72 posts · 78,927 views
I am David Steen, Ph.D. I conduct research primarily pertaining to the ecology and conservation biology of reptiles.
By Jon Hakim
Make sure to start at Part I.
“Snake call! It's the python. Are you up? We got a call for the python.”
The words were almost the same, but I woke up to see that
Caesar's face held a grimace. The
call he feared had come.
Let's back up to the night before.
In the last post I left you in a moment of triumph. Kanai had led four of us right to our
target species... Read more »
Rahman, Shahriar Caesar, & et al. (2013) Monsoon does matter: annual activity patterns in a snake assemblage from Bangladesh. The Herpetological Journal, 203-208. info:/
Hello, our names are Sara Bresse and Nadeen Masarweh, and we are 5th year biology students at San Diego State University in California. This is our first time writing a blog post, and as a research assignment for our experimental ecology course, we observed turtle activity at our turtle pond on campus. Throughout the course of this semester we have conducted a few ecological class research ... Read more »
/... Read more »
Jachowski, D., Dobony, C., Coleman, L., Ford, W., Britzke, E., & Rodrigue, J. (2014) Disease and community structure: white-nose syndrome alters spatial and temporal niche partitioning in sympatric bat species. Diversity and Distributions. DOI: 10.1111/ddi.12192
Eastern Spotted Skunk
By David Jachowski
One of the rarest and most secretive mammals in North America might be a skunk. Not your average backyard, dumpster-loving Striped Skunk (Mephitis mephitis) that causes you to hold your breath after passing an overnight road kill on your morning commute. I am talking about the smaller and perplexingly rare Spotted Skunk (Spilogale putorius).... Read more »
Gompper, M.E., & Hackett, H.M. (2005) The long-term, range-wide decline of a once common carnivore: the eastern spotted skunk (Spilogale putorius). . 2005, 195-201. DOI: 10.1017/S1367943005001964
Jones, K.L., & et al. (2008) Sudden increase in a rare endemic carnivore: Ecology of the island spotted skunk. Journal of Mammalogy, 75-86. DOI: 10.1644/07-MAMM-A-034.1
Lesmeister, D.B., & et al. (2012) Landscape ecology of eastern spotted skunk in habitats restored for red-cockaded woodpeckers. Restoration Ecology, 267-275. info:/
Our extinction crisis continues; 2013 allowed us to safely conclude that we will never again see the animals listed below (2012 version here).
One of the last known photos ofa Formosan Clouded Leopard;
taken by Torii Ryūzō.
The Formosan Clouded Leopard (Neofelis nebulosa brachyura) of Taiwan is now thought to be extinct. None have been seen in over thirty years, despite a recent and ... Read more »
Soto-Azat C, Valenzuela-Sánchez A, Collen B, Rowcliffe JM, Veloso A, & Cunningham AA. (2013) The population decline and extinction of Darwin's frogs. PloS one, 8(6). PMID: 23776705
"We just found one of our Kingsnakes doing something really cool."
It was 2006 and we had recently started radio-tracking about a dozen Kingsnakes (Lampropeltis getula) in a big chunk of longleaf pine forest in southwestern Georgia. Kingsnakes were fascinating to me because they were a big, recognizable species for which we knew next to nothing. In fact, this was ... Read more »
Steen, D.A., Linehan, J.M., & Smith, L.L. (2010) Multiscale habitat selection and refuge use of common kingsnakes, Lampropeltis getula, in southwestern Georgia. Copeia, 227-231. DOI: 10.1643/CE-09-092
C.T. Winne, & et al. (2007) Enigmatic decline of a protected population of eastern kingsnakes, Lampropeltis getula, in South Carolina. Copeia, 507-519. DOI: 10.1643/0045-8511(2007)2007[507:EDOAPP]2.0.CO;2
Some observations come before you realize how important they are. Only later do you slap your forehead and realize that you should have taken more detailed notes, because the likelihood of you seeing such a thing again is slim. This is why I encourage everybody interested in wildlife to take down field notes.
When I was in high school, every afternoon when I got home I would take a ... Read more »
S. P. Graham. (2013) How frequently do Cottonmouths (Agkistrodon piscivorus) bask in trees?. Journal of Herpetology, 428-431. DOI: 10.1670/12-082
Plastic Dinner. Photo by Alex Bond.
