This definition of spring starts when the first buds appear on trees, migratory birds return, or insects emerge from dormancy.
Many animals end their hibernation, while others begin their breeding seasons or migrations. Cultural Significance spring definition season
Longer days trigger photosynthesis in plants, leading to a sudden explosion of green across the landscape. This definition of spring starts when the first
Phenology is the study of cyclic biological events. To a gardener or a naturalist, spring isn't a date on a calendar; it’s a series of biological "firsts." migratory birds return