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BRITISH WARBLERS
whole. Insect-life so early in the season is not very plentiful, but they often search the branches for the Chironomidæ. As the season advances they feed more upon insects, but I have seen them in May swallowing the young shoots of the Norway Spruce, and in the latter part of that month they search the oaks and other trees for the larvæ of Tortrix viridana and Chimatobia brumata, and on these larvæ the young are to a large extent fed. In August they frequent gardens in search of raspberries, and as the autumn advances their food consists largely of the berries of the elder (Sambucus nigra) and bramble (Rubus fruticosus).
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