Join our Keynote Speaker, Mark Hineline, for "A Life in Season" on March 18, 3pm PT / 6pm ET! In this @usa-npn.bsky.social Phenology Week webinar, Mark will take you through themes that have shaped his life, including #phenology.
www.usanpn.org/news/article...
Join our director, Theresa Crimmins, this Wednesday as she discusses her book, Phenology! Theresa will be in conversation with Dr. Elise Gornish, Director of The Desert Laboratory on Tumamoc Hill.
About to add a big stripe of dark red to the @usa-npn.bsky.social maps.
Graphic showing the spring leaf index anomaly for March 3, 2026 for the contiguous United States, with spread arriving very early in central and western areas and late in the southeast.
It's been so warm for cities like Denver, Colorado that even phenological spring has arrived there according to the first leaf out! Wow!
Graphic from @usa-npn.bsky.social: www.usanpn.org/data/maps/sp...
I'm excited to join @climatecentral.org's Monthly Climate Brief on Thurs, Mar 19. We'll be talking about (surprise!) what is happening this spring and how you can get involved in tracking signs of the season. We'd love to have you join us! #phenology #statusofspring @usa-npn.bsky.social
Graphic describing the USA National Phenology Network's "Phenology Week" celebration, running Mar 16-20, 2026
The @usa-npn.bsky.social team will be celebrating #Pheology Week Mar 16-20 to coincide with the Spring Equinox. Join us for some fun and educational opportunities to celebrate the start of the spring season!
www.usanpn.org/news/article...
Map showing whether the conditions associated with springtime biological activity are being reached early or late this year. Online at https://usanpn.org/files/npn/maps/six-leaf-index-anomaly.png
All that cold the L48 recently experienced really slowed down the onset of spring. But we are starting to see things pick back up, with extra-early activity in the TX panhandle and through parts of AZ, CA, and up the west coast
#statusofspring
www.usanpn.org/data/maps/sp... @usa-npn.bsky.social
To watch the progression of spring across the country, check out our spring forecast maps - updated daily!
usanpn.org/data/maps/sp...
According to predictions from NOAA's Climate Prediction Center, Phil may be right for parts of the Northern Great Plains - more cool temperatures are on the way! Much of the SW and SE should see above-avg temps in coming weeks and the NW, MW, and NE should see avg temps.
Our maps of heat accumulation provide a more scientific look at how much heat has accumulated so far this year. Our maps show that heat accumulation is ahead of schedule in much of the west, on time in the Midwest and upper Northeast, and behind schedule in the East.
Groundhog day graphic showing a map of the US with accumulated temperature accumulation, icons denoting Nature's Notebook observations of leaf out and flowering, and forecasts of weather from NOAA.
Punxsutawney Phil has made his annual prediction of what the next six weeks of weather will bring. According to Phil, more winter is on the way! But what does the science say? #GroundhogDay
Keep track of Spring's arrival:
usanpn.org/data/maps/sp...
PollenCAST project logo
Male Ashe's juniper (Juniperus ashei) tree by Mike Murphy via iNaturalist (CC-BY-NC).
Cedar fever got you feeling crummy? @usa-npn.bsky.social is collecting of Ashe's juniper pollen development and release through the NASA-funded PollenCAST project! Your observations of when junipers release pollen in TX will support real-time forecasts of airborne pollen usanpn.org/nn/campaigns...
This work by @usa-npn.bsky.social @theresacrimmins.bsky.social strengthens the natural history community and builds our knowledge of organisms' responses to environment.
It is an outstanding resource to scientists, educators, naturalists, and enthusiasts of all stripes.
And we can all contribute!
USA National Phenology Network 2025 annual report highlight on how we advanced science via the development of the Late Bloom Index map.
USA National Phenology Network 2025 annual report highlight on the winners of the PhenoChampions award, Mount Auburn Cemetery Citizen Scientists.
USA National Phenology Network 2025 annual report letter from the director.
USA National Phenology Network 2025 annual report infographic on participant and data metrics.
Our 2025 Annual Report is here! Below, excerpts from the report including a Letter from our Director,
@theresacrimmins.bsky.social, and highlights of #phenology
accomplishments made possible by our partners and observers!
