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Theresa Crimmins @theresacrimmins.bsky.social · 17d

www.nbcnews.com/science/clim... #phenology

Bright, brief and early: New England's fall foliage may not last long

A season that draws millions of tourists and billions of dollars to the Northeast may be briefer and less predictable this year as climate change reshapes the iconic fall landscape.

www.nbcnews.com

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Theresa Crimmins @theresacrimmins.bsky.social · 18d

Amazing interview with Amanda Wanlass, Executive Director of Indiana #Phenology! www.wishtv.com/beo-show/loc...

Local Group Helps Track Seasonal Changes in Plants and Animals

The team at Indiana Phenology travels the state, helping small businesses, teachers, and community groups learn how to track important seasonal changes in the environment.

www.wishtv.com

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Theresa Crimmins @theresacrimmins.bsky.social · 18d

I had such a great time at the Colorado Native Plant Society meeting this past weekend! Made some great friends and enjoyed seeing some glimpses of fall color 🍂#phenology

honey locust with leaves starting to change color

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USA National Phenology Network @usa-npn.bsky.social · 25d

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...

A badge with people, a bird, leaves, and a flower with a banner that reads Nature's Notebook Certified Local Phenology Leader.

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Theresa Crimmins @theresacrimmins.bsky.social · Aug 14

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.

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)

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Theresa Crimmins @theresacrimmins.bsky.social · Aug 6

That's awesome! Thanks, Brian!

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Theresa Crimmins @theresacrimmins.bsky.social · Jul 18

Hooray @lpzoo.org! Congrats on 5 years of #phenology observations on native hibiscus!
www.lpzoo.org/phenology-an...

Phenology and Flowers: Researching the Growing Cycles of Plants | Lincoln Park Zoo

An project studying the growing cycles of plants has been going on at Lincoln Park Zoo for five years—and is poised to expand for the next five.

www.lpzoo.org

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Theresa Crimmins @theresacrimmins.bsky.social · Jul 13

They sure are!

Theresa Crimmins @theresacrimmins.bsky.social · Jul 9

Thank you so much, Michelle Sutton, for the wonderful review of my book, _#Phenology_, in City Trees Magazine! read.dmtmag.com/i/1537178-ju...?

City Trees - July/August 2025

City Trees is a premier publication focused on urban + community forestry. In each issue, you’ll learn how to best manage the trees in your community and more!

read.dmtmag.com

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Theresa Crimmins @theresacrimmins.bsky.social · Jun 20

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...

Spotlight on Climate: Moments in nature can still soothe your climate-weary soul

And just like that, spring is behind us. The first day of summer will be here this weekend. But around the state, we are lacking some of the classic harbingers

azdailysun.com

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Theresa Crimmins @theresacrimmins.bsky.social · Jun 14

@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/...

agupubs.onlinelibrary.wiley.com

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Theresa Crimmins @theresacrimmins.bsky.social · Jun 12

It's not uncommon for spring to start out early and then slow down, or vice-versa... see where either of those sequences of events occurred in the L48 states this past spring:

www.climate.gov/news-feature...

#phenology @usa-npn.bsky.social @climate.noaa.gov

First blooms of the 2025 spring season were earlier than average across most of the United States

According to a long-term index of flower timing, most U.S. areas saw flowers emerge earlier than average, except for a few, mostly coastal areas.

www.climate.gov

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Natural History Institute @nhi-prescott.bsky.social · May 16

Join us for a talk by Theresa Crimmins on how we can all participate in documenting the timing of seasonal life cycle events—with benefits including mental health and supporting climate change action!
@theresacrimmins.bsky.social
@usa-npn.bsky.social

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Theresa Crimmins @theresacrimmins.bsky.social · May 16

Today I got to witness a 5' gopher snake devour a young dove right from the nest - wow! #nature

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MIT Press @mitpress.bsky.social · May 3

No need to dig for your next read: @empressofdirt.bsky.social provides recommendations from her #garden and #nature bookshelf, including "Phenology" by @theresacrimmins.bsky.social and "The Urban Naturalist" by @schilthuizen.bsky.social:

What I’m Reading: Gardening, Nature, & Life Stories — Empress of Dirt

If you’re looking for gardening and nature books that explore how the outdoors shapes our lives (and vice versa), this is a growing list of titles I’m reading, enjoying, and recommending, covering…

empressofdirt.net

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Theresa Crimmins @theresacrimmins.bsky.social · May 2

Hi Henricus, it's been a while! good to reconnect!

