The Value of a Good Field Notebook

One of the most powerful tools of a prairie manager is a field notebook.  There’s no substitute for recording observations and ideas as they happen.  Memories can fade, but notes don’t (as long as you don’t drop them in a stream).

There are multiple roles for a field notebook.  First, just writing a paragraph or two a year about each management unit, combined with a couple of photos, can form the backbone of a very nice basic monitoring system.  Additional data are nice too, of course, but it’s really helpful  just to note the general appearance of a site and the apparent impacts of management treatments and weather.  I try to visit every site I manage late in the season to make these observations, and then use those thoughts and ideas to help guide my management planning for the next year.

Sometimes photos can be important companions to field notes as a way to better describe the appearance of a site. This photo of a second-year prairie planting does a much better job than I could have done with text to capture the abundance of annual sunflowers. The photo is especially interesting to look at now, when the planting has matured (it's now 7 years old and has a well-established and diverse prairie plant community.)

Second, it’s important to record any interesting sightings of species or species behavior.  Sometimes those observations are important by themselves because they can indicate changing conditions in your prairie.  For example, seeing your first Henslow’s sparrow might indicate that a management strategy to provide more thatchy habitat is paying off.  Other times, the observations might be mildly interesting at the time, but become even more valuable later, when you look back and realize that they were part of a larger pattern of change.  After multiple seasons, for instance, you might notice that a particular species was present or especially abundant in years with a management treatment or weather pattern.

Third, tracking the impacts of specific management actions is critically important, especially when you’re trying something new.  When I conduct formal experiments, I collect data on separate datasheets and store them as part of a larger file on that research project.  However, most of my experimentation is much less structured, and my field notebooks are full of observations and thoughts about the impacts of various little trials. Looking back at those observations has helped me hone our techniques over time.  For example, I’ve tried multiple variations on our standard prairie seeding rates in little corners of most of our restoration sites.  Recording the results of those, and then looking over those cumulative records has helped me adjust our strategies over time.

Finally, if you’re like me, many of your best management and restoration ideas come while walking around the prairie.  Capturing those on the spot can ensure you don’t lose them, and can also help record whatever observation or circumstance led you to come up with the idea in the first place.  Of course, writing down those ideas is only helpful if you look at your notes later…

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Photo of the Week – April 13, 2012

Here is a photo of the seed pods of a very common prairie plant in Nebraska.  I wonder how many readers can identify it?  The spiny pods are approximately the diameter of a dime.

Think you know?

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Testing Assumptions – The Milkweed Seed Fiasco

A few months ago, I mentioned a technique that we use to clean milkweed seeds after harvest.  We spread the fluffy seeds out on a concrete floor and light the thin pile on fire, burning the fluff off the seeds.  It’s quick, easy, and fun.  I learned of the technique from a fellow prairie restoration ecologist many years ago, and we’ve been using it ever since.  I’ve also shared the idea with quite a few others.

Burning the fluff off of milkweed seeds. Don't try this at home.

Those of you who have either read this blog frequently or know me personally know that I am a strong advocate for experimenting with techniques whenever possible.  In fact, I often reduce people to blank stares by blathering on about the importance of always testing restoration and other methods to be sure we’re using the most effective strategies.  Surely, then, over the last decade or so that I’ve been using and advocating the “burn the fluff off” technique, I’ve followed my own advice and checked to make sure it actually works, right?   Well…

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Photo of the Week – April 6, 2012

Here’s something I know almost nothing about:  Slugs.

I found this slug in one of our prairies yesterday morning, and managed to get a few decent photos of it.  Slugs are largely considered to be pests in gardens, but I’ve never heard any discussion of the ecological role(s) they might play in grasslands.

A slug on a pussytoes flower in the Platte River Prairies - Nebraska. What was it doing up there on the flower?

Sure, I know that slugs are gastropods that resemble snails without shells.  They have rasping mouthparts, eyes on tentacles, and leave trails of slime as they travel.  But what do they actually DO in prairies?  How important are they in the ecosystem functioning of a grassland?  My understanding is that most slugs I see are probably introduced species, but are they causing any negative impacts in prairies?

The best information I could find online was this field guide to the slugs of Kentucky.  I thought it was great, but certain members of my family found it wildly amusing that someone had made a field guide for slugs.  Those same family members seem largely uninterested in learning more about slugs, but I think they (slugs) are intriguing creatures, and would love to have someone feed me information on their ecological roles.

