Trials From The Riverbank: Conserving a Taxidermy Otter

Written by Jen Gossman, MSc first year Conservation Practice student at Cardiff University.

Otter mount © Jen Gossman

I received a mounted taxidermy otter in still life pose without a base from the Tenby museum, Wales where it had been in long term storage wrapped in Tyvek. On initial examination it showed some skin shrinkage and was covered in a thick layer of dirt, grease and dust.

The main concern was an infestation by carpet beetles. Inspection of the fur and hide revealed evidence of the beetles in the form of fras, some dead or empty larvae casts and matted fur alongside large bald areas.

The decision was taken to send the otter to be frozen using industrial freezers with the valued assistance of Julian Carter from Amgueddfa Cymru (Cardiff), where it spent 3 weeks at -30 degrees wrapped in plastic sheeting and placed in a strong container to avoid freezer burn or contact with moisture. Once the otter returned, a detailed examination of the mount could be undertaken.

Otter examination in fume cupboard © Jen Gossman

The exact age of the mount could not be determined due to the lack of records but the potential of there being arsenic contamination, commonly used as preparation and an anti-pest measure prior to the 1980s, was likely.

In response to this I decided to examine the mount with surfaces covered using polyethylene sheeting and a fume cupboard, making sure to wear protective PPE whilst handling. For certainty and the safety of students and staff, we decided to undertake tests to ascertain the likely presence and potential contamination level of the mount by arsenic. I used the XRF machine and dab tests to sample common aggregation areas such as the feet, armpits and ear areas. Two tests were decided on to allow a holistic view of the mount.

Pest damage to underneath of mount © Jen Gossman

Alongside the general dirt levels and grease or debris on the surface layers of fur, underneath this and close to the hide, was found to have been warped by the potential actions of moisture or eaten and matted by pest action. The fur itself was severely degraded from fading and showed some embrittlement from this occurrence. There were various areas of the hide that had been subject to warping. This had potentially caused dislocation of the toes and warping of the jaw. It was decided not to address this as it had low impact on the mount at this time.

Due to Covid-19, the actual treatment of the mount has sadly been put on hold but the planned treatment is to clean and remove pest damage and dirt from the fur and attempt to recolour the mount to reflect a realistic appearance. I decided that recolouring was important as I feel that the purpose of a taxidermy mount of this type, is to represent as much as possible the real animal. Taxidermy either scientific or trophy most commonly has the purpose of allowing a closer understanding of nature, and may provide scientific value.  To maintain the validity of that experience the accurate appearance of the mount is important to our understanding. Re-colouring may hide history of the mount and will interfere with any scientific data but will enhance public experience, I feel that this opinion is important to consider when displaying taxidermy of extinct species.

The treatment of the pest damage on fur layers will be performed by delicate detangling and very light brushing of the hide with tweezers, pick and a soft brush. Matted fur being gentle tweezed apart followed by a soft brush and a filtered vacuum to pick up loose material.

Grease and ground in dirt will be removed with a mixture of 1:1 ethanol and deionised water. The solvent will allow the removal of the dirt and will retard the exposure of the mount to moisture from the deionised water which itself will reduce the excessive drying of the fur which could lead to embrittlement. A blotting paper guard will be used to prevent the solution from touching the hide directly. The solution is applied with a swab, working backwards through the fur in thin sections which are then brushed back to a life-like appearance. Once free of grease, dirt and pest debris, colouring can be performed.

The exact decision to proceed with this is the responsibility of the client museum but the process proposed will be to use a mixture of acrylic dyes and ethanol. These will be applied in very thin amounts via the controlled use of air spray methods applying thin coats working systematically over the hide using realistic colour pallets of brown auburn and umber tones to achieve a representative coat.

The mount is now snuggled up in our stores awaiting the return of the students and the commencement of the treatments.

Waiting in storage © Jen Gossman

CryoArks – Discover The UK’s First Zoological Biobank

Written by Andrew Kitchener, Principal Curator of Vertebrates, National Museums Scotland.

Many of us have probably been approached by eager PhD students and other researchers who want to snip a bit off those specimens or drill a few holes in others. As curators we start to feel somewhat uncomfortable about seeing our precious collections sliced and diced, and yet we are also keen to discover more about the genetic content of our specimens for their own sake. This is partly because collectively we can contribute to studies that benefit wild populations of species, including the conservation biology of many endangered species and the possibility of rewilding extirpated species. You may also have a chest freezer bursting with grip-seal bags or plastic tubes filled with tissue samples collected from specimens you have acquired, but you’ve no idea what to do with them, but you know they will be useful one day. Or maybe you have a freezer full of specimens you want to get rid of. CryoArks is a new initiative that just might help you to solve all these problems.

