USA NPN National Phenology Network

Taking the Pulse of Our Planet

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Status of Spring

Status of Spring

Spring was early across much of the US in 2017, arriving 2-3 weeks earlier than a long-term average in the South, Great Basin, Great Plains, Midwest and mid-Atlantic. Many parts of west coast states and small portions of the east coast were 1-3 weeks late.

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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


Observer with oak tree Photo Brian F Powell

First frost is late across much of the country 

October 27, 2017

In a new article from the Associated Press, Weather Underground reports that 25% fewer states have had a freeze so far this fall than in normal years. A shorter freeze season means longer allergy season, longer mosquito and tick season, longer agricultural pest season, and cascading effects on plant and animal interactions.    

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Observers Needed

Nectar Connectors badgeTrack flowering of plants for pollinators

This fall, you can help monarchs and other pollinators by documenting fall flowering of milkweeds and other important nectar species! Join the Nectar Connectors campaign, and collect data that will help the US Fish and Wildlife Service and other managers know where and when nectar is available for pollinators such as monarchs as they make their way south this autumn.

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