The USA National Phenology Network

The USA National Phenology Network collects, organizes, and delivers phenological data, information, and forecasts for research and resource management.

usanpn.org
The USA National Phenology Network homepage screenshot

About The USA National Phenology Network

The USA National Phenology Network is a national-scale monitoring and research initiative. It collects, organizes, and delivers phenological data, information, and forecasts to support natural resource management and decision-making. Phenology is the study of recurring natural events, such as when plants bloom or leaves change color. The initiative also aims to advance the scientific field of phenology and to help a wide range of audiences understand it.

The homepage highlights Nature's Notebook, a program in which participants record seasonal changes in plants and animals. People can download the Nature's Notebook app for Android or iPhone or set up an account online. The homepage does not state any usage limits, eligibility requirements, or pricing.

Key features

  • Tracks the status of spring
  • Shows forecasts of pests and invasive species
  • Tracks changes in plants and animals over the year
  • Nature's Notebook app for Android and iPhone, or online account setup
  • Observer profiles describing participants' phenology monitoring work
  • Newsletter sign-up for USA NPN communications
Best for: Researchers, natural resource managers, and members of the public who want to follow the timing of seasonal events in plants and animals.
Good for
  • Offers Nature's Notebook through both a mobile app and an online account
  • Publishes observer stories that describe how participants conduct phenology monitoring

The USA National Phenology Network at a glance

Website
usanpn.org
Type
Website
Pricing
Not confirmed. Check the site
Platforms
Android, iOS, Web
Open source
Not stated
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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The USA National Phenology Network FAQ

How do I start tracking seasonal changes?
Download the Nature's Notebook app for Android or iPhone, or set up an account online.
What is phenology?
The homepage describes phenology as nature's calendar, such as when cherry trees bloom, when a robin builds its nest, and when leaves turn color in the fall.
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