USA National Phenology Network is a national-scale monitoring and research initiative focused on collecting, organizing and delivering phenological data, information, and forecasts to support natural resource management and decision-making, to advance the scientific field of phenology, and to promote understanding of phenology by a wide range of audiences.

Why phenology?

Phenology is nature’s calendar—when cherry trees bloom, when a robin builds its nest and when leaves turn color in the fall. Learn why phenology is vital to many aspects of ecology and society. Phenology is also a leading indicator of climate change.

What's Happening


Creating a better forecast for invasive emerald ash borer

Ash trees on are the decline, and the main culprit is emerald ash borer (EAB), an invasive pest that has killed millions of ash trees in the United States. Knowing where and when to expect EAB emergence gives managers an advantage in controlling this pest, helping them to know whe... Read more

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Track seasonal changes in plants and animals throughout the year with Nature's Notebook.

To get started, download our Nature's Notebook app for Android or iPhone, or set up your account online.


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