BY LESLIE REGO
I think knots give a tree a lot of character. In most cases, knots are formed by the natural growth of the tree. As a tree increases its girth, the trunk begins to overtake some of the branches along its length. Interesting shapes and bulges form around these branches, slowly turning into a knot. In this way a tree can create many natural knots. Generally, if the branch is still growing as the knot forms, the knot will be composed of living wood and will be pretty tough.
If a branch becomes injured or dies while still attached to a tree, a loose knot will form as the circumference of the tree increases. The center of these knots does not have living wood but, rather, decayed material. This decayed matter can easily fall out or be removed, leaving an empty hole. These knots become perfect cavities for a bird’s nest.
I saw one the other day lined with soft grass and twigs, the inhabitants long gone. I am not sure what type of bird used this particular knot as its home. The opening was about 3 inches across, which would perhaps suggest a white-breasted nuthatch. These birds nest almost exclusively in natural cavities. They also like to line the openings. The knot I came across was beautifully appointed, with the grasses and twigs encompassing the round interior.
I love that nature is so cyclical. One thing dies, which allows for something else to flourish. This nest will most likely be used many more times––a built-in home for generations to come.
Leslie Rego is an Idaho Press Club award-winning columnist, artist and Blaine County resident. To view more of Rego’s art, visit leslierego.com.