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


Photo: Brian F Powell

USA-NPN's Nature's Notebook featured as USGS Top Story

April 15, 2016

The US Geological Survey is celebrating National Citizen Science Day by recognizing the opportunities for everyday citizens to participate in efforts across the country. The USGS's Top Story recognizes USA-NPN's Nature's Notebook plant and animal phenology program as a way to celebrate citizen science and get outside this spring. 

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Observers Needed

Citizen Science DayNational Citizen Science Day is April 16

Saturday, April 16th, kicks of the first-ever National Citizen Science Day celebrations! This is an opportunity to celebrate the great contributions of this field and connect with others. If you are a Nature's Notebook observer, be sure to celebrate yourself! 

Learn more about Nature's Notebook »