BTO Data and Information

Information published on our website

Facts and Figures on British birds

Trends in numbers and breeding performance over 50 years

Which birds can be found near you

BTO survey information

Detailed Information on BTO Surveys

Search for data

BTO Data policies

The BTO's Data Policy

The BTO statement on Data Quality

Data on Sensitive Species -- BTO statement

BTO Library

The BTO has a comprehensive library in Thetford containing many books, journals, local bird reports, ringing reports and grey literature; as well as archives from its surveys and from some individuals associated with the Trust. 

See the BTO library catalogue of material.