Anyone?

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Why Prairie Matters – A Guest Essay

It’s never been easy for me to synthesize the importance of prairies into a compact essay or blog post.  My most recent attempt to describe why I care about prairies included, of all things, a Dr. Seuss reference…

The other day, however, I was reading a past issue of the Missouri Prairie Journal (Summer 2011) and ran across an essay by Doug Ladd that encapsulates the importance of prairie better than I could ever hope to do.  Before I was halfway through, I’d already decided to ask Doug for his permission to reprint his words.  Doug is the Director of Conservation Science for The Nature Conservancy of Missouri and a brilliant botanist and ecologist – among other things.  He has had a tremendous influence on the conservation of prairies and other ecosystems.  I learn something every time I’m around him, and I’m not sure there’s a better compliment than that. 

I hope you enjoy Doug’s essay on “Why Prairie Matters.”  Because it was originally intended for the Missouri Prairie Journal, it focuses on Missouri prairies, but it’s easily transferrable to other grasslands.

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WHY PRAIRIE MATTERS

by Doug Ladd

WHENEVER I AM IN A TALLGRASS PRAIRIE, I AM ASTOUNDED BY THE DIVERSITY AND COMPLEXITY SURROUNDING ME—uncounted numbers of organisms, interacting at multiple levels, both visible and invisible to the human eye, above and below ground, shaping and in turn being shaped by the physical environment. To visit a prairie is to be immersed in the result of thousands of generations of competition and natural selection resulting in a dynamic array of diversity, which, collectively, is supremely attuned to this uniquely midcontinental landscape.

Taberville Prairie – north of Eldorado Springs, Missouri.

Here flourish long-lived, deep-rooted perennial plants annealed by the frequent Native American fires, searing summer droughts, frigid winters, episodes of intensive grazing and trampling, and rapid, recurrent freeze-thaw cycles that exemplify the Midwest. These plants in all their varied magnificence in turn support myriad animals ranging from minute prairie leafhoppers that spend their entire lives in a few square meters to wide-ranging mammals and birds that travel hundreds or even thousands of miles in a season.

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Nebraska Wildflower Field Guide

About 20 years ago, Jon Farrar, one of Nebraska’s preeminent naturalists and photographers published a fantastic field guide to the wildflowers of Nebraska and the Great Plains.  Unfortunately, the book sold out within a year and a half and has been nearly impossible to find since then.  Finally, after all this time, it has been reprinted, and the new edition is even better than the first.

I was asked to write a review of the new edition for Prairie Fire Newspaper, and was more than happy to oblige (and not just because I got a free signed copy of the book!).  The review was published in the April 2012 issue of Prairie Fire, and you can read it here.

To see more of Prairie Fire Newspaper, please go to their website at www.prairiefirenewspaper.com.  You can also read more about Jon’s book at the University of Iowa Press website.

If you had Farrar's wildflower field guide, you'd know that this is showy milkweed - not common milkweed - because the flowers are more prominent and have longer "hoods". Not only does the book explain what hoods are, it has excellent photos of both species that make the differences very easy to see.

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Photo of the Week – March 30, 2012

Recently, I wrote about the dangers of prescribed fire, in what turned out to be kind of a downer of a post.  Sorry about that.  My main point, really, was that burning without clear objectives is just taking a risk for no good reason.  I also think it’s important for all of us to be reminded of just how dangerous fire can be.

As a kind of counterbalance to that post, however, I present the following photo from one of our fires this spring.  To me, the photo elicits a wide range of emotions.  It illustrates both the beauty and dangerous power of fire, all wrapped up in one frozen (so to speak) moment in time.

A 2012 prescribed fire in The Nature Conservancy's Platte River Prairies.

Yes, fire can be destructive, but it’s also an important component of many ecosystems and their conservation – not to mention the critical role fire has played in the evolution of human civilization.  More to the point of this post, fire is incredibly appealing.  Just think about how many images of flames and fire appear all around us in our daily lives… 

While prescribed fires are stressful for me, I can still find time to appreciate – and sometimes even photograph – the beauty of fire as well. 

…and later, after the fire is safely out, I can appreciate the photos even more!

