Yellow bellied sapsucker invasion

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A good invasion !!!! They nest in Canada, winter in South America. They are migrating Woodpeckers. Their diet is tree sap and insects stuck to the sap. They tap or drill a line of holes around preferred trees; they use the holes to feed trough by re-opening and slightly enlarging and deepening the holes. They are in Missouri now, but will be moving on by the end of the month of April to northern Mn and all of Canada to breed. These pictures taken this past weekend when I saw 25-30 different sapsuckers in a few hours.