Revisiting the Swift Tiger Beetle – Part 3

…continued from Revisiting the Swift Tiger Beetle – Part 2.

The Oklahoma trip had been an unqualified success. Not only had I managed to find the rare Cylindera celeripes (swift tiger beetle) at Alabaster Caverns, I had also determined the population there was healthy and, in fact, occurred robustly across a large swath of red clay/gypsum hill habitat in the vicinity of the Cimarron River (Woodward and Major Counties) in northwestern Oklahoma. This is good news for the species, who some have regarded as a potential candidate for federal listing on the endangered species list. There is no doubt that the species has suffered greatly in many parts of its range during the past century – most likely due to loss of habitat; however, the presence of a strong population in Oklahoma gives reason for optimism about its long-term prospects. It would have been even better had I found the species at the two Nature Conservancy preserves (Four Canyon and Tallgrass Prairie) that I had targeted, and the reasons for its apparent absence at those two sites despite an abundance of apparently suitable habitat remain a mystery to me (although I have my suspicions). Nevertheless, I returned to St. Louis happy, with new localities in my database and live individuals in containers of native soil for another attempt at rearing.

Our work with this species was not done, however. While C. celeripes has never been recorded in Missouri, my colleague Chris Brown and I have long suspected that it might occur here – most likely, we felt, in extreme northwestern Missouri where the Loess Hills landform reaches its southern terminus. We had looked for it in this area a few times before on the few remaining dry, hilltop prairie relicts that are so common further north in Iowa, and we had also looked for it in the larger tallgrass prairie remnants of west-central Missouri. None of these searches were successful, and with each unsuccessful effort it seemed less and less likely that the species actually occurred within the state – especially considering the declines that the species has experienced throughout its range. However, when we managed to find a small, newly discovered population of the species last summer in the Loess Hills of southwestern Iowa, just 60 miles north of Missouri (see The Hunt for Cicindela celeripes), we decided that one more thorough effort to locate the species in Missouri was in order.

Star School Hill Prairie Natural Area (north tract), Atchison Co., Missouri.

Star School Hill Prairie Natural Area (north tract), Atchison Co., Missouri.

Our plan was straightforward – we would travel to northwestern Missouri each weekend beginning in late June and search the most promising hilltop prairie relicts that still remain in Missouri. There aren’t many of these, so I contacted Tom Nagel of the Missouri Department of Conservation – who probably knows more about Missouri’s hilltop prairie relicts than anyone else – for assistance in identifying these parcels. Tom graciously sent me descriptions and aerial photographs of the highest quality relicts still remaining in Missouri. None of these are large (12 contiguous acres or less), and all have been impacted to some degree by woody encroachment and are in various stages of restoration. We had already searched one of these tracts (Star School Hill Prairie) a few times, but two others were new to us. So, on a Friday evening before the first of three planned weekends for our study (and only two weeks after returning from Oklahoma), Chris and I made the long drive across Missouri and north along the Missouri River and began our search the next morning.

Fieldmate Chris Brown surveys loess hilltop prairie habitat at Star School Hill Prairie Natural Area, Atchison Co., Missouri

Fieldmate Chris Brown surveys loess hilltop prairie habitat at Star School Hill Prairie Natural Area (south tract), Atchison Co., Missouri

