“…During the analysis of all papers found, I excluded those concerning rather nest site fidelity problems than old nest presence itself (Aviles et al 2000), and those on the presence of old nests on nest building during autumn courtship (Pinowski et al 2006). Several papers focused only on the behaviour of old nest removal by birds were also not considered either, because they did not present the birds' breeding parameters in relation to the presence of the old nest nor to this behaviour (e.g.…”