USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

Cool weather across the east has halted the further spread of spring leaf out, for now. In the west, spring leaf out arrived one week early in Salt Lake City, UT and two weeks early in Boise, ID.

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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


Pheno Forecast Maps

Pheno Forecast maps inform treatment timing for key pests

March 1, 2018

Our new Pheno Forecast maps show when management actions should be taken for five pest species including emerald ash borer, apple maggot, lilac borer, hemlock woolly adelgid, and winter moth. These maps are updated daily and are available 6 days in the future. Sign up to receive notifications.

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 Celebrating 10 Years of Nature’s Notebook

Julio Betancourt and Mark Schwartz

This month we celebrate the co-founders of the USA-NPN: Dr. Julio Betancourt of the US Geological Survey and Dist. Prof. Mark D. Schwartz of the University of Wisconsin-Milwaukee. Mark and Julio provided the vision for a national network to collect, store and share phenology data. Their work, combined with strong institutional support from the USGS and the University of Arizona and the collaboration of many partner organizations, has shaped the USA-NPN to what it is today.

Learn more »