You can contribute with your data in your home country or in other European country. Any reliable information on presence of bird species in breeding period between 2013 to 2017, with atlas breeding codes is valuable. Each country has its specific methodology, based on the methodology of EBBA2 and we recommend that you should contact a national atlas coordinator for details and instructions. In case you want to contribute with your data from the other countries, particularly data from eastern and southeastern parts of Europe will be appreciated. Although we also recommend that you should contact a national coordinator in a particular country, general guidelines for foreign birdwatchers who want to contribute to EBBA2, are also available.