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

Phenology and Climate Change

Phenology and Climate Change

The ways in which the world is responding to climate change are not well understood. Phenology is a great indicator of current and future climate impacts on people, plants, animals and our natural areas.

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.

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USA National Phenology Network


Bee visiting flower
National Pollinator Health Strategy Released

May 20, 2015

The USA-NPN is proud to be a part of the National Strategy to Promote the Health of Honey Bees and Other Pollinators, just released by the interagency task force charged with this effort. The Strategy outlines needs and actions to better understand pollinator losses and improve pollinator health, and highlights citizen science, the USA-NPN's phenology monitoring protocols, and our collaboration with the US Fish & Wildlife Service's National Wildlife Refuge System.

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Observers Needed

Botany PrimerNature's Notebook Botany Primer now available

Nature's Notebook observers have a new resource to confidently use the USA-NPN observation proctocols. This colorful, information-rich document is intended for a wide audience and available for download. Interested in a printed and bound copy?

Find out more about Nature's Notebook »