Natural History

Hi! I’m Sophie, a Biological Science student at Cardiff University. Currently, I’m undertaking a Profession Training Year within the Mollusca section in the Natural Sciences Department at Amgueddfa Cymru under the supervision of curator Anna Holmes. My passion for zoology has inspired me to pursue opportunities that deepen my understanding of the animal kingdom. I love learning about different species and their unique roles within ecosystems. While Malacology is a new field for me, I am eager to explore the world of molluscs and broaden my zoological knowledge.  

During my placement year I will be working with Anna to research a non-native species of bivalve, Potamocorbula amurensis known commonly as the Amur River clam. Specimens recently collected from the Outer Thames Estuary have come to us for identification confirmation and, if correct, it will mark the first record of P. amurensis in the UK. Native to China, