USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

Spring continues to arrive three or more weeks early – now making an appearance in Missouri, West Virginia, and the southern parts of Illinois, Indiana, and Ohio. Washington DC is 22 days early.

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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


Spring Index leaf anomaly 2.23.2017

Spring is arriving early across the South

February 23, 2017

According to the USA-NPN's Spring Indices, spring is arriving 20 days earlier than a long-term average (1981-2010) in much of the South and mid-Atlantic. The Extended Spring Indices are models that predict the onset of early spring plants across the United States. You can see these maps as well as maps of Accumulated Growing Degree Days (AGDD) on the USA-NPN's Phenology Visualization Tool. Read the USGS Top Story here

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Observers Needed

2016 end of year summarySee what we accomplished together in 2016

We are so amazed by your efforts in 2016, and all that we accomplished together! You submitted 2.4 million observation records to Nature's Notebook, increasing the average number of days observed per observer by 32% over 2015. You also submitted a whole lot of observations to six different Nature's Notebook campaigns, which revealed some interesting patterns. Plus, there were multiple research articles published that used your data. Watch the video summary or read the 1-pager

Learn more about Nature's Notebook »