Abstract and Summary
Juvenile geese start reacting to odours at the age of 11 to 20 h. In inexperienced goslings head-shaking is released by the odours of plants on which adult geese would not feed (e.g. lavender, violet etc.). Goslings aged 4 to 9 days show a quantitatively different reaction to different odours, such as sage, dwarf-pine, dill etc. Goslings quickly become habituated to odours, they will not react any more if an odorant is presented too often.