Report your day length for the equinox, September 22nd. Are days and nights equal on the equinox everywhere on Earth?

 

Explore how animals in different places respond to seasonal change.

• Viewing Guide for all species

Presented by Explore.org

Overview

Phenology is the study of the seasonal timing of life cycle events. You are studying phenology when you record the date a certain plant grows, a tree's leaves emerge, an insect hatches, or a migratory bird appears on its nesting grounds. Factors such as daylength, temperature, and rainfall influence the dates on which events occur each year.