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How (Not) to Photograph Prairie Dogs – Part 1

I had it all planned out.  I’d scoped out the site, found the prairie dogs, and located an active burrow close to a road ditch with enough cover to conceal me and my camera.  I’d even built a kind of half-blind – a small piece of garden fencing with tall grasses woven into it – with a space for my lens to poke through.  All I had to do was show up at the dog town in the early morning, crawl into position, set the little photo blind in front of me, and wait for the prairie dog to come out into the beautiful early morning sunshine to pose for a portrait.

…Which is how I came to be lying on my belly in a road ditch yesterday, waiting for the sun to come up.  It was a really beautiful day – light winds, a pleasant temperature, and just enough haze on the horizon to soften the light when the sun finally emerged.  As I lay in the ditch, I was even pleasantly surprised to hear prairie chickens booming near the wetland just to the west of me.  In short, everything was wonderful, and just as the sun started to poke through the haze, the first prairie dog emerged from its burrow in the center of the small town and started barking.  ”Won’t be long now,” I thought to myself.

Looking back, I now recognize the barking as more of a kind of mocking laughter.   “Hee Hee Hee Hee!,” it laughed mockingly.  ”Hee Hee Hee Hee Hee Hee Hee…”

At the time, not being familiar with the local customs of this particular dog town, I mistakenly assumed that once the first prairie dog started barking, the others would soon emerge and begin doing interesting and photogenic activities.  Instead, the lone prairie dog – from a distance of several hundred yards from my little blind – just continued his lone sardonic monologue for about 20 minutes.

“Hee Hee Hee Hee Hee Hee…!”

Eventually, a few other prairie dogs did pop out of their holes and join in the fun – though none of them were anywhere close enough for good photo opportunities.  All the while, the burrow right in front of me, the one I’d carefully scouted several days earlier, remained sneeringly silent. As the sun continued to climb, inching closer and closer to the point at which the light would be too bright for good photography, the only prairie dogs in sight were the jokesters out in the middle of the town.

A spiteful gang of prairie dogs, maintaining a needlessly long distance from the photographer lying at the edge of the town. (This photo is cropped significantly to allow you to see that these actually ARE prairie dogs, and not just little brown specks.)

A small group of 8 to 10 western meadowlarks was milling around in the town as well, each pausing occasionally from feeding to sing the characteristic meadowlark song.  I consoled myself with the thought that if nothing else, I’d at least get myself a decent photo of a meadowlark as soon as one ventured close enough.  It’s funny… I’ve been listening to western meadowlark songs my whole life, but never fully realized the true spiteful tone of those songs.  Especially from a distance of several hundred yards…

A fuzzy long-distance photo of a contemptuous meadowlark with a jeering prairie dog right behind it.

Just as I was about to give up on the whole adventure, I heard a prairie dog start chipping away at close range.  Unfortunately, it was about 30 yards to my left, and the vegetation along the road ditch/fenceline was blocking my line of sight.  Knowing full well how the little escapade would end, I nevertheless backed slowly out of my position and started army-crawling quietly down the road ditch toward the sound.  When I was close enough to the sound, I started moving very slowly – inch by inch – through the tall grass toward the prairie dog.  I could barely see the prairie dog’s head, a mere 20 feet in front of me, through the vegetation.  About two feet closer, and I’d have a clear view.

At about one and half feet, I heard the following sound – “Hee Hee Hee Hee Hee Hee…YOINK!”

And down it went.

A prairie dog burrow, from which - only moments before - a prairie dog was in plain site, laughing mockingly.

Out of nothing but pure stubbornness, I laid there with my camera trained on the hole for a full 10 minutes.  Nothing.  Finally, I grabbed my camera, stomped back to the truck, and headed back to town to catch my first conference call of the day.

But I’m not giving up.  Oh no – I’ve got a plan.  Now that I’ve fully studied the behavioral pattern of the dog town’s inhabitants, I know JUST what I’m going to do next time.  I’m going to get me some FANTASTIC photos of prairie dogs.  Photos that will KNOCK YOUR SOCKS OFF.  Just you wait.

(“Hee Hee Hee Hee Hee!”)

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Time to Go North

I was fortunate enough to be in a viewing blind along the Platte River last Friday and Saturday nights, watching sandhill cranes coming in to roost.  Both nights had fantastic weather, beautiful sunsets, and excellent opportunities for our guests to see cranes up close.  However – there was a huge difference between the two nights in terms of the number of cranes that came in to roost.  On Friday night, we could probably see around 30,000 birds from the blind I was in.  On Saturday, the number was probably down around 5,000. 

