I had to read up on the sap suckers and discovered that the tapped holes to get at the sugar rich fluid of the phloem.
It seems like the sapsuckers provide an for the supply of nectar that is 90% of the Hummers survival diet!
How do Hummingbirds Benefit from Sapsucker drilled “wells”?
“Fortuitously, phloem sap is nearly identical in sugar content to flower nectar, providing hummingbirds with a suitable alternative. This is especially important to hummingbirds like our Broad-tailed, which often arrive on their mountain nesting grounds before many flowers are blooming. Nectar represents as much as 90 percent of a hummingbird’s diet, but they also need protein. The second important part of a hummingbird’s diet is insects, and these protein-rich bugs are also found at sapsucker wells, being drawn there by their own affinity for sweet sap. In summer, these same wells attract migrating Rufous and Calliope Hummingbirds, passing through Summit County on their way south, back to their wintering grounds in Mexico. Interestingly, this same pattern is repeated throughout the sapsucker’s range. For example, the Red-naped Sapsuckers that nest in Colorado in the summer move to southeastern Arizona for the winter. There, they drill sap wells in mesquite trees, drawing Anna’s and Costa’s Hummingbirds to the insect-laden, nutritious sap.”
(Can’t find the correct link, LOL)