Table 1 Pairwise comparison of habitat suitability at the non-breeding grounds for three breeding populations of Nightingales in 2001 and 2020. Differences P < 0.05 are shown in bold, differences at P < 0.1 are shown in italics. Sample sizes were based on number of individuals per population.

From: Extreme migratory connectivity and apparent mirroring of non-breeding grounds conditions in a severely declining breeding population of an Afro-Palearctic migratory bird