Our first stop was High Creek Hill Prairie in Brickyard Hill Conservation Area (Atchison Co.). We had been to Brickyard Hill a few times but had not previously found this particular hilltop prairie. We found the tract, a long, narrow series of ridge tops and southwest-facing slopes, thanks to Tom Nagel’s map and began searching with all the enthusiasm and optimism that accompanies any new search. Our optimism waned with each hilltop ridge that we traversed not seeing the beetle, until we reached the easternmost ridge amidst a jumble of eastern red-cedar cadavers that halted any further progress or promise. As we stood atop that last hill, we debated our next move. Chris had noted apparently good habitat on the lower slopes below us, while I had spotted another very small hilltop tract across a wooded ravine and disjunct from the main prairie. We decided these areas should be explored before moving on to the next site, but as we searched those lower slopes our optimism continued to wane. The habitat was perfect based on what we had seen in Iowa last year and what I had seen in Oklahoma earlier in the month – small clay exposures amongst clumps of undisturbed little bluestem and grama, but still no beetles. Chris, refusing to accept defeat, continued to search the slope, while I worked my way over to the smaller hilltop tract I had seen from above. After crossing through the wooded ravine, I found an old 2-track running along the base of the tract and began walking along it. The small slope above the 2-track was littered with large cadavers of the invasive eastern red-cedar (Juniperus virginiana), apparently left in place after chainsawing to provide fuel for a planned, future burn. As I walked, a white-tailed deer bolted from a nearby cadaver, giving me a bit of a start, and I veered towards the cadaver to have a look at where it had bedded down. By this time I almost wasn’t even really thinking about C. celeripes anymore – we had been there for about an hour and a half and searched the most promising habitats without success – the small tract where I was now working was almost a last gasp before moving on. As I approached the deer’s bedding site, a “flash” in the thick vegetation caught my eye, and I knew instantly what it was. Immediately I dropped to my knees and tried to “trap” the evasive little beetle (I’ve found that forming a “trap” between the crotches of my hands and gradually closing my hands together forces the beetle to run up and over one of my hands, at which time I can try to pin it down with my other). The beetle behaved exactly as expected, running over my left hand – but I missed it. I trapped it again, and once again it ran over my hand too fast to pin down. I tried to follow it as it zigzagged erratically through the thick vegetation, but in the blink of an eye it was gone. I spent the next several minutes frantically pulling apart the vegetation in a 2-foot radius around the spot in what I knew was a vain attempt to relocate the beetle before ultimately accepting that I had missed it. No matter – I had seen it and had absolutely no doubt about what it was – C. celeripes does indeed occur in Missouri! Wow – big news! I knew if I had seen one, I had a good chance of seeing another, so I began searching the area again – now with much more deliberation. I walked back and forth along the old 2-track, up and down the cadaver-littered slope, and back to the original spot several times. As time passed, a gnawing fear began to grow inside me that this new state record might lack a voucher. Suddenly, very near the original spot, I saw another. This time I pounced with authority and made no mistakes, and after securing the live beetle in a vial I gloated and congratulated myself unabashedly inside while bursting to give the news to Chris. I searched the slope some more, but I couldn’t take it anymore – I had to tell someone. I pulled out my cell phone and began texting a message to my daughter Mollie (who really doesn’t care about beetles but loves to receive text messages). As I was texting, Chris appeared on the lower slope, obviously noting that my net had been left on the ground purposely to mark a spot. As I finished texting I told Chris to come here, I wanted to show him something, and then non-chalantly handed him the vial. I would give anything to have a video of the look on Chris’ face as it changed from quizzical dumbfoundedness to shocked elation. Chris, too, had reached a low point in his optimism after thoroughly searching the previous slope without success, but now we were both as giddy as school boys – our long efforts had finally paid off with a new state record for one of North America’s rarest tiger beetles (the way we were acting, you’d have thought we’d just discovered plutonium!). We searched the slope for another half hour or so, with Chris seeing one more individual very close to where I had seen the first one. Whether it was the same or a different individual is unknown, so we decided that we had seen at least two individuals at this site. The discovery of C. celeripes here caused us to once again search the lower slope that Chris had previously searched so thoroughly, but again the beetle was not seen. Our giddiness was beginning to give way to concern over the few individuals we had seen and how localized they seemed to be. We had been at the site now for about three hours, and I was famished. I hiked back to the truck, noting some habitat at the far western end of the main prairie where we had begun our search that looked like it deserved another search. As I ate, Chris worked his way over to that spot, and after a period of time I heard him yell down to me and give me the “thumbs up.” I hurriedly finished eating and worked my way up to where he stood, and together we located two more individuals – taking one as a voucher for the site and ganging up on the other to keep it pinned into an open area where each of us could take field photographs before we finally let it “escape.” Seeing the species on the larger parcel had relieved our concern a little bit, and we felt a little less worried about its status here now.

Cylindera celeripes - High Creek Hill Prairie, Brickyard Hill Conservation Area, Atchison Co., Missouri (new state record)

Cylindera celeripes - High Creek Hill Prairie, Brickyard Hill Conservation Area, Atchison Co., Missouri (new state record)

Later in the day we would see the species again at Star School Hill Prairie Natural Area , the northernmost substantial loess hilltop prairie within Missouri, and one that we had searched at least twice previously for the species. Again, we saw only two individuals in almost three hours of searching, confirming the impression first gained at Brickyard Hill that the species is not present in very high densities. Like Brickyard Hill, the beetles at this site were found in areas of undisturbed hilltop prairie with moderately thick shortgrass vegetation and were seen only when they IMG_0789_1200x800ran from one grass clump to another after being disturbed by our approach. We also looked for it at a smaller disjunct parcel just to the north, but the lateness of the hour limited the time we had to explore this site. Star School Hill Prairie is some 6 miles north of Brickyard Hill, thus, finding C. celeripes at two sites not in close proximity increased our optimism that the species might actually occur in many of the loess hilltop prairie remnants still remaining in northwestern Missouri. This optimism was further increased the next day when we saw two more individuals at one of Missouri’s southernmost hilltop prairie relicts at McCormack Loess Mounds Natural Area in Holt Co. However, our optimism is tempered by the fact that, again, we saw only two individuals, both of which were seen in a small, unburned spur extending northward off the main prairie, while none were seen in the much larger main parcel that appeared to have been recently burned in its entirety.

