internship

Species of August: Timber Rattlesnake

by Raymond Gonzo

Part of the Tetrapod collection holds preserved reptiles, most of which represent native Ohio species along with several species from other parts of North America. To find a Species of the Month, I ventured down the aisles of shelves with jars of snakes, lizards, turtles, and tortoises. When I saw this Timber Rattlesnake, one of our collection’s most impressive reptilian specimens, I made my choice. I chose an animal that is feared, and misunderstood, by many.

Attaining an average length of about 3-4 feet, the Timber Rattlesnake (Crotalus horridus – a frightening name for an animal that rather avoids than seeks conflict) is a fairly large snake. Like most snakes, Timber Rattlesnakes are feared by a lot of people who don’t understand them well enough. It’s important to remember that snakes such as the Timber Rattlesnake don’t seek out conflict with humans, but rather try to avoid it. A part of the fear people have for snakes comes from common misconceptions, which these facts below will hopefully clear up.

Their range stretches throughout most of the temperate forests in the Eastern United States and Canada, however they can no longer be found in Maine and Ontario. Here in Ohio, they can really only be found at the southern end of the state. Timber Rattlesnakes will mate during the spring and fall with the females giving birth to anywhere from 4-14 young during the late summer. What’s interesting about rattlesnakes (Timbers included) is that they give birth to live young, which is very unusual for a reptile. Many reptiles, just like birds, usually lay eggs from which their young hatch after some incubation time. When the snakes feel threatened, Timber Rattlesnakes will rattle their iconic tails as a warning to potential predators that get too close. These snakes eat a wide assortment of small mammals and can sense their prey using special heat sensory organs that are located on their heads. These sensory organs are known as loreal pits and are a characteristic common to all members of the pit viper family, which includes rattlesnakes.

When Timber Rattlesnakes deliver a bite, deadly venom will be injected through the snake’s hollow fangs and into the victim. A common misconception is that snakes are poisonous; when in actuality they are venomous. Venomous organisms directly inject venom into the victim whereas poisonous organisms have a poisonous substance covering their body making them dangerous only when eaten or touched. Learn more general facts about Timber Rattlesnakes from an Ohio Certified Volunteer Naturalist.

Quite a bit of research has been done on these snakes, a few years ago Rokyta et al (2013) reported that components of their venom seem to have changed. Some species of snakes (Timber Rattlesnake included) have undergone a dramatic shift in the lethality, and composition of the venoms they produce. Traditionally, Timer Rattlesnakes produced a hemorrhagic type of venom, which causes the snake’s victims to bleed to death from the inside out (visit the Snakes and Spiders web site for a full description of how snake venom works). However, this study shows that, at the southern end of their range, Timber Rattlesnakes are beginning to develop a bite consisting of neurotoxin venom. Neurotoxins attack the victim’s central nervous system resulting in cardiac arrest and trouble breathing thus making it much deadlier than hemorrhagic toxins. Similar research on the evolution of snake venoms is being done at the molecular level by researchers in the Gibbs lab here at OSU.

Timber Rattlesnakes are amazing animals that encompass both beauty and lethality. Their status as a top predator has even landed them a place in history as the species of snake that appears on the “Don’t Tread on Me” flag. While these are highly venomous creatures, it’s important to remember that they just want to be left alone and do their best to avoid conflict with humans. Should a Timber Rattle snake bite you or someone you are with then please follow the procedures outlined by the Wild Backpacker to ensure a safe and speedy recovery from any venom related injuries. If you ever encounter a Timber Rattlesnake NEVER try to approach or pick it up, instead leave it alone and in turn it will leave you alone. Timber Rattlesnakes remind us that sometimes it best to admire natural beauty from a distance.

References

“Snake Bite First Aid and Treatment.” Wild Backpacker – Survival articles
http://www.wildbackpacker.com/wilderness-survival/articles/treating-a-snake-bite

Rokyta D.R., Wray K.P., and Margres M.J. 2013 The Genesis of an Exceptionally Lethal Venom in the Timber Rattlesnake (Crotalus Horridus) Revealed through Comparative Venom-gland Transcriptomics. BMC Genomics 14, 394. BioMed Central. http://www.biomedcentral.com/1471-2164/14/394/

“Understanding Snake Venom and How It Works.” Snakes and Spiders, 3 Nov 2009.
http://www.snakesandspiders.com/understanding-snake-venom-works/

Species of July: Indiana Bat

Three Indiana Bat skins from the Tetrapod Collection.

Indiana bats from the Tetrapod Division

by Raymond Gonzo

There’s nothing like being outdoors on a warm summer night. The sunset, the fireflies, a barbeque all make summer nights truly magical. However, there is an important part of the summer night that you won’t hear too many people reminiscing about, bats flying overhead. Bats though play an important role in making these summer nights so pleasant and memorable, they feast on mosquitoes and help keep their numbers in check.

Here in the Tetrapod collection, we have several species of bats that have been preserved and placed in a glass container with labels for each individual so that we can show them to visitors. While any of the species that we have would make for interesting conversation, I feel that it would be most interesting to discuss a species of bat that is both unique and important to the Midwest and Ohio, the Indiana Bat.

Weighing the same as approximately three pennies and with a wingspan just under one foot, the Indiana Bat (Myotis sodalis) is quite small . Despite being small, these bats can have a large impact: they are capable of eating half their body weight in insects per night and when you do the math, a bat can eat 3.75 g of mosquitoes which amounts to roughly 1,500 mosquitoes at 2.5 mg each. Thus bats are highly valuable in pest control. Like all bats, the Indiana Bat will hibernate during the winter when there are no insects to be found. These bats hibernate in very large clusters and, like their Latin name (sodalis, meaning companion) implies, are very social. When hibernating bats slow their metabolism, heart rate and breathing rate to extremely low levels to conserve energy. Given that they cannot refuel during the cold months, their energy reserves are finite and any unnecessary movement will cause them to burn more of their fat reserves than they can afford to lose. Thus during hibernation, bats absolutely cannot be disturbed. This will cause the bats to starve and die before the warmer weather with replenished food supplies returns. To find out more about the Indiana Bat in particular, you can visit the U.S. Fish and Wildlife Service’s website.

The Indiana bat, has been endangered since 1967. One of the reasons is disturbance during hibernation. There are a few different causes for disturbance of the bats’ hibernation, but the biggest threat nowadays may be white-nose syndrome.

The white-nose syndrome is a fungus that was introduced to North American caves by European spelunkers sometime in the early 2000’s. The fungus causes a white patch to grow on the bats’ nose, hence the name; this irritates the bat and may alter its behavior. Bats with this syndrome have been observed flying around in the middle of the winter, burning more fat than they normally would, which ultimately leads to death by starvation. This disease has already killed millions of bats across the U.S. and Canada and according to some researchers, it may continue to do so before we will see improvement.

According to a study conducted by Wayne E Thogmartin et al (2013) the population of the Indian Bat will be ravaged by white-nose syndrome over the next century. The study conducted was able to predict the rate at which bats will die off should conditions continue as they are, and they’ve found that the Indiana Bat will survive into the next half century, but at greatly reduced numbers. There is, however, the chance that the bats will develop immunity to the fungus, which could turn things around.

Bats of all species (the Indiana bat included) are dying due to the white-nose fungus’ rapid advancement. If we lose these bats, then we lose a very effective regulator of insect populations. The good news is that there are many ways you can help bats, starting in your own backyard in order to make it more inhabitable for bats. You can also support an organization that is working to save bats (e.g. the organization for bat conservation), and you can attend programs to learn more about bats.

At OSU Marne Titchenell, Wildlife Extension Program Specialist has studied bats and knows about their ecology and management. Marne and other naturalists periodically give talks on bat conservation at local metro parks. This weekend, join a Journey into Nature with Bats at Glacier Ridge Metro Park on Saturday July 25th at 8pm or take a bat walk at Blacklick Woods Metro Park on July 31st. Happy bat watching!

References

Thogmartin W.E., Carol A.S.R., Szymanski J.A., McKann P.C., Pruitt L., King R.A., Runge M.C., Russell R.E. 2013 White-nose Syndrome Is Likely to Extirpate the Endangered Indiana Bat over Large Parts of Its Range. Biological Conservation 160, 162-72. http://www.sciencedirect.com/science/article/pii/S0006320713000207

“Indiana Bat (Myotis Sodalis).” USFWS: Indiana Bat (Myotis Sodalis) Fact Sheet. U.S. Fish and Wildlife Service, 18 May 2015. http://www.fws.gov/midwest/endangered/mammals/inba/inbafctsht.html

“White-Nose Syndrome (WNS).” USGS National Wildlife Health Center –. U.S. Geological Survey, 13 Mar. 2015. http://www.nwhc.usgs.gov/disease_information/white-nose_syndrome/

Bruce, Heidi, and Shannan Stoll. “How to Save Bats in Your Own Backyard.” YES! Magazine. YES! Magazine, 17 July 2012. http://www.yesmagazine.org/issues/making-it-home/how-to-save-backyard-bats

Observations from the Freshman-Brought to you by Raymond

If I said that I had planned to work at The Ohio State University’s Museum of Biological Diversity from the beginning of my college career, I’d be lying. If I said that I was aware of the museum’s existence before last October, I’d still be lying (I know. I’m just the worst).

If I were to spin a yarn about how I first got started at the museum, it would begin last semester when I was frantically searching for an undergraduate research position. As a zoology major entering my third year of college, I thought to myself, I should probably start getting zoology work related experiences to put on my resume and undergraduate research seemed the most appealing. The problem is that Sasquatch is easier to find than a professor doing zoology-related research and who is looking for an undergraduate to participate. So after much searching, emailing, crying, etc… I asked the undergraduate research office where I could go to find said professors looking for undergraduate workers. They replied that most of researchers could be found, or have an office at the University’s Museum of Biological Diversity.

Upon hearing this, my initial thought was, “We have a Museum of Biological Diversity?” My second thought was, “We have a Museum of Biological Diversity and I’m just hearing about this now?”  I took a bus out to Carmack Corner, walked up a dirt road and found this place on the very edge of the University’s land. When I first discovered the museum, I was so incredibly intrigued and excited about what could be inside. Upon further investigation however, I was incredibly disappointed to see it wasn’t an “actual” museum but more akin to the warehouse from the end of Raiders of the Lost Ark.

A picture of OSU's Museum of Biological Diversity. A very plain looking brick building.

There is the building in all its glory. When I say that this museum is out of the way, I mean it is really at the far western end of campus.

It wasn’t until the beginning of this semester that I had heard about the museum’s annual open house. I had been told that this is the one day of the year that the museum resembles the general public’s view of what an actual museum rather than a warehouse, so I decided to attend. The open house was a wonderful experience for a zoology major, such as myself. After entering the building, I was soon surrounded by specimens of exotic and colorful birds and skeletons from a wide variety of different animals. After seeing all this awesome stuff, I thought to myself, “Gosh wouldn’t it be just swell to work/intern/volunteer here?” So I had met with the curator, Dr. Angelika Nelson, and began to volunteer my time labeling and organizing specimens in the museum’s Tetrapod collection.

So it’s been a little over a month since I started at the museum (I refer to myself as a freshman for a reason) and now I have a chance to really look back and reflect on what I’ve done so far. All that I’ve really done (again, I’ve only been here a month) is print labels, organize loans, do some geo-referencing and maybe (if I should be so lucky) count how many 100-year old hummingbirds we have in our collection. Make no mistake; museum work is not for everybody. At times it can seem like long, tedious and mind-numbingly boring work.

But I love every minute of it.

I’m sure that if the average person were to come to the museum and try to do what it is that we do there, they’d either recoil in disgust or fall asleep from boredom. And that’s fine, it’s not everybody’s cup of tea. For me however, working at the museum is one of the greatest jobs I’ve ever had. Animals, in general, just wholly fascinate me and I grew up watching the old Animal Planet. When I printed labels for specimen cabinets, I got to look at some of the most exotic and unique bird species I’ve ever seen. Not to mention that I got to touch three of the endangered bird species the Tetrapod collection possess: an Ivory-Billed Woodpecker, a Passenger Pigeon and a Carolina Parakeet (I can die happy now). Working there is basically nirvana for a guy like me.

A head on picture of the Tetrapod Collection's Ivory Billed Woodpeckers.

Not going to lie… These are the most exciting specimens I have seen so far.

While working at the museum is incredibly fascinating and fun, I’d be lying (again) if I said there was only one reason why I love it there. Going into the museum and doing all this science-related work makes me feel like I’m getting closer to actually being a zoologist. For anyone who is a zoology major at OSU, I don’t need to tell you how difficult the major program is. I spent the first two years of college trying my absolute hardest just to get through the math requirements (don’t even get me started on that ungodly chemistry program). So working here (along with actually doing major courses) makes me feel as though I’m becoming a “big kid” in my field.

I’ve often said that the greatest decision that I ever made was joining the Boy Scouts. However, I think I may have topped myself by choosing to work at this museum. I love the work that I do in the Tetrapod collection and it helps me feel as though I’m actually doing something worthwhile with my time. If you’ve enjoyed reading about my experiences, then you’re in luck. My latest responsibility for the museum is to write more of these blog posts, so the fun never has to end. Until next time dear reader.

Raymond is one of our newest volunteers in the Tetrapod Collection who will be interning with us this coming fall. His current projects here included working with our amphibian and reptile collection.