USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

This year, spring leaf-out was 1-3 weeks late in the SE, northern Great Plains, MW, and NE and 1-3 weeks early across the central Great Plains and mid-Atlantic. The west is a patchwork of early and late arrival.  

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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

News

Fall 2018 Seasonal story of leaf color reports

When did observers report fall color this year?

November 20, 2018 

Nature's Notebook observers' reports of 50% of more leaf color for Green wave species show consistent patterns with the timing of vegetation brown-down as estimated via the satellite-based MODIS sensor (base map courtesy of J. Gray, M. Friedl and D. Sulia-Menashe 2018).  

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Celebrating 10 Years of the USA-NPN

2017 USA-NPN annual report cover

This month, we take a look back at the many accomplishments of the Network over the last 10 years. Our Annual Reports capture stories of how Nature's Notebook data are advancing the field of phenology, how decision makers use USA-NPN data and data products to make more effective decisions, and how Local Phenology Program partners engage local communities in meaningful citizen science experiences. You can explore these stories in our archive of past Annual Reports.

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