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


Jake Weltzin receives Climate Adaptation Leadership Award on behalf of USA-NPN, Photo: Tim Donovan, Florida FWC

USA-NPN receives a Climate Adaptation Leadership Award

September 20, 2018

The USA-NPN's National Coordinating Office has been awarded a Climate Adaptation Leadership Award, in the Broad Partnership category, for our work reducing climate-related threats and promoting adaptation of the nation's natural resources.

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Celebrating 10 Years of the USA-NPN

10 year anniversary event

This month, we commemorate the anniversary of the USA-NPN with a reflective event at the home of our National Coordinating Office in Tucson. The event will include a symposium with speakers from the USA-NPN, Department of the Interior, and representatives from several of our partners as well as a reception with posters showcasing our Local Phenology Programs. We invite you to participate from afar by joining the livestream of presentations

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