USA NPN National Phenology Network

Taking the Pulse of Our Planet

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The USA-NPN, phenology, and our partners are often in the news. Follow some recent stories below.

Image credit:
Sara N. Schaffer


    Friday, October 27, 2017

    In a new article from the Associated Press, Weather Underground reports that 25% fewer states have had a freeze so far this fall than in normal years. A shorter freeze season means longer allergy season, longer mosquito and tick season, longer agricultural pest season, and cascading effects on plant and animal interactions.

  • USA-NPN's Start of Spring maps win Outstanding Achievement Award
    Monday, July 24, 2017

    The USA-NPN has recieved the 2017 Outstanding Achievement Award from the Renewable Natural Resouces Foundation recognizing our Start of Spring maps and access tools. These maps are based on decades of plant phenology data, and predict where spring has arrived across the country.

  • National Phenology Database Reaches 10 million record milestone
    Monday, April 24, 2017

    As of April 24, 2017, the National Phenology Database has reached 10 million 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 about this milestone in this story in UA News.  

    Find out what 10 million records means: 

  • USGS Top Story: Just HOW EARLY is spring arriving in your neighborhood?
    Thursday, February 23, 2017

    This USGS Top Story highlights why we should care about an early spring, how these predictions are calculated, and what you can do to help improve these models! 

  • Spring is arriving early in the Southeastern US
    Thursday, February 2, 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 Southeastern US. 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. You can also find out how these predictions compare to those of weather forecasting groundhog Punxsutawney Phil in article in the Washington Post and