Stock Photo: Sapsucker Sapwell Holes In Young Tree Trunk
ID 270355824 © Mccrainemercantile | Megapixl.com
The holes are known as sapwells, and the sapsucker makes them so it can eat sap that drains from inside the tree. It also eats insects that may have been trapped in the sap, although sapsuckers are mainly interested in the sap itself. Unlike other woodpeckers, sapsuckers do not peck into a tree looking for insects. The sapsucker usually makes new holes in line with old holes Figure 2. Holes are approximately one-quarter of an inch in diameter. The sapsucker makes two types of holes. First is the round hole that extends deep into the tree where the bird probes for sap. After making these holes, the bird maintains shallow, rectangular holes so that sap continues to flow. The sapsucker licks sap from these holes and may even eat the cambium of the tree. Trees may exhibit holes for a number of reasons, including other woodpeckers, bark beetles, other insects, and decay. Sapsucker damage is notable because the holes are pecked close together and in rows.
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