Birds
Sapsucker
Sphyrapicus spp. · also called sapsuckers
A sapsucker returns to a tree it drilled days earlier, checking a neat row of shallow wells still slowly weeping sap. A hummingbird darts in to feed from the same wells moments after the sapsucker moves on, benefiting from work it did nothing to create.
Overview
Sapsuckers, genus Sphyrapicus, are woodpeckers native to forest habitat across North America, distinguished by their habit of drilling organized rows of sap wells into tree bark. Their feeding behaviour creates a resource shared by numerous other species, giving the sapsucker an outsized ecological role beyond its own diet.
A woodpecker that feeds more than itself
Every well a sapsucker drills becomes a small, shared resource, drawing in hummingbirds, insects, and other opportunistic feeders long after the sapsucker itself has moved on to maintain wells elsewhere in its territory.
Status
Least Concern — widespread and stable across suitable forest habitat throughout North America.
Sapsucker: common questions
Why does the sapsucker drill neat rows of holes in trees?
A sapsucker drills distinctive, organized rows of small, shallow wells into tree bark specifically to access the sap that wells up from the tree, returning repeatedly to maintain these wells over time rather than drilling randomly across the trunk the way some other woodpeckers might when searching for insects.
Do other animals benefit from sapsucker drilling?
Yes, the sap wells drilled by a sapsucker attract insects and provide a sap source exploited by numerous other species, including hummingbirds, which in some regions time aspects of their migration to coincide with active sapsucker wells, benefiting indirectly from the sapsucker's own foraging activity.
Can sapsucker drilling actually harm a tree?
Yes, repeated, extensive sapsucker drilling on a single tree can cause noticeable damage, including bark scarring and, in some cases, increased vulnerability to disease or pests, particularly when the same individual tree is targeted repeatedly by sapsuckers across multiple seasons.
Where do sapsuckers live?
Sapsucker species are native to forest habitat across North America, with some species migrating seasonally between northern breeding grounds and warmer wintering areas further south, following the availability of suitable trees and mild enough conditions for sap to flow.