameter could potentially impact our conclusions. On the other hand, considering that fecundity rates for this species are well grounded from all habitats over multiple years (Curtis et a. 2004, Garcia-Heras et al. 2017b), there is little room for changing adult survival rates without drifting away from the current expected population trend.
One of the least understood parameters in the life history of the Black Harrier is the survival rate of young birds. Despite our research programme ringing over 450 juvenile and adult harriers, only 6 recoveries or returns have resulted (SAFRING data base) However, our results suggest that populations are relatively robust to changes in chick and juvenile survival, which reinforces our confidence in our model predictions.