USA NPN National Phenology Network

Taking the Pulse of Our Planet

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USA National Phenology Network

The USA-NPN brings together citizen scientists, government agencies, non-profit groups, educators and students of all ages to monitor the impacts of climate change on plants and animals in the United States.
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WHAT’S NEW AT USA-NPN

March 20th, 2019

In places where spring has sprung, how typical is this year’s spring? The USA-NPN's spring leaf out shines light on where leaf out of early season plants has occurred across the country. In the map at left, darker colors represent springs that are unusually early or late in the long-term record. Gray indicates an average spring.

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