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Greylag goose on Hogganfield Loch
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Glasgow - Hogganfield Loch
Greylag goose (Anser anser) calling, Hogganfield Loch, Glasgow, taken by Joanna Lindsay. Geese have small, sharp spikes which run along their beak and tongue, known as tomia. These look a lot like teeth, but they are actually formed from cartilage. They do however serve a similar function to teeth, helping geese to cut through grass or grasp slippery prey such as snails.
