One of the nice things about working in evolutionary biology (or any of the related, indistinguishable-for-all-practical-purposes Wild Thing Sciences) is that I was connected to a great number of cool people working on a great number of very cool creatures, in a great number of very cool places. Furthermore, the bureaucrats controlling modern-day Wild Thing Science are safety-paranoid enough that everyone doing "fieldwork" (working in the wild) must bring at least one buddy. That's one of the reasons I always brought volunteers on my trips, and why Wild Thing Scientists are constantly advertising for volunteers. If you're willing to work without getting paid there are many cool opportunities to work with a variety of wild animals worldwide. I know one evolutionary biologist who works solely on theory - all she needs to do her job is a working computer, essentially - but she travels the world going to exotic places and seeing incredible animals simply by tagging along with other biologists. It's actually an enviable system, as the "work" parts of fieldwork, like conducting experiments, collecting and preserving samples, and even just finding whatever animal you've decided you'd like to study, can be incredibly challenging, time-consuming, stressful and expensive. But tagging along on someone else's fieldwork? All the cool parts, none of the stresses!
This brings me to Dave. Dave is a friend of mine, and Scottish, which is why, when he got married, I got to wear a kilt. It was among the more exciting experiences of my life:
Dave is doing his PhD on Tasmanian Devils, one of the coolest mammals around. I took the opportunity to be a volunteer during his fieldwork, and for a week I got to go out every day and see Tasmanian devils in the wild!
Dave is working in the far north-west corner of Tasmania, where the facial tumour disease is still spreading into healthy devil populations. If you haven't heard of the devil facial-tumour disease, and the destruction it has wrought on the world's last Tasmanian devils, check this out.
Dave catches devils by setting traps for them. Each trap is a big PVC pipe blocked at one end, with a door at the entrance and a piece of meat dangling at the back of it. Here's what a trap looks like set, ready and waiting for a hungry devil to come along:
Inside the trap, the meat is dangling by a string at the very back. The string is tied to a pin which is holding the door open. The devil enters the trap, grabs and pulls on the meat, the meat pulls the string, the string pulls the pin, the pin lets go of the door and the door falls, trapping the devil inside.
To ensure that the devils spend as little time in the traps as possible, Dave and his volunteers get up before the crack of dawn and drive out to his field site to check the traps. This is what they hope to find:
Sometimes the initial excitement about a devil in a tube is unfounded: devils aren't the only predators prowling Tasmanian forests at night, and Dave sometimes has to deal with bycatch. If the bycatch is a tiger quoll, that's just icing on the devil's cake. Tiger quolls are another spectacular Australian marsupial currently going extinct, and getting to see one in the wild is just as much a privilege as seeing a wild devil. However, sometimes Dave catches feral cats, which are harbingers of death to native Australian animals and destruction to the Australian wilderness. Dave takes cats to be euthanized by a local veterinarian.
Sometimes traps are closed with nothing inside. I like to think this is the result of Tasmanian tigers, because they'd be so big that they wouldn't fit completely in the trap, which would prevent the trap door from closing on them. More likely than not, though, it's due to trap malfunction or some other mundane explanation.
If the closed trap proves to contain a devil, now, for better or for worse, you have a devil in a tube. This may seem like a challenge, and devils do have a reputation for being scrappy little balls of teeth and claws, but I learned by watching Dave that as long as you handle them with care and precision they're actually really calm. I watched Dave take measurements from a lot of devils and never once did one try to bite him or scratch him. This is as much to Dave's credit as a professional wildlife biologist as it is to the devil's relative docility: handling wild animals, especially ones with sharp teeth and massive jaw muscles, is not for the uninitiated.
The first step of processing a devil is, of course, to get it out of the tube. To do this, the tube is lifted and tilted, the door opened, and the devil slid gently into a burlap sack:
Once the devil is in the burlap sack, it generally stays pretty calm. Dave manipulates the devil-within-the-sack into different positions so that he can inspect it, determine how healthy it is, determine if there's any evidence of the facial tumour disease, and take various measurements:
Dave also inspects the female's pouch to see if they're currently nursing:
Tasmanian devil pouches: the pouch on the left belongs to a female without pups, the pouch on the right to a female with pups.
Finally, Dave takes a look at the devil's business end: its jaws. Tooth wear is a good way to estimate the age of a devil, as it is to estimate the age of a lot of mammal species. And around the jaws are where any signs of facial tumours will turn up, though the population Dave was working on when I visited had never had any evidence of devils with the facial tumour disease. Here's an inspection of the jaws of a healthy devil:
Dave, and all Tasmanian devil researchers and conservationists, are very concerned about the potential for humans to spread the facial tumour disease between devils. Notice that Dave is wearing disposable latex gloves: those go into the garbage and are replaced in-between each devil. Dave and all the volunteers also use alcohol disinfectant gel in-between each devil just to be safe. A brand new burlap sack is used for each devil. And after the devil is removed from a trap, the trap is thoroughly washed and disinfected before being reset: another job for volunteers!
Finally, it's time for the fun part! After being processed, the devils are released into the woods. The process of getting them free of the sack can be cumbersome, and is an opportunity for pictures to be taken with a devil! Usually, however, the devil takes off like a bat out of hell:
But, there's that rare occasion where the devil pauses for the briefest of moments to say goodbye, and, if you're lucky enough to have a photographer (another volunteer job!) quick on the shutter, it can be captured for all eternity:
Photos by Connie Leon.
Helping Dave work with Tasmanian devils in the wild was an experience of a lifetime. And he's looking for more volunteers!