Spring season normally starts at this time of year on what is known as the Vernal Equinox, (or near March 21 in the northern hemisphere). This is when night and day are both nearly the same length. Astronomically this is due to the crossing moving northward, marking the first day of spring. As this season approaches, we wait in anticipation of warmer weather when new plants start appearing, we watch for the arrivals of many of our spring migrating birds, as well as observe the emergence of insects and changes in many animal behaviors. Also, for the most part, temperatures are beginning to show a gradual departure from winter's hold, and in warmer regions, we see a gradual appearance of nature's spring flowers and plants.