USA NPN National Phenology Network

Taking the Pulse of Our Planet

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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

Nature's Notebook

Nature's Notebook

Join amateur and professional naturalists in regularly observing plants and animals to generate long-term data sets used for scientific discovery and decision-making.

Get started with Nature's Notebook

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USA National Phenology Network


Yale Climate Connections

New USA-NPN Phenology Observation Portal 

September 16, 2016

We've revamped the way that you download data from the National Phenology Database. The new Phenology Observation Portal is a more streamlined, user-friendly way to download customized data files by location, dates, species, phenophases or your Nature's Notebook group. 

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Observers Needed

Sara observing Photo: LoriAnne BarnettNature's Notebook on Yale Climate Connect

USA-NPN's Nature's Notebook program was recently highlighted by the Yale Center for Environmental Communication's Climate Connections podcast. Listen to two short segments in which USA-NPN's Assistant Director Theresa Crimmins talks about how participants have been tracking changes in phenology, and Web Designer Sara Schaffer talks about how she discovered her inner citizen scientist. 

Learn more about Nature's Notebook »