Sorting through lemur muscle samples at National Museums Scotland © National Museums Scotland

CryoArks is a BBSRC-funded project led by Professor Mike Bruford at Cardiff University, which has established the UK’s first comprehensive zoological biobank for research and conservation. CryoArks is a consortium of museums, zoos, academic institutions and biobanks, which is working together to establish common standards and working practices to store tissue and DNA samples and make them available on a common web portal, so that researchers and conservation biologists will be able to find out what is available for their research. This will help cut down on the sampling of our permanent collections by giving researchers something else to sink their scalpels into. CryoArks has two main sample storage hubs – at the Natural History Museum in London and at National Museums Scotland in Edinburgh – that currently house more than 65,000 samples, but we have room for almost a quarter of a million. The Royal Zoological Society of Scotland is also a joint CryoArks and European Association of Zoos and Aquaria biobank storage hub, bringing the zoo and non-zoo biobank communities together.

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‘Tahemaa Transformed’ The Conservation of the Mummy Coffin at The Bournemouth Natural Science Society.

Written by Bethany Palumbo, ACR, Founder and Owner of Palumbo Conservation Services on behalf of the Bournemouth Natural Science Society.

Tahemaa has been a resident of the Bournemouth Natural Science Society since 1922, when she was donated from the Salisbury museum (fig. 1). New research indicates that she arrived in the UK in 1823 from the ancient city of Thebes, now known as Luxor, on the river Nile. Her coffin is dated from 700 BC making her approximately 2700 years old. We know from the hieroglyphics on the side of her coffin that she was the daughter of a Hor a high priest of Montu, the Flacon-God of War. Other than this we know very little about her and her life in Egypt.

Figure 1. Tahemaa the Mummy at the Bournemouth Natural Science Society.

Tahemaa has been at the Society for nearly 100 years but she has spent most of this time locked away from public view. In 1993, the Society decided to put her on permanent display in the Egyptology exhibition. Since then she has been seen by thousands of admirers, however due to her age and fragile condition, she is in need of urgent conservation treatment. Hundreds of years in an unstable environment have caused significant damage to the coffin. The fluctuations have caused the wood, plaster layers and paint to crack and flake. The layers of the coffin have even separated in some areas, lifting away from the wooden frame (fig 2). Many years without a display case has also resulted in a thick layer of dark, engrained dirt concealing the original colours of her decorative paintwork (fig 3).

Figure 2. Layers of the coffin structure peeling away.

Figure 3. Original colours are darkened with the build-up of surface dirt.

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Wild about Portsmouth – Life in Lockdown

Written by Christine Taylor (Curator of Natural History), Bradley Foster (Natural History Collections Assistant), Portsmouth Museums.

Until lockdown, the Wild about Portsmouth project, funded by the National Lottery Heritage Fund, had been a whirlwind of activity, working with volunteers to re-house, reorganise and catalogue the natural history collections, developing school sessions, putting on and attending events as well as setting up displays.

In the four weeks prior to lockdown, the curator, volunteers and the newly appointed (14 February 2020) Natural History Collections Assistant installed an exhibition, ‘D is for Dodo, E is for Extinct’; attended a work placement fair at the University of Portsmouth, a family fun day at Dinosaur Isle, a STEM fair and the HBIC Hampshire Recorders Forum. We also created a Pop-Up Museum one-day event and ran a trial school session on rocks and fossils at Cumberland House Natural History Museum.

One of the online activities created for Cumberland House Natural History Museum website © Portsmouth Museum

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#CyclaPeople In Lockdown

Written by Claire Smith, volunteer at the University of Reading Herbarium.

I don’t imagine that there’s an abundance of field work taking place during the unprecedented pandemic situation that we find ourselves in at the moment. However, if there was one piece of advice that I could offer to anybody taking down field notes, it would be to develop neat handwriting! Either that, or to transcribe your notes into digital form as soon as possible. Otherwise, some poor soul – who may not even be a botanist – may find themselves, a mere thirty-three years after your expedition, staring at a page of unfamiliar place names or Latin plant names, with confusion.

Some field notes are more legible than others…
© Claire Smith, 2019

That said, would anybody care to take a guess at what’s been happening with the Cyclamen Society collection during lockdown? Yes, I’m taking the opportunity to get to grips with as much of the data entry as I possibly can. As with so many other collections around the world, volunteers haven’t been into the Herbarium since the middle of March. This means that our usual tasks of mounting and photographing the collected cyclamen specimens are out of bounds. Aside from the physical though, there is always plenty of digital work to do.

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