Aerial view of Sandbanks, a narrow spit of land extending into Poole Harbour, with Studland and Brownsea Island beyond, Dorset, England, United Kingdom, Europe

Common Terns (Sterna hirundo), in their breeding colony in June, on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

An avocet (Recurvirostra avosetta), at Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

An avocet (Recurvirostra avosetta), at Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Little Egret (Egretta garzetta), during the breeding season, on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Red Squirrel (Sciurus vulgaris), in conifer woodland on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Shelduck (Tadorna tadorna) pair, on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

Sandwich Terns (Sterna sandivicensis), in their breeding colony in June, on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

Sandwich Terns (Sterna sandivicensis), in their breeding colony in June, on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Red Squirrel (Sciurus vulgaris), in conifer woodland on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Red Squirrel (Sciurus vulgaris), in conifer woodland on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Shelduck (Tadorna tadorna), on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Black-headed Gull (Larus ridibundus), on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Red Squirrel (Sciurus vulgaris), in conifer woodland on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

Common Terns (Sterna hirundo), in their breeding colony in June, on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

Sandwich tern (sterna sandvicensis), brownsea island, uk, in flight with fish in beak.

Sandwich tern (sterna sandvicensis), brownsea island, uk, in flight with fish in beak.