Imagine carrying around several kilos (or
pounds) of plastic in your stomach, unable to rid yourself of it, and gradually
adding pieces day by day. This is
what many marine animals go through every day. Millions of pieces of plastic enter the world’s oceans each
day, and once it’s there, it doesn’t go away. Instead, it breaks into smaller and ... Read more »
Bond, A.L., J.F. Provencher, R.D. Elliot, P.C. Ryan, S. Rowe, I.L. Jones, & G.J. Robertson S.I. Wilhelm. (2013) Ingestion of plastic marine debris by Common and Thick-billed Murres in the northwestern Atlantic from 1985 to 2012. Marine Pollution Bulletin. DOI: 10.1016/j.marpolbul.2013.10.005
Bond AL, & Lavers JL. (2013) Effectiveness of emetics to study plastic ingestion by Leach's Storm-petrels (Oceanodroma leucorhoa). Marine pollution bulletin, 70(1-2), 171-5. PMID: 23507234
Avery-Gomm S, O'Hara PD, Kleine L, Bowes V, Wilson LK, & Barry KL. (2012) Northern fulmars as biological monitors of trends of plastic pollution in the eastern North Pacific. Marine pollution bulletin, 64(9), 1776-81. PMID: 22738464
Like many other people these days I finally succumbed to the allure of social media and created a personal Facebook page; the main benefit for me is that it has allowed me to hear from lots of old friends. Another benefit is getting tagged in those, "Hey what is this critter?" posts I'm sure all other biologists probably get. Usually, the critter ends up being some spider in a garage or a ... Read more »
K.M. Enge, D. J. Stevenson, M. J. Elliot, & J. M. Bauder. (2013) The historical and current distribution of the eastern indigo snake (Drymarchon couperi). Herpetological Conservation and Biology, 8(2), 288-307. info:/
Photo By Dave Lonsdale, Wikimedia
Last week Slate ran a piece in their Wild Things blog
entitled, “Green Anacondas in the Everglades: The Largest Snake in the World has Invaded the United States.” Obviously the sensational headline caught my attention as did the subtitle, which refers to this invasion as "unstoppable." However, after reading the actual article I realized that it was ... Read more »
Diffie, S., Miller, J, & Murray, K. (2010) Laboratory Observations of Red Imported Fire Ant (Hymenoptera: Formicidae) Predation on Reptilian and Avian Eggs. Journal of Herpetology, 294-296. DOI: 10.1670/08-282.1
Dorcas ME, Willson JD, Reed RN, Snow RW, Rochford MR, Miller MA, Meshaka WE Jr, Andreadis PT, Mazzotti FJ, Romagosa CM.... (2012) Severe mammal declines coincide with proliferation of invasive Burmese pythons in Everglades National Park. Proceedings of the National Academy of Sciences of the United States of America, 109(7), 2418-22. PMID: 22308381
Rhoades RB, Stafford CT, & James FK Jr. (1989) Survey of fatal anaphylactic reactions to imported fire ant stings. J Allergy Clin Immunol., 159-162. DOI: 10.1016/0091-6749(88)90373-9
By Brian Folt
The skies were blue, the water was beige, and the sun was basically white on a September Monday in Macon County, Alabama. Turkey Vultures soared above and Cricket Frogs skipped below as I made my way down a dried-up dirt road, heading down to the river. I was leading the Auburn University Vertebrate Biodiversity class to catch stream fishes, and I was mighty content.
... Read more »
Agkistrodon piscivorus, and
Copperheads, Agkistrodon contortrix,
are venomous snakes that are closely related and frequently encountered in the United States.
Because these two species may seem similar at first glance, they are often
confused for one another. I first noticed this trend on Twitter; if you follow me there then you already know that I am ... Read more »
X. Glaudus, K.M. Andrews, J.D. Willson, & J.W. Gibbons. (2007) Migration patterns in a population of cottonmouths (Agkistrodon piscivorus) inhabiting an isolated wetland. Journal of Zoology, 119-124. DOI: 10.1111/j.1469-7998.2006.00232.x
E.A. Eskew, J.D. Willson, & C.T. Winne. (2009) Ambush site selection and ontogenetic shifts in foraging strategy in a semi‐aquatic pit viper, the Eastern cottonmouth. Journal of Zoology, 179-186. DOI: 10.1111/j.1469-7998.2008.00527.x
When I lived in Wisconsin's North Woods, my favorite walk was a path that skirted the shore of one of the area's many kettle lakes. I walked it in all kinds of weather, at all times of year, and saw all sorts of interesting things as a result. One of my favorite memories of that lake is the time I got to observe a beaver hard at work doing beaver things: the sound of bubbling and splashing ... Read more »
E. Wohl. (2013) Landscape-scale carbon storage associated with beaver dams . Geophysical Research Letters, 40(14), 3631. DOI: 10.1002/grl.50710
H.A. Cooke, & S. Zack. (2008) Influence of beaver dam density on riparian areas and riparian birds in shrubsteppe of Wyoming. Western North American Naturalist, 68(3), 365-373. DOI: 10.3398/1527-0904(2008)68[365:IOBDDO]2.0.CO;2
C.E. Stevens, C.A. Paszkowski, & A. L. Foote. (2007) Beaver (Castor canadensis) as a surrogate species for conserving anuran amphibians on boreal streams in Alberta, Canada. Biological Conservation, 1-13. DOI: 10.1016/j.biocon.2006.07.017
