Breeding Bird Survey (BBS)
This is probably the most important continuous survey in Britain. Run by the BTO, its results are regarded by government as one of the most reliable monitoring tools for changes in bird populations, and therefore in the natural environment generally. More BTO information can be found here.
Waterways Breeding Bird Survey (WBBS)
Much less well known than the BBS, this survey is based on similar principles. It is intended to monitor species which are not well covered by the BBS. Routes are therefore on a defined length of waterway rather than a specific grid square. More BTO information can be found here.
Wetland Bird Survey (WeBS)
This monthly survey is run during the winter period, and is particularly relevant in Suffolk, where our estuaries and coastal reserves support large numbers of ducks and waders which breed in the far north. More BTO information can be found here.
Heronry Survey
Started in 1928, this is the longest running continuous survey in Britain. More recently interest has been added by the spread of Little Egrets. More BTO information can be found here.