A: As a tree gets older, the woody tissue of the trunk and limbs divides into two zones: heartwood and sapwood. Heartwood cells usually contain tannins or other substances that make it dark ...

Question: We have a large 60+ foot mulberry tree in our backyard that is located by our pond. This is the first year I have seen these dark streaks on the bark of the tree. Should I have concerns?

4. If a light-coloured moth lands on the dark tree trunk set it aside. It’s been eaten by a bird! The same goes for dark moths which land on the light tree trunk. If they didn’t land on a tree, the ...