Read the full 2025 Annual Report at www.usanpn.org/files/npn/re...
excited to hear about the new @usa-npn.bsky.social Nature's Notebook app! phenophase definitions and reference images, new funcationality for advanced traits, adding photos, geolocation tags...and more! #NPNLPLconference #makinguphashtags
map showing early start to conditions associated with the start of biological activity in the spring in the Lower 48 states of the US
And we're off! Spring has started to arrive in the most southern states, and in parts of TX, LA, and MS, it's >two weeks earlier than "normal" (the last 3 full decades).
I feel like a broken record, we say this nearly every spring...
#phenology @usa-npn.bsky.social
usanpn.org/data/maps/sp...
Great National Phenology Network conference on local phenology leaders going on this week online. Really enjoying and learning new ideas from the talks so far! usanpn.org/community/Lo... @usa-npn.bsky.social
map of predicted anomaly in start of spring
Awesome @usa-npn.bsky.social partners Toby Ault and Carlos Carillo at @cornelluniversity.bsky.social released their long-lead forecast for spring; they are predicting a pretty early start to springtime activity in much of the U.S.
six-ecrl-24.s3.amazonaws.com/index.html #phenology
There’s still time to register for our free Local Phenology Leader Virtual Conference happening Tuesday - Friday next week!
Meet our speakers, check out the schedule, and register:
usanpn.org/community/Lo...
Calling #NaturesNotebook participants! We have an opportunity for 18 observers to be interviewed by undergraduate students at UCLA this spring. The observer profiles will be featured on the @usa-npn.bsky.social website and in future newsletters.
Interested? docs.google.com/forms/d/e/1F...
We're looking forward to sharing them with you!
⏰One week left to sign up to share about your Program at the 2026 LPL Virtual Conference!
View the full schedule, learn how you can participate, and register today. usanpn.org/community/Lo...
📷Lili Gama
Registration is open for the 2026 Local Phenology Leader Virtual Conference! Connect with fellow LPLs, get updates about the new Nature’s Notebook app, hear from phenology experts, and more.
View the full schedule, learn how you can participate, and register today.
usanpn.org/community/Lo...
Exciting news - We’re hosting the first annual Local Phenology Leader Virtual Conference the week of January 20-23, 2026!
We want you to help shape the agenda! 🌿
Tell us what sessions, speakers, or activities you’d love to see:
forms.gle/S1bhDUHJT5aV...
Thanks for alerting us to this bug, @drrambio.bsky.social! The Observed Day of Onset is correct, but it shouldn't show as "144 days late." We'll fix that. The 9 days early is correct for the basemap, which is the Spring Index Leaf Anomaly. More info on the basemap at usanpn.org/data/maps/sp...
A badge with people, a bird, leaves, and a flower with a banner that reads Nature's Notebook Certified Local Phenology Leader.
Applications now open for our Local Phenology Leader Certification Course, an interactive, online 10-week course on planning and implementing a long-term phenological monitoring program for your organization or community. Course runs Sep 29-Dec 5. Apply by Sep 21. www.usanpn.org/nn/LPLCertif...
2024 “first leaf” date anomalies across the United States relative to (a) 2023 and (c) the 2011–20 baseline, estimated using the USA National Phenological Network (USA NPN) extended Spring Index (SI-x) model (
Day of year of spring (green shades) and autumn (orange and yellow) vegetation phenology indicators for (a),(b) Harvard Forest, Massachusetts, derived from PhenoCam (PC), ground observations (GO) of red oak (Quercus rubra), and the USA National Phenology Network (USA NPN) regional-scale means of red oak observations (calculated across the northeastern states of Pennsylvania, New Jersey, New York, Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire, and Maine, with ±1 std. error shaded)
The 2024 #BulletinAMS State of the Climate Assessment is out today. @usa-npn.bsky.social contributed data & info about how #phenology is changing in the U.S. The timing of plant and animal activity such as leaf-out is a strong indicator of species and ecosystem response to changing conditions.
Every March I end up on the phone with Theresa Crimmins of the @usa-npn.bsky.social National Phenology Network talking about the advent of spring. So when she said she wrote a book, I had to get it and add it to my summer list of books by people I know: www.barnesandnoble.com/w/phenology-...
Now, as always, getting outside is good for you and your mood. Thankful for the opportunity to write for Arizona Daily Sun. #phenology
azdailysun.com/opinion/colu...
@jeremyclark.bsky.social helped the @usa-npn.bsky.social explore options for generating commercial revenue.
It's tough for programs exist to serve the public. I hope our experience can help other programs suddenly struggling with $ loss.
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
