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Birds and ancient trees

A wide range of bird species nest inside the cavities of older trees, such as owls, kestrels, marsh tits and tree-creepers. Some, like woodpeckers and nuthatches, modify the cavity and its access considerably; others adopt the existing cavity with little or no modification.

Some birds are dependent on trees for the bulk of their food, such as foliage gleaners like titmice and warblers. Others feed upon the invertebrates associated with wood decay. Most birds pick their prey from the external surfaces and shallow cavities. Woodpeckers however, specifically break into decaying wood in search of food.

Robin on branch