Like the findings on fecal metabolites and H/L ratio, the association between urbanization and corticosterone in feathers (CORT Feather ) does not show a clear trend: (i) higher CORT Feather levels in urban localities in house sparrows ( Passer domesticus ) ( Beaugeard et al., 2019 ) and blue tits ( Cyanistes caeruleus ) ( Dominoni et al., 2021 ); a positive association between air pollutions (trace elements) and corticosterone in common blackbird ( Turdus meru
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Feather corticosterone levels in the southern lapwing revealed no association with the degree of urbanization.
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