Discover and Document Changes in Nature Near You

Track changes in the timing of plant and animal seasonal activity with the Nature's Notebook program. See what it’s like to be a Nature’s Notebook observer in this video from our partners at Audubon Starr Ranch:

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Nature's Notebook Campaings focus on species of particular interest to researchers and natural resource managers. Find a campaign near you to join!


View Species

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Sugar Maple
Acer saccharum
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Common Milkweed
Asclepias syriaca
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Allen's hummingbird
Selasphorus sasin
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American Bullfrog
Lithobates catesbeianus
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Hexagenia spp.
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Creosote bush
Larrea tridentata

Bring Phenology to your Classroom

Explore our phenology-focused lesson plans for grade levels from Kindergarten to Post-secondary, and learn how you can use Nature's Notebook with your students.

Learn How Your Data Are Used

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Male and female trees are responding differently to increasing temperatures

Tue, Mar 12, 2024

Dioecy, defined as distinctly male or female individuals in a species, is uncommon in plants, occurring in only about 5% of species. Consequently, our understanding of how this group of plants is being affected by climate change is limited. A group of researchers based at Purdue University in Indiana, USA asked two questions: 1) is the synchronicity in flowering in male and female trees changing? and 2) is the timing of leaf-out and flowering changing at different rates? The researchers found that male trees are advancing their flowering time at a greater rate than female trees. This is potentially bad news for these species; this pattern could reduce pollen transfer from male to female trees and negatively impact reproductive success in these trees. The researchers also found that flowering, which occurs before leaf-out in the species evaluated in this study, is advancing more rapidly than leaf-out. This finding is good news; the increasing temporal gap between flowing and leaf-out means less interference for the transfer of pollen from male to female trees.

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Precise, local predictions of grassland bird nest timing

Thu, Nov 30, 2023

Grasslands are among the most disturbed ecosystems globally. In the areas that remain, managers must balance practices such as mowing and burning that maintain natural systems while avoiding nesting periods for grassland birds. The authors of this study used information about nest survival from scientific literature as well as climate information and the USA-NPN’s Spring Bloom Index to develop models to predict the expected nest departure timing for 36 grassland bird species. This information can provide more localized information about nesting timing to better time management actions to avoid this critical period.

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Creating a better forecast for invasive emerald ash borer

Fri, Sep 15, 2023

Ash trees on are the decline, and the main culprit is emerald ash borer (EAB), an invasive pest that has killed millions of ash trees in the United States. Knowing where and when to expect EAB emergence gives managers an advantage in controlling this pest, helping them to know when to take actions to control the pest. In this article, Barker et al. evaluated a model that predicts activity of EAB, taking into account both phenology and locations that have suitable climate for this pest. They used observations of EAB, including those from Nature’s Notebook, to test their model and found that it correctly estimated over 99% of presence records and predicted dates of adult EAB emergence within 7 days. This paper demonstrates how your observations can be used in the realm of invasive species, helping to improve management and ultimately conserve the unique ecosystems that we care about.

Explore the Glossary

See definitions of terms used in descriptions of plant and animal phenophases.