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


Walking with Wildflowers project logo

Phenology along the Pacific Crest Trail

August 13, 2018

Walking with Wildflowers, a Local Phenology Program of the USA-NPN is leveraging citizen scientists to collect data along the Pacific Crest Trail. This AAAS blog post by collaborator Nic Kooyers describes how the researchers behind this effort are working with local hikers to understand which high-elevation species may be vulnerable to shifting climatic conditions.

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Celebrating 10 Years of the USA-NPN

Poster commemorating 10 years of the USA-NPN with a four season panel design

This month we are pleased to share our 10-year anniversary commemorative poster! This poster depicts four seasons of phenological activity centered around a cottonwood tree. An observer is kneeling in a meadow, recording her observations in Nature's Notebook. The poster was created by Cara Gibson and inspired by the Works Progress Administration-style art of the 1930s. There will be several opportunities to receive your copy of the poster advertised in our newsletters this year. Sign up here

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