More recently, Dauphiné and Cooper use
the inflated predation rate suggested by Lepczyk et al. (along with rates proposed by other researchers) to arrive at their «billion birds» figure.
So, even setting aside the complexities of source - sink dynamics,
these inflated predation rates, combined with the fact that «the estimates of breeding density presented in this manuscript should be regarded as minima,» [3] raise serious doubts about whether the site is in fact a habitat sink (or, if so, to what extent).