Cylindera celeripes macrohabitat at Star School Hill Prairie.  Beetles were seen along the narrow trail in the foreground and on the mild upper slopes (below bur oak in upper left).

Cylindera celeripes macrohabitat at Star School Hill Prairie. Beetles were seen along the narrow trail (foreground) and on the mild upper slopes (below bur oak, upper left).

The presence of this rare Great Plains species in Missouri’s critically imperiled hilltop prairies is cause for both excitment and concern. Cylindera celeripes represents a unique and charismatic addition to the state’s rich natural heritage. However, like soapweed yucca (Yucca glauca var. glauca), skeletonweed (Lygodesmia juncea), and the dozen or so other plant and animal species of conservation concern found within the hilltop prairies of IMG_0774_1200x800Missouri’s Loess Hills, C. celeripes appears to be entirely dependent upon these habitats for its survival within the state. Ensuring its continued survival will require careful reconsideration of the management approaches used for these rapidly shrinking natural communities. Prescribed burning has been and will continue to be an important tool in restoring our hilltop prairies; however, nonjudicious use of fire could lead to local extirpaton of C. celeripes within these habitats. Should that occur, recolonization from nearby parcels is unlikely due to the small, highly disjunct, and upland character of Missouri’s hilltop prairie remnants and the flightless nature of C. celeripes. As a result, rotational cool-season burns should be utilized as much as possible to avoid localized extirpations, especially on smaller parcels (Panzer 2002).

Hilltop prairie at McCormack Loess Mounds Natural Area, Holt Co., Missouri.  The main tract (pictured) was recently burned - beetles were found in a small unburned spur (off left center).

Hilltop prairie at McCormack Loess Mounds Natural Area, Holt Co., Missouri. The main tract (pictured) was recently burned - beetles were found in a small unburned spur (off left center).

Photo details:
Beetles: Canon 100mm macro lens w/ 68mm extension on Canon EOS 50D, ISO 100, 1/250 sec, f/18, MT-24EX flash 1/2 power through diffuser caps.
Landscapes: Same except Canon 17-85mm zoom lens (17mm at Star School, 20 mm at McCormack), 1/60 sec, f/8-9 (Star School) or f/13 (McCormack), natural light.

REFERENCE:

Panzer, R. 2002. Compatibility of prescribed burning with the conservation of insects in small, isolated prairie reserves. Conservation Biology , 16(5):1296-1307.

Copyright © Ted C. MacRae 2009

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About Ted C. MacRae

Ted C. MacRae is a research entomologist by vocation and beetle taxonomist by avocation. Areas of expertise in the latter include worldwide jewel beetles (Buprestidae) and North American longhorned beetles (Cerambycidae). More recent work has focused on North American tiger beetles (Cicindelidae) and their distribution, ecology, and conservation.
This entry was posted in Cicindelidae, Coleoptera and tagged , , , , , , , , , , , , . Bookmark the permalink.

17 Responses to Revisiting the Swift Tiger Beetle – Part 3

  1. Alex/Watcher says:

    Ted- great story. I love adventure stories told in a way that even if it’s way outside of your knowledge and expertise, you can share the frustration, hopes and excitement of the teller. Thanks.

    These posts have also piqued my interest in native prairie remnants. Like many snobby mountain-staters, I didn’t realize there was such striking, rugged country in places like OK and MO.

    • Thank you, Alex. I’m glad to know the excitement comes through, because it was a thrilling 2-week ride.

      Even as a resident of Missouri, it has only been in the past few years that I have started to fully appreciate the beauty and diversity of the Great Plains. It’s an incredible landscape with lots of hidden jewels awaiting those who make the effort to look for them.

  2. We must echo Alex’s sentiments. It’s great fun to come along on these adventures with you, and to get a chance to see areas and creatures that are quite unlike our experiences in Wisconsin. The landscape at Star School Hill Prairie Natural Area is very enchanting — the terrain is almost surreal. Thanks for sharing!