Theresa Crimmins @theresacrimmins.bsky.social · Apr 30

Ooooh! Thanks for clarifying :)

Great question! Best bet is to preserve as much detail as you can - for example, rather than only retaining the date you first saw something if you also have dates you *didn't* see something, retain both. Would be happy to have a chat about this, if it would help!

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 29

Yes you can download raw data from this tool: data.usanpn.org/observations...

And for the API-friendly folk, we have an R package (rnpn) and APIs for accessing our data too - more here: www.usanpn.org/data/code

data.usanpn.org

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 29

Good question! All #phenology observations contributed to #NaturesNotebook are readily available! You can explore via a visualization tool: data.usanpn.org/vis-tool/#/ or download through an online query tool: data.usanpn.org/observations...

NPN Visualization Tool

data.usanpn.org

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 27

Really nice to have @empressofdirt.bsky.social mention my book, #Phenology, on her spring book list! Thank you! empressofdirt.net/reading/

What I’m Reading: Gardening, Nature, & Life Stories — Empress of Dirt

If you’re looking for gardening and nature books that explore how the outdoors shapes our lives (and vice versa), this is a growing list of titles I’m reading, enjoying, and recommending, covering eve...

empressofdirt.net

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 24

Great piece on @npr.org about #phenology and how it is changing
www.npr.org/2025/04/22/1...

Flowers and trees are blooming earlier. Is it because of climate change? : Short Wave

Welcome!! This is the first episode of Nature Quest, a monthly Short Wave segment that answers listener questions about your local environment. This month, we hear from a listener in California who's ...

www.npr.org

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 22

Fun story on Arizona Illustrated about how Covid helped a lot of us get outside and connect with nature more (a useful approach to take now as well!): tv.azpm.org/p/zfeature/2...
@azpm.bsky.social

Lessons From Lockdown: How COVID Changed Our Relationship To Nature - Arizona Illustrated

How COVID Changed Our Relationship To Nature.

tv.azpm.org

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 14

I would be honored and delighted to talk about anything #phenology -related!

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 12

Thanks for digging this out of the archive! #phenology

Cliff Crego @cliffcrego.bsky.social · Apr 12

#phenology LISTENING: Is Spring Falling Out Of Sync? www.sciencefriday.com/segments/ear...

Great interview with Dr. David Inouye, researcher at the Rocky Mountain Biological Station #RMBL & Dr. Theresa Crimmins @theresacrimmins.bsky.social director USA National Phenology Network

#nativeplants

Is Spring Falling Out Of Sync?

The delicate timing between plants, wildlife, and seasons can be thrown off balance by warming temperatures.

www.sciencefriday.com

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Cliff Crego @cliffcrego.bsky.social · Apr 12

#phenology LISTENING: Is Spring Falling Out Of Sync? www.sciencefriday.com/segments/ear...

Great interview with Dr. David Inouye, researcher at the Rocky Mountain Biological Station #RMBL & Dr. Theresa Crimmins @theresacrimmins.bsky.social director USA National Phenology Network

#nativeplants

Is Spring Falling Out Of Sync?

The delicate timing between plants, wildlife, and seasons can be thrown off balance by warming temperatures.

www.sciencefriday.com

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 11

Yes! This map indicates whether the conditions associated with spring were met early or late this year. They were reached early for a period in the S due to warm temps, then it got cold & things stalled out & conditions were reached late. This piece explains it well: www.climate.gov/news-feature...

First signs of spring make their way northward across the U.S.

While the first day of spring arrives on March 20, many places across the United States see their first signs of the season much sooner. The Spring First Leaf Index, provided by the USA National Pheno...

www.climate.gov

Theresa Crimmins @theresacrimmins.bsky.social · Apr 10

Spring didn't really start out very interesting (arriving later than average in much of the south & west), but is showing up early in the middle of the country and creeping into the NE early now! #phenology #statusofspring @usa-npn.bsky.social www.usanpn.org/data/maps/sp...

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Theresa Crimmins @theresacrimmins.bsky.social · Apr 3

Great summary of why spring ephemerals are worth paying attention to, written by a Maryland Master Naturalist
www.baltimoresun.com/2025/03/30/m... #phenology

Maryland’s spring flowers are vital — and vulnerable | GUEST COMMENTARY

Maryland’s ephemeral spring flowers are crucial to the environment, but they face threats, writes naturalist Carl R. Gold.

www.baltimoresun.com

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Theresa Crimmins @theresacrimmins.bsky.social · Mar 24

More info: link.springer.com/collections/...

Plant phenology in an era of rapid global change: new perspectives and frontiers

Phenology is a crucial indicator of plant responses to environmental changes, with multifaceted implications for individual plants, ecological communities, ...

link.springer.com

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