Abstract
Due to legal changes, as well as the increasing importance of organic agriculture, free-range housing systems for laying hens are on the rise. There are only a few reliable investigations about free-range behaviour and to what extent the laying hens take advantage of the free-range. At the Bavarian State Institute of Agriculture the free-range behaviour is being researched with the help of automatic image recording and analysis. On selected days during the study, the average number of hens on the free-range was 109 out of about 500. The identification accuracy on these days was about 84%.
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