Birds of Poole Harbour and Roy Dennis Wildlife Foundation began a reintroduction programme in 2017 with the long-term aim of establishing a breeding population.
Each year, up to 14 osprey chicks from Scotland are re-located, reared and released in the Poole Harbour area.
The juveniles usually leave the harbour between in August or September, travelling to their wintering grounds in West Africa, where they remain for a few years before returning to Dorset when they are ready to breed.