I saw this pine tree in Central Virginia (in the wintering range for yellow-bellied sapsuckers). So far, any yellow-bellied sapsucker wells that I've seen in winter in Virginia have been the smaller, round xylem wells. However, I think this tree looks like it has both xylem wells and the larger phloem wells. Can anyone confirm this, or does any other bird/mammal/insect/etc make something that looks similar? Also, from what I’ve read, phloem wells are made on breeding grounds after trees begin to leaf (since photosynthesis increases the sucrose content in the phloem at that point). Is it possible that sapsuckers would make phloem wells on pines even in winter since pine trees would continue with photosynthesis year-round, making the sucrose content high year-round?