USA - National Phenology Network

USA - National Phenology Network We promote a broad understanding of plant and animal phenology and its relationship with environmental change. Join us to document how things are changing!

The USA National Phenology Network brings 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 by encouraging them to observe phenological events like leaf out, flowering, migrations, and egg laying, and by providing a place for people to enter, store, and share th

eir observations. The network harnesses the power of people and the Internet to collect and share information, providing researchers with far more data than they could collect alone. We also work with researchers to develop tools and techniques to use these observations to support a wide range of decisions made routinely by citizens, managers, scientists and others, including decisions related to allergies, wildfires, water, and conservation.

Happy Earth Day! Phenology is an incredibly important resource in helping to understand and restore Earth's ecosystems. ...
04/22/2026

Happy Earth Day! Phenology is an incredibly important resource in helping to understand and restore Earth's ecosystems. Help us celebrate by checking on one of your plants or animals in Nature's Notebook and making some observations today! 🌎🌱

Join our director Theresa Crimmins on at the Tumamoc Hill Boathouse on April 18th for her Youth Program session! She'll ...
03/31/2026

Join our director Theresa Crimmins on at the Tumamoc Hill Boathouse on April 18th for her Youth Program session! She'll be discussing signs of spring in the Sonoran Desert, and there'll be an opportunity to make a desert flower mural using origami flowers. This event is free for kids of all ages and their caregivers, so be sure to stop by!!

Thank you for joining us for Phenology Week! This Friday, we challenge you to create your own phenology wheel that you c...
03/20/2026

Thank you for joining us for Phenology Week!

This Friday, we challenge you to create your own phenology wheel that you can use to track phenology throughout the year. An example phenology wheel is provided, but we encourage you to design your phenology wheel in any way you would like! If you would like to share your phenology wheel with us, please use the hashtag and will share your post!

Image credits: Courtesy of Marianne Lancaster

We’re celebrating Phenology Week! 🦋This Thursday, we challenge you to find an animal showing flower visitation and obser...
03/19/2026

We’re celebrating Phenology Week! 🦋

This Thursday, we challenge you to find an animal showing flower visitation and observe it in Nature’s Notebook. Flower visitation is commonly observed in many bird and insect species, such as the giant swallowtail pictured. If you take a picture of an animal, draw it, or capture it another way, share what you have with the hashtag and will share your photos throughout the week!

Image credits: Flower visitation by Dulcey Lima Photography (CC BY-NC-SA 4.0)

We are thrilled to announce our 2025 PhenoChampions, The Bloomingdale Trail Phenology Program! The Program’s dedicated t...
03/18/2026

We are thrilled to announce our 2025 PhenoChampions, The Bloomingdale Trail Phenology Program! The Program’s dedicated team tracks autumn brilliance serviceberry phenology along the Bloomingdale Trail, an elevated park running through Chicago.

The Bloomingdale Trail Phenology Program is a shining example of both rigorous data collection and dedicated community engagement. In 2025, volunteers developed a community-created serviceberry cookbook, designed a tree guide, led educational walks, participated in pop-up events along the trail, and even got an article about their Program in a local Chicago paper.

Read more about the 2025 PhenoChampions here: https://www.usanpn.org/community/LocalPhenologyPrograms/PhenoChampion

We’re celebrating Phenology Week! 🍓This Wednesday, we challenge you to find a plant showing a fruiting phenophase. It ma...
03/18/2026

We’re celebrating Phenology Week! 🍓

This Wednesday, we challenge you to find a plant showing a fruiting phenophase. It may be tricky finding fruits at this time of year. Try to find a fruit on any plant, but if you find fruit for one of your Nature’s Notebook plants, don’t forget to report it there too! Fruiting phenophases include fruits and ripe fruits. Examples for Virginia strawberry are provided, but if you need help identifying which phenophase your plant’s fruits are in, you can find phenophase definitions and guides for species on the USA-NPN website (link in bio). If you take a picture of your plant, draw it, or capture it another way, share what you have with the hashtag and will share your photos throughout the week!

Image credits: Fruits and ripe fruits by Ellen G. Denny (CC BY-NC-SA 4.0) (cropped)

We're excited to share a series of interpretive writing pieces created by high school students about their experiences t...
03/17/2026

We're excited to share a series of interpretive writing pieces created by high school students about their experiences tracking phenology with Nature's Notebook!

Students in Dr. Ava Goodale’s Environmental Science Research Course at Deerfield Academy collected environmental data as volunteer scientists, analyzed those data in a technical report, and created an interpretive writing piece that tells a story about their experience. The students featured in this series participated in Nature’s Notebook campaigns and were kind enough to share their writing with us. Read more from Eleanor, Henry, and Chuck on our website!

We’re celebrating Phenology Week! 🌸This Tuesday, we challenge you to find a plant showing a flowering phenophase and obs...
03/17/2026

We’re celebrating Phenology Week! 🌸

This Tuesday, we challenge you to find a plant showing a flowering phenophase and observe it in Nature’s Notebook. Flowering phenophases include flowers or flower buds and open flowers. Examples for purple milkweed are provided, but if you need help identifying which phenophase your plant’s flowers are in, you can find phenophase definitions and guides for species on the USA-NPN website (link in bio). If you take a picture of your plant, draw it, or capture it another way, share what you have with the hashtag and will share your photos throughout the week!

Image credits: Flowers or flower buds and open flowers by Dulcey Lima Photography (CC BY-NC-SA 4.0)

We’re celebrating Phenology Week with the USA-National Phenology Network! 🌱This Monday, we challenge you to find a plant...
03/16/2026

We’re celebrating Phenology Week with the USA-National Phenology Network! 🌱

This Monday, we challenge you to find a plant showing a leaves phenophase and observe it in Nature’s Notebook. Leaves phenophases include breaking leaf buds, young leaves, increasing leaf size, and leaves. Examples of each phenophase for American witch-hazel are provided, but if you need help identifying which phenophase your plant’s leaves are in, you can find phenophase definitions and guides for species on the USA-NPN website (link in bio). If you take a picture of your plant, draw it, or capture it another way, share what you have with the hashtag and will share your photos throughout the week!

Image credits: Breaking leaf buds and increasing leaf size by Ellen G. Denny (CC BY-NC-SA 4.0) (cropped), leaves by Dulcey Lima Photography (CC BY-NC-SA 4.0) (cropped)

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