Kristiansen J.N. & Petersen B.M. (2000) Remote sensing as a technique to asses reedbed suitability for nesting Greylag Geese Anser anser. ARDEA 88 (2): 253-257

We studied Greylag Goose Anser anser nest distribution in relation to reed stem density in the Tommerby Fjord reedbed, Denmark, using aerial photography to locate nests. Digitised photographs were used to establish a relationship between spectral signature and reed stem density. This technique classified 71% of calibration nest sites correctly regarding reed stem density, and most misclassifications had stem density values near the boundary between density classes. When applied to all 170 identified nest sites, 84% were located in low-density reedbeds