The Post-Grazing Year

At the beginning of the 2025 growing season, I picked out three sites I could visit repeatedly to photograph/document how a prairie responded to having been grazed the previous year. That turned out to be overly ambitious, but I did manage to focus on one of those sites – an 80×80 foot square marked out at our family prairie – and visited it frequently throughout 2025. I really enjoyed the project and happy to finally share a lot of my favorite photos from it.

One of the reasons I wanted to do this project is that many people have very limited experience with “conservation grazing”, or grazing that is aimed at achieving particular conservation objectives. That’s understandable if your only exposure to cattle grazing comes from seeing overgrazed pastures. As with most things, there’s a lot of variety out there. While it’s not hard to find examples of poorly-grazed grasslands across the Great Plains, there are also countless examples of very thoughtfully-applied grazing that create both good habitat for wildlife/pollinators/plant communities and profitability for ranchers. It’s important to highlight those examples and show that prairies can thrive under well-managed grazing.

Grazing has long been a significant component of prairie ecology. Today, it is still an important part of many prairies, particularly in the Great Plains. Grazing can be used to influence the competition between plants and determine the composition and diversity of the plant community. It can also shape habitat structure, creating areas of short, tall, and patchy vegetation, respectively. A mix of those various habitat types supports a diverse community of animals – large and small.

Here’s the plot on May 1. It was very short from being grazed the entire previous season. The yellower area in the top left is a different part of the same prairie that’s at a different stage of the grazing/rest cycle.

Much of the cattle grazing we’re experimenting with right now, both at The Nature Conservancy/Nebraska and at my family prairie, involves long periods of grazing followed by long periods of rest. There are lots of reasons for this approach, which I won’t go into here, but the biggest objective is to create a broad range of habitat structure across a prairie, without compromising the diversity and richness of the plant community. It’s about creating habitat heterogeneity and ecological resilience.

We’ve been managing our family prairie over the last 10-15 years with open-gate rotational grazing, which has a lot of similarities to patch-burn grazing but isn’t driven by fire. The 80×80 foot plot I photographed in 2025 had been grazed hard most of the previous season (June through October 2024) and part of the season before that (July through Mid-August 2023). By October 2024, it was uniformly short, with a fair amount of bare ground exposed (see the first photo of this post, which shows the plot at the beginning of the 2025 season).

This kind of grazing may sound (and look) irresponsible to people who are either uncomfortable with cattle grazing overall or who have been taught that you should never graze more than half of the biomass of a pasture before moving cattle out. An important point, though, is that the same pasture was rested for two full years prior to 2023/2024 and will be rested for two more full years before it is grazed again. That’s a lot of time for grazed plants to regain their energy and vigor. We’re also looking at how soils respond to this grazing pattern and are seeing positive results (more on that when the data is fully analyzed).

A big patch of purple prairie clover on June 27. Note how short the surrounding grasses are – they’re low on energy because of the previous year’s grazing. They’ll have recovered that energy by next year.
Stiff goldenrod was abundant and in full color on September 13. Again, note the sparsity and short height of the grasses and the space between plants.

My favorite part of grazing approaches like open-gate rotation and patch-burn grazing is the way the prairie community responds in the first year after a long season of grazing. The vigor of the typically-dominant plants (tall grasses, in particular) has been temporarily suppressed, releasing many other plants from that competitive pressure. This usually results in a big wildflower party, including both long-lived perennials and a lot of short-lived plants who are taking advantage of a short window of opportunity to germinate, bloom, and die while the big grasses aren’t able to prevent them from doing so.

The resulting habitat structure is terrific for many animal species, large and small. The reduced height and density of grasses means that it’s easy for animals to move through the vegetation. At the same time, other plants grow tall, creating a kind of miniature savanna, where tall wildflowers are like trees, surrounded by shorter vegetation. Animals can move from sun to shade easily to regulate their temperature. They can also can feed in open areas but quickly retreat to cover when they want to. This supports a huge abundance of invertebrates. It also draws in many larger animals, attracted both by the habitat structure and the food source (invertebrates).

In this October 7 photo, the foreground is the area featured in this post at the end of the 2025 growing season and the short-cropped area in the background is what was grazed hard in 2025 and will be rested in 2026 and 2027.

One highlight of the year was that I found purple coneflower in my plot (two different plants). I’ve only seen the species a few times during the 30 years or so I’ve been involved in the management of our family prairie and it had been a while since my last sighting. I wish I could tell you whether it was there because of some overseeding I did a few years ago or because it had been there a long time without me noticing it. Either way, it was really nice to find it.

