USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

Spring leaf out arrived up to five days early in southern parts of Florida, Texas, Arizona, and California. Spring arrived over a week early in Death Valley. Check back on our Status of Spring page to see predictions of spring leaf out and bloom for your area.

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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

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USA National Phenology Network

News

Nature's Notebook data on red maples

National Phenology Database used in 13 publications in 2018

January 15, 2019

Observational data stored in the National Phenology Database were used in 13 peer reviewed publications last year, to identify climate drivers of flowering, validate land surface phenology, document shifts in flowering of milkweeds, and more.

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