Sandhill cranes at sunset on Friday night. As the sun went down, the numbers of cranes on the river went up. I'm not an expert at estimating numbers, but I'd guess there were at least 30,000 birds within view of the blind. A big contrast to Saturday night - though Saturday night was nothing to sneeze at, with birds landing close to the blind and a fantastic sunset as well.

It looks like this year’s early arrival of cranes on the Platte is leading to an early exit as well.  Normally, the 24th of March (Saturday’s date) sits right at, or shortly after the peak time to see sandhill cranes on the Platte.  Even if some of the early arrivals have started to head north to breed by the 24th, the numbers are still very high in most years.  This year, it was as if someone opened the gates and let them out Saturday morning, and they all rushed north at the same time.  Don’t get me wrong, there are still enough cranes around that driving the roads during the day and watching them come to the river at night are fantastic experiences.  It’s just different than it was during the 2-3 weeks leading up to last Friday.

It was especially interesting to be in the same viewing blind the night before and the night after the big departure that apparently took place during the day on Saturday.  Saturday was one of those days everyone wishes for on a weekend.  The temperature got up into the low 80′s (normal highs are 55 degrees F this time of year) with sunny skies and light winds.  Before heading to the blind, I spent the day working in the garden and playing baseball with my kids in the backyard.  It’s exactly the kind of day I expect cranes to leave and head north – except that it was a week or two before I would typically expect a mass exodus.

However, Friday’s weather was almost identical to Saturday’s weather, so why did they leave Saturday and not Friday?  On both days, we watched as groups of cranes spiraled up into the sky, riding the warm air currents until they were almost out of site.  On Friday, most of them must have come back down to roost on the river on more time, but on Saturday, they apparently got up high, liked what they saw/felt, set their wings, and glided north.  Maybe the high air currents on Saturday were coming from a different direction (south, presumably) than they were on Friday.  Maybe they used Friday as a practice day and the itch was unbearable two days in a row, so they gave in and headed out.

Going north early can be a risky venture for breeding cranes.  The primary role of the Platte River as a spring staging area is to allow cranes to build fat reserves while feeding on waste corn and invertebrates.  Those reserves are important because once they head north they typically have fewer opportunities to feed as they are busily setting up nesting territories, laying eggs, and caring for their young colts.  Heading north early means they are more likely to find breeding areas that are still frozen and inhospitable.  That can lead to additional stress, less food availability, and a greater chance that things will go badly during the nest season.  Waiting a couple weeks gives them some insurance that conditions will be better in the nesting grounds when they arrive. 

So did the cranes that left on Saturday know something?  Did they leave simply because they’d been on the Platte long enough to fill up with food and energy?  Or are they somehow picking up cues that make them feel good about the weather they’re heading into up north?  I don’t have the answers, but I was glad to be an observer when they made their choice. 

I wish them luck.

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Photo of the Week – March 22, 2012

Beaver art?

Beaver "sculpture" at the end of a downed cottonwood's branch. Click on the photo for a larger, sharper image.

This week, I had some time to walk along the creek that runs through our Platte River Prairies.  As I was walking, I found this big cottonwood tree that had fallen over and subsequently had most of the bark stripped off its branches.  Clearly there were beavers at work.  I was particularly drawn to the end of one large branch that had been chewed in an odd way.  No, I don’t think it was done to be artistic, but I can’t actually come up with a logical scenario that explains it either.  Accidental art?

The two-foot diameter base of this cottonwood must have taken the beavers quite a while to work through.

The cottonwood tree was very large – over two feet in diameter.  A curious choice, since there were numerous smaller willow and cottonwood trees nearby.  On the one hand, they gained an awful lot of branches and bark from dropping one tree.  On the other hand, boy, what a job!

The beavers’ lodge was on the bank of the stream, right underneath the fallen tree.  I’d really like to know whether they built the lodge before or after they dropped the tree…

I'd love to know whether the lodge was initiated before or after the big tree was dropped. It ended up being right underneath the fallen tree.

Beavers are great engineers, of course, dramatically changing water courses and wetlands wherever they live.  Sometimes that ability brings them into conflict with humans.  We’ve been battling beavers at another of our sites where their dams are backing water over the roads that we and our neighbors rely on to get to our properties.  In that case, the engineering of the beavers has been less pleasant to observe – though no less impressive.  In the case of the “artistic” beavers in our Platte River Prairies, I’m happy to let them build and create at will.  In fact, I look forward to watching what they come up with next.

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