Abstract  Coordinated night-roost counts were used to survey Little Egret Egretta garzetta numbers and seasonal usage of Morecambe Bay and the Duddon Estuary, Lancashire/Cumbria, between September 2018 and March 2020. Numbers occupying night roosts were found to peak in the study area in late summer/autumn, at around 900 birds. The origin of birds fuelling this increase in the po

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