Our days become shorter and our nights longer as we greet the autumnal equinox on Sunday, Sept. 22. This is the first calendar day of fall, though we have already felt the change in the air. Mornings especially have a crisp coolness. Extra high tides at over six feet in the afternoon accompany the equinox.

One of the last shrubs to bloom, coyote brush, is now covered with small puffs of yellow fuzz. The female…