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


  • Fall leaf out and flowering in lilacs
    Tuesday, November 16, 2021

    Some of our Nature' Notebook observers are reporting late season leaf out and flowering in lilacs this year. How uncommon is this late season phenology? Not too unusual, as the map below shows.

    Lilac fall leaf out and flowering 2021

  • Additional rainfall data added to Buffelgrass Pheno Forecast
    Wednesday, July 14, 2021

    Each summer, we deliver a Buffelgrass Pheno Forecast to aid managers in knowing where and when invasive buffelgrass is green across Southern Arizona. The forecast is based on known precipitation thresholds for triggering green-up to a level where management actions are most effective. In 2021, we added weather station-based forecasts of buffelgrass green up to the gridded forecasts to provide managers with additional data about rainfall. This additional information is available in the Visualization Tool. We also have 12 other Pheno Forecasts on a variety of insect pests.

    Buffelgrass Pheno Forecast with station data

    Tuesday, February 2, 2021

    Punxsutawney Phil predicted six more weeks of winter! However, our maps of heat accumulation provide a more scientific look at how much heat has accumulated so far this year, and what's next. Heat accumulation is ahead of schedule in the Southeast and parts of the West and Great Plains, behind schedule in other parts of the West and southern Midwest states. NOAA's Climate Prediction Center predicts warmer than average temperatures and lower than average precipitation in the Southwest and Southeast, below average temperatures and above average precipitation in the Northwest, and above average temperatures and above average precipitation in the Midwest and Northeast. 

    Groundhog day seasonal story graphic 2021

    And Nature's Notebook observers are already seeing early spring activity including breaking leaf buds, initial growth, and open flowers on several species across the country. Explore which species are showing activity in the dashboard below.

  • Unusual Bloom Timing this Fall
    Friday, December 18, 2020

    Nature's Notebook observers reported some oddly-timed flowering for species across the country this fall. This great article from Yale Climate Connections discusses some causes of fall flowering including drought, heatwaves, and other stressors. According to, this fall was the warmest on record in some locations.

    Explore the data »

    Winter Seasonal Story 2020

  • Fall colors in maples, oaks and poplars across the US
    Monday, September 21, 2020

    Hundreds of Nature's Notebook observers across the country are tracking the fall leaf color of plants including maples, oaks, and poplars. On our map below, you can see that while there is a range in the start of fall leaf color in all regions this year.

    Explore the data in our Visualization Tool »

    Fall Seasonal Story 2020