An RSPB spokesman said: "The RSPB does not allow shooting on its reserves unless there is a significant benefit for conservation. At Langstone Harbour, the arrangement with the club means we can effectively influence the level and manner of wildfowling across the whole harbour, which is internationally important for several bird species.
"We would only enter in to such an agreement with a club like the Langstone and District Wildfowlers and Conservation Association, who are responsible, well-managed and set a very good example to other wildfowling clubs in areas where conservation interests have much less influence."
"By swapping shooting rights on our reserve in exchange for not shooting other areas under the club's control, there is an overall benefit for wildlife in the estuary."