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Tweet of the Day is a series of fascinating stories about our British birds inspired by their calls and songs.

John Aitchison presents the lesser spotted woodpecker. Lesser spotted woodpeckers are the smallest of our three woodpeckers and about the size of a house sparrow. They have horizontal white stripes across their backs, hence their old name of 'barred woodpecker'. The lesser spotted woodpecker is one of our most elusive birds. For most of the year it's relatively silent but in late February and March, males begin to stake out their territories in old woods and orchards by calling loudly and drumming softly.