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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

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Observer Profile: An interview with Caryn Beiter

In this Observer Story written by UCLA student Audrey Wang, we learn about Nature's Notebook observer Caryn Beiter. Caryn is a long-time Local Phenology Leader at the Wells National Estuarine Research Reserve in Maine, where she seeks to provide opportunities for community members to co... Read more

Download Nature's Notebook

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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