Sprouting and flowering of plants in the spring, color changes of plants in the fall, bird migration, insect hatches, and animal hibernation are all examples of phenological events.
(color changes of plants in the fall, bird migration, insect hatches, and animal hibernation; are; all examples of phenological events)
color changes of plants in the fall, bird migration, insect hatches, and animal hibernation
are
all examples of phenological events