    • Thanks, K&R – I really appreciate your nice comments. I’m really quite excited about finding C. celeripes in Missouri – if I had to put money on it before this season I would have bet against it.

      The sad thing is, there are only about 50 acres of remnant hilltop prairie remaining in Missouri – only half of which is in public ownership. This unique habitat has been severely reduced over the past century by woody encroachment – likely a result of fire suppression combined with overgrazing. It will be extremely important to manage these small remaining parcels wisely!

      • Dear Ted,

        50 acres?! ‘Critically imperiled’ is right. That is indeed very sad to hear. Thanks for raising awareness about this unique ecosystem! We feel quite drawn to it. It sounds like the burns are necessary, but we do hope that the beetles are kept in mind.

        • There are some other equally imperiled natural communities in Missouri, such as the sand prairies of the southeastern lowlands – ‘deserts in the swamp’ you might call them. I’ve featured them and the tiger beetles found there (though not nearly as rare as celeripes) in several previous posts.

  3. DougT says:

    Ted, this was an excellent and very enjoyable series recounting your exciting trip. The fire question is indeed complicated. Interesting that you cite Ron Panzer’s paper. Ron has been very much a mentor to me on prairie insects. We go back a couple of decades.

    • Thanks, Doug – I’m glad you enjoyed it. It was an amazing 2-week run that exceeded all expectations, quite incredible considering how slow it started out at Four Canyon Preserve (although I’ve got lots of great pics of other things from there that I’ll be featuring in future posts).

      The common complaint by ecologists in response to entomologist’s concerns over fire impacts is “show me the data” – difficult to do since most of the remaining prairie relicts have already been burned (especially small ones at the eastern edge of the prairie biome). Ron Panzer’s paper nicely objectifies these concerns and identifies attributes that are highly predictive of negative postfire response. All of these attributes (remant-dependence, upland inhabitance, and nonvagility) seem to apply to celeripes. His data also show that recovery of these burn-sensitive invertebrates can be substantial within a year and virtually complete within 2 years – as long as unburned parcels are maintained contiguous to the burned parcels. This is where it gets complicated, since rotational burning becomes difficult on small relicts, yet it is precisely on these small parcels that burn-sensitive invertebrates are most vulnerable to localized extirpation. Ron must have been a great influence on you.

  4. Chris Brown says:

    Ted, It was great to feel the thrill again of finding celeripes through your article. I enjoyed it immensely.

    • You more than anyone knows the thrill and excitement of that moment! I think it has to be the most exciting find I’ve ever experienced – probably because of our persistence despite our previous unsuccessful attempts.

  5. Matt Brust says:

    Man, now you have to come here and find it in Nebraska! By the way, I’ve had some interesting finds for Cicindela pulchra of late in South Dakota.

    • Hi Matt. I was skeptical about it occurring in Missouri, but now knowing that it does occur here I am willing to bet it is still in Nebraska. Chris and I will likely be up in northeast Missouri quite a bit next June – a quick hop over the river to “rediscover” it in Nebraska would be very tempting🙂

      I heard you and Steve had some great finds in WY/SD this past weekend. I’d love to get up there next summer and do some collecting with you.

  6. Matt Brust says:

    I just got back from a several-day trip to South Dakota and Wyoming. I have now found Cicindela pulchra at:
    7 sites in Fall River County (South Dakota), 1 site in Custer County (SD), 2 sites in Pennington County (SD), 2 sites in Butte County (SD), and 1 site in Weston County (Wyoming). I also got a decent series of C. decemnotata north of Rawlins, Wyoming. A stop at Pole Mountian (SE of Laramie) revealed enormous numbers of C. limbalis and hybrid C. nebraskana x longilabris. Take care.

    • Sounds like it was a great trip! Wish I could’ve done it with you, but with some travel coming up in July it wasn’t possible to get away for a week in June also. This weekend I’m going back up to the Loess Hills in northwest MO to look for more celeripes sites.

  7. Pingback: Dromochorus pruinina is not extirpated in Missouri… yet! « Beetles In The Bush

  8. Dave Rogers says:

    Great story! I’d sure like to find C. celeripes in SE Nebraska. I’m planning to look in the Pawnee Prairie WMA in Pawnee Co. Steve told me Matt looked there a couple times unsuccessfully but I’m going to look again this year. I enjoy your articles very much Ted.

    • I’m sure the species still exists in SE Nebraska. I can’t tell you how many times I looked for it in NE Missouri, but after I finally saw the species in the field in Iowa and Oklahoma I found it in Missouri the very next time I looked for it.

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