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Tracks and Signs of the Birds of Britain and Europe (Delete (Helm Identification Guides))
Tracks and Signs of the Birds of Britain and Europe - Delete Helm Identification Guides Author:Roy Brown, John Ferguson, Mike Lawrence, David Lees A guide to the tracks and signs of the birds of Britain and Europe - resident, visiting and vagrant. Feeding and behavioural signs, pellets, droppings,feathers and skulls are all dealt with in detail.