Tuesday was a warm day, in the 60s, and sunny--perfect for working in the yard. My dog, Kookie, was busy chasing after chipmunks who were out that day. She chases them into their hole and then digs them out (why don't they just go up a tree?). Anyway, I just couldn't stand listening to her barking and digging, knowing that some poor little chipmunk was scared to death so I went after her.
Kookie was down in a hollow. I eased down the steep bank, using the trunk of a Sugar Maple to brace myself. That's when I realized it was completely wet. Examining the trunk, I found several holes, freshly drilled no doubt by the Yellow-Bellied Sapsucker. I tasted the water and it was faintly sweet--sap!
Later that afternoon, I went back to photograph the tree trunk but it was mostly dry. Before I approached the tree, I saw the sapsucker on a nearby hickory tree, drilling holes and somewhat annoyed at my presence.
This photo shows one hole on the sugar maple tree, about 1/4" in diameter with some sap still there. The hole is no deeper than about 1/2."
The crease on the right side of the trunk was caused by a series of holes drilled by the sapsucker in previous years. Most of the hickory trees (except shagbark) have these creases on them.
In the past, I wondered why the trunk of the Sugar Maple tree was black. Had it burned once? That's unlikely since the other trees are not black but most of the sugar maples are black, like soot. I was thinking how the whole trunk was wet from the holes so this moisture probably fosters the growth of black mildew, something like you get on bathroom tile.
The last two photos were taken on Friday, Feb. 13, and the trunk was dry again. Was it because it was a little cooler (50s) and the sap wasn't running? Or, does the sapsucker have to drill new holes to get sap every time? Perhaps someone with more knowledge of maple sugaring can help here.
When I got back to the house, I made a Valentine wreath for the birds (similar to my holiday wreath--the post has the recipe for the suet cake). I hung the wreath on a small oak tree. By the time I got back inside, a downy woodpecker had already started eating.
Here is the wreath just a few minutes later with a Yellow-Bellied Sapsucker on it. He's been there for most of the afternoon, feasting on the peanut butter suet cake in the heart shaped cookie cutters and the little mesh bags.
This White-Breasted Nuthatch has been sharing the wreath with the sapsucker.
Disaster struck the wreath yesterday. While I was on the computer, my dog, Kookie, attacked, eating both the mesh balls of suet. She bent one of the hearts, eating all of that suet. That's what I get for not putting it up out of her reach and staying on the computer too long!

Salon.com
Comments
I just love the wreath, and I bet the birds did too. I love pics from everywhere.
I dn't know a lot about the sap stains, except I bet you are right about it being mold. I would put my money on the sugar growing the mold.
It's cold today--high will be in the 30s so I have the woodstove going again.
Dogs are so darn funny and what they will eat if given half a chance.
Very interesting post.