The whole painting was lightened by adding the "white" of the cottony heads of the seed pods.
This painting was all about the bird but I learned that indigenous peoples of North America, Europe and Asia used all parts of the cattails. The shoots and other sections were cooked and eaten, the leaves used for furniture and baskets, the cottony inside for insulation and bedding, and even the pollen was collected and used as flour.
And I was just thinking the cattails made a handy perch for a bird.
Starting on the yellow-headed blackbird