Purple coneflower (Echinacea angustifolia)

Access to bare ground is crucial for many animals, including a lot of ground nesting bee species, bandwing grasshoppers, various invertebrate predators, and lots of others. Some of those need areas nearly free of any vegetation, but many just need places where the soil isn’t covered by a thick layer of thatch. Last year’s grazing removed most of the plant material from this part of the pasture and also tempered the growth of dominant grasses. The result was that there was lots of great habitat for species that need both bare soil and abundant sunlight.

The bare ground created by last year’s grazing made important habitat for lots of creatures, including this tiger beetle larva hunting at the top of its burrow.
This narrow stink bug was well-camouflaged on its favorite food plant – sideoats grama.
This fly was killed by a fungus that made it crawl to the top of this fleabane plant before dying. Read more about that here.
This bush katydid thought it was hiding from me by sitting still.

The following slideshows provide a visual journey through the 2024 season, from May through October. There are also two additional slideshows at the end, featuring lady beetles and crab spiders. If you’re reading this in an email, these slideshows will display as grids of images. If you click on the title of the post at the top of the email, you’ll be able to view this post online and will be able to scroll through the slideshow and see larger versions of the photos.

May Slideshow

June Slideshow

July/August Slideshow

September/October Slideshow

Finally, here are two last (short) slideshows featuring lady beetles and crab spiders. Why did I choose to highlight these two groups separately? That’s a great question. We all make decisions, don’t we?

Lady Beetles

Crab Spider Slideshow

For any of you who made it this far, I hope you enjoyed the results of this project. For me, it was a like a more relaxed version of my square meter project, in that I visited the same spot over and over through the season. An 80×80 foot plot seemed like a whole universe compared to that square meter, though.

Hopefully, the photos helped you visualize the ways in which a prairie can respond to cattle grazing. This single example, of course, shouldn’t be used to predict how other prairies might respond to similar management, though it was pretty typical of what I’ve seen on numerous sites in central Nebraska.

The most important message is that prairies have a lot of resilience built into them and it’s fascinating to watch that resilience on display. There are lots of good/right ways to manage prairies, depending upon your objectives, and we surely haven’t explored all of those yet. It’s ok to experiment with new approaches to see what happens. How else will we learn?

6 thoughts on “The Post-Grazing Year

  1. Chris,

    Have you noticed cattle negatively affecting more preferred (decreaser) plant species even in the rested areas of a patch burn system? In effect do they specifically search out particular plants no matter where they are. Or do the cattle avoid the rested areas enough to allow more palatable species to flower and set seed in those rest periods? Thanks!

    • Hey Jeff – great to hear from you. It’s an important question. We definitely keep an eye on that, and we certainly see a few species of plants that are sought out by cattle and grazed in those unburned areas. For us, the biggest examples are Canada milkvetch, rosinweed (Silphium integrifolium), and common/showy milkweeds. To a lesser extent, Maximilian sunflower, spiderworts, and a few others, as well. This is one of the reasons I like the open gate approach – it includes some enforced exclusion of grazing to make sure those plants get a rest. We haven’t lost any of those attractive-to-cows plants, though, over nearly 25 years of patch-burn grazing in some sites, but we have tried to help ensure that by adding some full rest periods into the system. Sometimes, we do that by fencing out areas for a year. Sometimes, we’ve taken an entire year off of grazing. I’d say those plants are hanging on well in places where they get grazed 5 out of 6 years or so, but that’s just a guess. I’m sure all three of those favorited species would be more abundant in less-grazed or ungrazed areas than in patch-burn grazing systems. However, we’ve only been doing the open-gate grazing for 5-10 years (depending on the site) and I’m seeing indications that all three are starting to become more abundant under that approach than they were in patch-burn grazed sites, so that enforced rest seems to be making a difference. It’s complicated…

  2. Hi, Chris! Been reading your blog for a few years now and really love it. I was wondering if what you’re calling yarrow is what I grew up in Illinois calling Queen Anne’s Lace? It looks very much like it.

    • Thanks! No, what I’m calling yarrow is Achillea millefolium. Queen Anne’s Lace (Daucus corota) is also known as wild carrot and is a non-native species (maybe mildly invasive, depending on location). They do both have a similar appearance in photos, but in person, they’re very different. Queen Anne’s Lace is much taller (often 3-4 feet tall or more) and Yarrow is usually just 12-24 inches in height. The leaves are also very different.

Leave a reply to Jeffrey Zajac Cancel reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.