USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

Spring leaf out is spreading north through Southwest and Southeast states. Spring is 10 days early in Charlotte, NC and 15 days early in Nashville, TN.

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The USA National Phenology Network

The USA National Phenology Network

We bring 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. Learn more about the USA-NPN

What is Phenology?

What is Phenology?

Phenology refers to key seasonal changes in plants and animals from year to year—such as flowering, emergence of insects and migration of birds—especially their timing and relationship with weather and climate.

Learn more about phenology

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USA National Phenology Network


2019 heat accumulation vs groundhog prognostication

Did the groundhog get it right this year?

February 2, 2019

Punxsutawney Phil predicts an early spring this year. Our map of accumulated growing degree days shows he may be right, for parts of the country anyway. Heat is accumulating faster than normal across much of the West and Southeast this year. See what Nature's Notebook observers are already reporting on plants and animals across the country.

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