The BTO has carried out around 250 surveys since the 1930s. These are listed below in approximately reverse chronological order.
Linked to the name of the survey in the below is a full description including details of why the survey started, a summary of its results, its field methods, details of collaborators, organisers, publications and data all under a standard series of headings.
Most of the current surveys also have separate web pages and these are linked where they exist. These contain a variable amount of some but not all of the same information.
A list of surveys which covered any particular species or area is available here.
-- Constant Effort Sites
-- Retrapping Adults for Survival
Nest Records Scheme
-- Nestbox Challenge
-- Barn Owl Monitoring Scheme
Current Special Surveys
Hen Harrier Roosts 1985/86 -
Large Scale completed Surveys
Completed Surveys 2005-2010
Ringed Plover 2007
Little Ringed Plover 2007
Surveys with Fieldwork started 2000-2005
Wintering Warblers 2004/05
Surveys with Fieldwork started 1990-1999
Plover winter flocks 1998