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The sapsucker often prefers to nest in aspens, but can be found in a variety of species. It drills a cavity during late spring to lay its eggs, using woodchips as a nest lining. As their sapsucking, insect trapping ways won’t function during our canadian winters, the sapsucker migrates to more southern forests until spring.
The sapsucker drills these small holes into the bark of the tree, letting sap flow. They’ll set up a few trees like this, then they wait. The sweet sap will attract all kinds of insects creating an instant buffet for the hungry woodpecker. Ingenious!