About Us

USA National Phenology Network (USA-NPN) supports science, natural resource management, and communication by providing data, tools, and resources and by connecting people.


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.




The USA-NPN collects, organizes, and shares phenological data and information to aid decision-making, scientific discovery, and a broader understanding of phenology from a diversity of perspectives.


Providing data and information on the timing of seasonal events in plants and animals to ensure the well-being of humans, ecosystems, and natural resources.


The USA-NPN consists of a National Coordinating Office (NCO), thousands of volunteer observers and many partners, including research scientists, resource managers, educators, and policy-makers. Anyone who participates in Nature’s Notebook or collaborates with NCO staff to advance the science of phenology or to inform decisions is part of the USA-NPN.

Our Sponsors




We take pride in delivering high-quality products and setting the standards within the field. We invest the time necessary to ensure that what we develop is accurate, thorough, and consistent. We seek and rely on input from our many, diverse partners to define and shape these products, recognizing the strength of many minds and cultures.


We work closely with others. We listen carefully and respectfully to the needs and thoughts of our partners, participants, and stakeholders from various cultural frameworks, and use their input to shape our activities, products, and priorities. We recognize that being more inclusive and welcoming makes us stronger. We are committed to deeper consideration of equity in all aspects of our work.


We push boundaries in the work we undertake, often forging ahead of others. Our work is original and interdisciplinary. We think creatively. We are not afraid of failure. We learn from our mistakes and rapidly adapt. We recognize that diverse perspectives and different ways of thinking about a problem lead to stronger and bolder solutions.

Learn More About The USA-NPN


Our staff

The USA-NPN's National Coordinating Office (NCO) guides the development of the Network, facilitates communication between scientists, land managers, policy-makers, and the public who are interested in assessing the effects of global change on natural ecological systems. Staff members are employees of The University of Arizona.