The SPI-Birds network in a nutshell (IMAGE) Netherlands Institute of Ecology (NIOO-KNAW) Caption The SPI-Birds network and database. In numbers: 19 species, 80 populations and almost 1.5 million birds. Credit Compilation SPI-Birds network / Szymek Drobniak; Mike Langman; rspb-images.com Usage Restrictions To be used when linked to the SPI-Birds network and database. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.