We have often discussed here on this blog how and why killing snakes whenever and wherever you see one is a questionable land ethic. But, in the past I conceded that I understand why people would kill venomous snakes when they are found in their backyards because of the perceived threat to their families. Prompted by some comments left on a recent blog post, I’ve reflected on this a bit ... Read more »
N. Morandi, & J. Williams. (1997) Snakebite injuries: contributing factors and intentionality of exposure. Wilderness and Environmental Medicine, 152-155. DOI: 10.1580/1080-6032(1997)008[0152:SICFAI]2.3.CO;2
O'Neil ME, Mack KA, Gilchrist J, & Wozniak EJ. (2007) Snakebite injuries treated in United States emergency departments, 2001-2004. Wilderness , 18(4), 281-7. PMID: 18076294
H. M. Parrish. (1966) Incidence of Treated Snakebites in the United States. Public Health Rep, 81(3), 269-276. DOI: 10.2307/4592691
In my first post to this blog, I made the ecological case for returning the top predators, wolves and cougars, to the eastern United States. I argued that the eastern ecosystem needed their star actors to make it all work. In ending, I posed several questions that needed to be addressed beyond the ecological necessity of bringing back cougars and wolves. The first of these was: Can wolves ... Read more »
John Laundre. (2013) The feasibility of the north-eastern USA supporting the return of the cougar Puma concolor. Oryx, 47(1), 96-104. DOI: 10.1017/S0030605311001475
By Jim Godwin
It’s the end of another season of monitoring of the Eastern Indigo Snake reintroduction project in Conecuh National Forest. During the winter months biologists and experienced volunteers have been systematically scouring the sandhills and longleaf forest for indigo snakes, using Gopher Tortoise burrows as cues in their searches. With the close of this round of ... Read more »
By Brian Folt
Growing up, a summer-time ritual in our family was to visit the zoo. Most of my younger years were spent growing up in the greater Detroit, Michigan area, and the Detroit Zoo was a staple in our summer circuit of activities. While visiting the zoo during the dog days of summer, my favorite exhibit to see, without a doubt, was the Penguin House. These strange little birds had... Read more »
Chazdon R.L., C.A. Harvey, O. Komar, D.M. Griffith, B.G. Ferguson, M. Martínez-Ramos, H. Morales, R. Nigh, L. Soto-Pinto, M. van Breugel.... (2009) Beyond reserves: A research agenda for conserving biodiversity in human-modified tropical landscapes. Biotropica, 142-153. DOI: 10.1111/j.1744-7429.2008.00471.x
Bradshaw, C.J.A., N.S. Sodhi, & B.W. Brook. (2009) Tropical turmoil: A biodiversity tragedy in progress. Frontiers in Ecology and Evolution, 261-267. DOI: 10.1890/070193
Folt, B., & K.E. Reider. (2013) Leaf-litter herpetofaunal richness, abundance, and community assembly in mono-dominant plantations and primary forest of northeastern Costa Rica. Biodiversity and Conservation, 2057-2070. DOI: 10.1007/s10531-013-0526-0
We know that some reptiles love the water. Alligators,
turtles, snakes, the swamps are crawling with them. But what about the ocean?
Are there any reptiles that use saltwater habitats?
Of course. Sea turtles are well-known for spending their lives in the ocean (aside
from their brief trips to the beach to lay eggs). Not technically a sea turtle
... Read more »
H.B. Lillywhite, C.M. Sheehy III, & F. Zaidan III. (2008) Pitviper scavenging at the intertidal zone: an evolutionary scenario for invasion of the sea. BioScience, 58(10), 947-955. DOI: 10.1641/B581008
By David Jachowski
Who would marry a Hellbender? The name itself sounds unreputable at best, like a biker gang turned rock band. The reality is perhaps worse, an oversized soft and slimy salamander, with a nickname of “old lasagna sides.” But to be married to a Hellbender, or better yet one of the world’s leading experts on Hellbenders (Cryptobranchus alleganiensis), means you spend lots ... Read more »
Jachowski, C. M. Bodinof, & Hopkins, W. A. (2013) Cryptobranchus alleganiensis alleganiensis (Eastern Hellbender). Aggregate Behavior. Herpetological Review, 44(2), 292. info:/
Bodinof, C.M., J. T. Briggler, R. E. Junge, T. Mong, J. Beringer, M. D. Wanner, C. D. Schuette, J. Ettling, & J. J. Millspaugh. (2012) Survival and body condition of captive-reared juvenile Ozark Hellbenders (Cryptobranchus alleganiensis bishopi) following translocation. Copeia, 2012(1), 150-159. DOI: 10.1643/CH-11-024
I have recently heard from two independent sources that a cottonmouth and a water moccasin are "in fact" two different snakes. Both stated that coloration, body size/shape, habitat, and swimming behavior were the differentiating traits. I was taken aback by both accounts, never before hearing this in any of my herpetology classes or seeing this for myself in the field. Afterwards, my first ... Read more »
Guiher TJ, & Burbrink FT. (2008) Demographic and phylogeographic histories of two venomous North American snakes of the genus Agkistrodon. Molecular phylogenetics and evolution, 48(2), 543-53. PMID: 18539486
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