USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

Spring was early across much of the US in 2017, arriving 2-3 weeks earlier than a long-term average in the South, Great Basin, Great Plains, Midwest and mid-Atlantic. Many parts of west coast states and small portions of the east coast were 1-3 weeks late.

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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


10 million records Prezi

National Phenology Database reaches 10 million records

April 24, 2017

The National Phenology Database, which contains records submitted through USA-NPN's Nature's Notebook program, as well as historical cloned lilac data, has reached 10 million phenology records. Each record is a response to a question about phenology activity for a particular plant or animal species on a unique day and time, by a unique observer. Read more in this story in UA News. We invite you to explore the data or become a Nature's Notebook observer to help to grow the database!   

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Observers Needed

Nectar Connectors badgeSpring campaigns are here!

Nature's Notebook
 are a great way to learn about the phenology of species of special interest, and see how the timing of their phenology changes over time. By collecting data for these campaigns, you also contribute to important scientific research! This year we have a new campaign, Nectar Connectors, that focuses on species of special importance to pollinators. Visit the individual campaign pages to find out how to participate.

Learn more about Nature's Notebook »