This chart shows approximate nest cavity heights for each of the five species common to the Puget Sound area. There may be nest cavities found outside of the ranges listed above. The red lines indicate the height range. Typical nest cavity opening (hole) sizes are also listed.
These trees also look like what a “hab-snag” might. If a dead or dying tree is close to a building or in a dangerous position, rather than cut it down completely, it might be a good idea to have it cut to about 20-30 feet, leaving a habitat snag (or “hab-snag”) for woodpeckers to nest in. If a pair of woodpeckers decide to use it, it can make great entertainment, especially if you can see it through a window, from indoors, without disturbing the birds.