Years ago, I started reading books on Taoism. One Taoist concept I learned early on was the inevitability of change. Nothing stays the same, Taoists tell us. Things move, shift, grow, and fade, whether we’re paying attention or not.
Years later, I became interested in ecology, and I began to wonder: how do forests change? Specifically, I began to wonder how forests in the northeastern United States have changed over the past 400 years.
Turns out, I wasn’t the only one wondering about this. Ecologists have been trying to figure this out for a long time. What they’ve found is somewhat surprising and even a bit paradoxical:
After 400 years of intense land use, the northeastern forest is both largely unchanged and completely transformed.
I’m excited to announce that I’ll be leading a series of forest ecology outings, and I’d love for you to join me!
On August 30 and 31, 2025, I will be leading two Summer Forest Ecology Outings at McConnells Mill State Park in Pennsylvania.
Designated a National Natural Landmark for its outstanding features, McConnells Mill is a treasure trove for learning. Central to the park’s landscape is the Slippery Rock Gorge — a deep ravine carved by powerful forces, exposing millions of years of ancient bedrock and currently supporting mature forest ecosystems.
Located in northwestern Pennsylvania, Cook Forest is home to one of the last remaining old-growth forests in the entire region, with 11 old-growth areas spanning over 2,300 acres. One of the areas within the park, the Forest Cathedral, contains arguably the finest concentration of old-growth trees in the northeastern United States.
During these outings, we will walk through deciduous and coniferous woodlands while discussing forest ecology. We’ll investigate big trees and big rocks. We’ll see historic landmarks, and we’ll discuss important geological influences that have drastically shaped the landscape.
In addition to learning key characteristics of mature and old-growth forests, participants will learn tree identification, mushroom ecology and identification, the role of fire as an ecological agent, ways to interpret forest history, and much more.
These outings are great opportunities to learn, explore, and connect with nature in spectacular settings. They’re also great opportunities to meet wonderful people.
Please note: Each outing is a single-day event. To maximize your learning experience, space is limited and registration with payment in advance is required to secure your spot.
I’m excited to announce that I’ll be leading a Summer Forest Ecology Outing in a few weeks, and I’d love for you to join me!
This outing offers a unique in-person opportunity to learn the fascinating ecology and geology of a remarkable area: McConnells Mill State Park in Pennsylvania.
Designated a National Natural Landmark for its outstanding features, McConnells Mill State Park is a treasure trove for learning. Central to the park’s landscape is the Slippery Rock Gorge — a deep ravine carved by powerful forces, exposing millions of years of ancient bedrock and currently supporting mature forest ecosystems.
During this outing, we will walk through deciduous and coniferous woodlands while discussing forest ecology. We’ll investigate big trees and big rocks. We’ll see historic landmarks, and we’ll discuss important geological influences that have drastically shaped the landscape.
In addition to learning key characteristics of mature forests, participants will learn tree identification techniques, mushroom ecology and identification, the influence of glacial activity on landscape development, ways to interpret forest history, and much more.
This outing is the perfect opportunity to learn, explore, and connect with nature in a truly spectacular setting.
Interested? Here are the details:
When: Saturday, July 12 or Sunday, July 13, 2025 (Choose one date; both programs will cover the same material.) Where: McConnells Mill State Park, Pennsylvania Time: 10:00 am — 4:00 pm
To maximize your learning experience, space is limited and registration with payment in advance is required to secure your spot.
I’m really excited to announce that I’ll be leading an Old-Growth Forest Ecology Outing in a few weeks, and I’d love for you to join me.
This outing offers a unique in-person opportunity to learn the rich ecology and distinctive features of older forests.
We’ll begin the day by walking through a mature upland hardwood forest and discussing forest ecology. In the afternoon, we will explore a magnificent old-growth conifer forest and discuss old-growth forest dynamics.
In addition to learning key characteristics of mature and old-growth forests, participants will learn tree identification techniques; mushroom ecology and identification; the influence of geology on forest development; ways to interpret forest history; the role of fire as an ecological agent; old-growth forest misconceptions; and much more.
This event will take place in Cook Forest State Park. Located in northwestern Pennsylvania, Cook Forest is home to one of the last remaining old-growth forests in the entire region, currently hosting 11 old-growth areas totaling over 2,300 acres. One of the areas within the park, the Forest Cathedral, contains arguably the finest concentration of old-growth trees in the northeastern United States. This remarkable area is home to dozens of old-growth eastern white pine and hemlock trees, many over 300 years old and towering above 140 feet in height.
This outing is the perfect opportunity to learn, explore, and connect with nature in a truly spectacular setting.
Interested? Here are the details:
When: Saturday May 31, 2025 or Sunday June 1, 2025 (Choose one date; both programs will cover the same material.) Where: Cook Forest State Park, Pennsylvania Time: 10:00 am — 4:00 pm
To maximize your learning experience, space is limited and registration with payment in advance is required to secure your spot.
At least that’s what some people say. If it’s true, then sadness would have to be a butterfly-less world.
Fortunately, you and I will probably never experience such a world. The planet currently hosts over 17,000 butterfly species. The United States alone has over 700 butterfly species. Most of these species are doing okay, but some are at risk of extinction. The Karner blue and San Bruno elfin, among others, are endangered in the United States.
And then there’s the monarch butterfly — an iconic species known for its epic migration. Monarch populations, according to several credible sources, are declining. To halt the decline, the U.S. Fish and Wildlife Service has recently proposed to list the monarch as threatened under the Endangered Species Act.
Interestingly, this proposal is receiving criticism. Some people think that monarchs don’t need our help. Some researchers even claim there isn’t strong evidence of widespread declines.
Who are we to believe? Are monarch butterflies really in trouble? If so, why are populations declining? Is more intervention a good thing? Should we really be raising monarchs at home? And how does organized crime tie into all this?
This course is designed to improve your ecological knowledge by introducing you to fascinating ecosystems — including alvars, barrens, bogs, dunes, fens, glades, savannas, vernal pools, and others!
Learning to recognize ecosystems is an essential step toward understanding how nature works. When we pay attention to the bigger picture, we see beyond individual components. We see connections, we see relationships, and we see where humans fit into the story.
If you want to develop ecological literacy; if you want to be able to read landscapes more effectively; if you want to see how all the components within nature are connected, consider enrolling in Exploring Wild Ecosystems today.
Please note that Exploring Wild Ecosystems is open for one week only — from today until Monday, September 30. After that, registration will be closed. Upon registration, you can immediately access all course content and view the lessons at your own pace.
To learn more about the course, check out this video which gives you an overview of what you can expect.
Thanks for supporting nature education! I hope to see you in there!
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It was our final day in Iceland before returning back to the US. We so many great experiences visiting this country of beautiful extremes, but more than anything, what we wanted to see on our last day was a glacier. We talked about it, and decided that we should see a glacier, as we might […]
Paths I Walk 
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