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.

Citizen scientists plant tulip test gardens in places with different climates. Explore climate variables to predict how different conditions will affect where and when tulips emerge and bloom.

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