USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

This year, spring leaf-out was 1-3 weeks late in the SE, northern Great Plains, MW, and NE and 1-3 weeks early across the central Great Plains and mid-Atlantic. The west is a patchwork of early and late arrival.  

See the maps

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


15 million records Nature's Notebook

15 million records submitted to the National Phenology Database

December 17, 2018 

We've just reached the milestone of 15 million records submitted to the National Phenology Database! These data are freely available for download and exploration in the Phenology Visualization Tool.

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Celebrating 10 Years of the USA-NPN

USA-NPN staff 2018

This month, we look ahead to the future of the USA-NPN. Here are some of the things we are cooking up for next year:

  • Pheno Forecast maps for at least five new species including buffelgrass, eastern tent caterpillar, and Asian long-horned beetle
  • Online Observer Certification Course
  • A new and improved Phenology Visualization Tool
  • and much more!

Learn more »