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Field work with Nature Live

2 Posts tagged with the insect tag
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At the field station on St. Mary’s I find Martin Honey, an entomologist who works on lepidoptera. He shows me his moth trap, which is a circular vessel filled with empty egg cartons with a glass lid and a large light bulb in the middle (in other words, it looks a bit like a big rice cooker with a light bulb sticking out of the top!).

moth-trap-600.jpgMartin's moth trap in a shady area at the field station. Awaiting winged nighttime visitors.

 

Martin tells me that when he switches on the bulb - which is mainly ultraviolet light - at night, the moths are attracted and once inside, they can rest on the egg cartons until he collects them in the morning. Martin keeps the trap in shady places so that the moths don’t get too hot in the sunlight. He shows me a few specimens that are inside and says he has just freed quite a lot so if I come back tomorrow he will keep some for me to draw.

 

Martin shows me a specimen that he has put to sleep with a special liquid. The moth’s wings are closed, and I ask how the wings are kept open as we see in the museum collections. This proves to be a good question...

 

In the field work room we find Martin's microscope and a few dozen moth specimens. He tells me that the wings are set by hand, and proceeds to show me how this is done. He carefully takes a moth specimen with forceps and places it under the microscope alongside some pins, which are so small they are almost invisible!

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Moth specimens and pins at the microscope, ready for setting.

 

Martin looks down the microscope, controls the instrumental pins with forceps and begins to slowly open the wings… he arranges the legs at 45 degrees and makes sure the antennae are forward, then slowing impresses the pins into the foam to hold the posture that he has now created for the moth specimen. He makes it look effortless and I am inspired, it is really quite an artful practice.

 

Martin tells me he learned to set moth wings by hand at the Museum, and I am intrigued to hear more:

GA: Are all entomologists at the NHM expected to do this in their job description?

MH: Some people just cannot do this, it requires too much dexterity.

GA: So some scientists can do it, but are people employed just to do the setting, and in the past, has the NHM employed setting staff?

MH: Yes - there used to be a special room called the setting room in the NHM, and specially trained people just did that work. Now there are specialist setters in Prague, they are not scientists but mostly amateur entomologists. I may send the larger specimens there depending on their number and I might do some setting work when I retire, and challenge the Prague group!

live-specimens-550.jpgMartin gives me four live moth specimens found on St.Mary's. I will draw them and let them go afterwards.

 

Posted on behalf of Gemma Anderson, an artist and PhD researcher who accompanied Musuem scientists on a field work trip to the Isles of Scilly between 17 and 23 August 2013.

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Yesterday, our collaborators at Universiti Malaysia Sabah (UMS) warned Dan that some of his specimens were leaking.  Not good news!

 

All of the lichen and invertebrate specimens (collected over the past 6 weeks of sampling in the forests of Borneo) are now at UMS, waiting to be sorted and packed and eventually loaned to the Natural History Museum (NHM) for further study and identification.

 

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But the invertebrate specimens cannot be transported or stored safely while they are leaking alcohol (which acts to preserve the specimens) so it was all hands on deck this morning at UMS.

 

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The container the specimens had been stored in was swimming in alcohol.

 

On arriving at the university we discovered it was one container in particular that was causing the trouble.  Inside were specimens that had been collected by other NHM scientists in Danum Valley, but instead of being stored in tubes they had been sealed in plastic bags…that were meant to be leak-proof.  But the bags had failed and now there was alcohol swilling around the container producing a particularly bad smell!  Left in this condition the specimens would soon rot.

 

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The painstaking task of carefully emptying the bags and putting the contents into tubes.

 

So, one by one, the bags were opened and the contents removed and resealed in plastic, screw-top tubes.  A valuable lesson in the importance of reliable storing methods, without which weeks of collecting and hard work can be for nothing.  On the upside, it did give us the opportunity to see some different and interesting specimens including various ‘horned’ beetles, large cicadas and a crab!  The latter presumably having been collected close to a fresh water river.

 

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An unexpected discovery amongst the collected specimens.

 

But it wasn’t just Dan, Kerry and Keiron (with the added help of Tony) who were kept busy with attending to specimens today.  Elsewhere in the university, Pat and Holger had discovered one of the main difficulties with storing specimens in the tropics – humidity.   The specimens of lichens had been left in closed, plastic bags, and consequently moisture had collected and was causing the lichens to become damp.  A dangerous situation that can lead to the growth of mould and the loss of entire collections of samples.  Needless to say, everyone was kept busy for most of the day.

 

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Packing specimens for transportation involves lots of cardboard boxes and bubble-wrap!

 

Finally, once re-sealed and re-labelled, the invertebrate specimens were carefully packed by a removal company, ready for transportation to the UK.  Not the most common of courier requests!

 

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Dan was particularly pleased when the last box was sealed!

 

Having rinsed the smell of alcohol and dung beetles off of our hands, we decided to spend what was left of the day exploring the city.  Kota Kinabalu is clearly a busy and bustling city and well set-up for tourists, with a multitude of restaurants to choose from and markets selling memorabilia and gifts. And it doesn’t all stop when the sun goes down…in fact it gets better!  By the waterfront is a massive, open-air night market, selling vast quantities of fresh fruit and vegetables and a wide array of fish.   At some stalls, you can choose the fish you want and they will cook it for you, there and then.  We had to give it a try!

 

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One of the many stalls cooking fresh fish and seafood. 

 

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I think Kerry managed to trump my tasty but tiny prawn!