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.

Get started with Nature's Notebook

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USA National Phenology Network


Image credit: Brian F Powell
Join us for the 8th Annual PROSE Symposium

September 1, 2015

THe 8th Annual Phenology Research and Observations of Southwest Ecosystems (PROSE) Symposium is now accepting paper and poster submissions. The Symposium will be held on Friday, October 16th at the University of Arizona (Tucson) Campus. This year PROSE will also kick off the USA-NPN Phenology Days Celebration!   

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Observers Needed

mayfly, Photo: Alan StankevitzTrack the emergence of mayflies this summer

Mayflies can emerge in the millions, numbers large enough to appear on weather radar! The US Fish & Wildlife Service is teaming up with Nature's Notebook to track the large-scale emergence of mayflies along the Upper Mississippi River this summer. Find our more about how you can join Mayfly Watch.

Find out more about Nature's Notebook »