USA NPN National Phenology Network

Taking the Pulse of Our Planet

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The USA National Phenology Network

The USA National Phenology Network

We bring together citizen scientists, government agencies, non-profit groups, educators and students of all ages to monitor the impacts of climate change on plants and animals in the United States. Learn more about the USA-NPN

What is Phenology?

What is Phenology?

Phenology refers to key seasonal changes in plants and animals from year to year – such as flowering, emergence of insects and migration of birds – especially their timing and relationship with weather and climate.

Learn more about phenology

Phenology and Climate Change

Phenology and Climate Change

The ways in which the world is responding to climate change are not well understood. Phenology is a great indicator of current and future climate impacts on people, plants, animals and our natural areas.

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USA National Phenology Network

News

Spotted salamander on mossy rock.
Recent Changes in Phenology Across the United States

March 15, 2013

New USA-NPN information sheets synthesize recent changes in climate and phenology in eight U.S. regions. Find out what changes have been observed in salamanders in the Southeast, caribou in Alaska, ragweed in the Great Plains and more.

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Observers Needed

Join a Nature's Notebook Campaign

This spring you can participate in a growing national program to understand how plants and animals are responding to climate change. We're focusing on lilacs, dogwoods and deciduous trees.

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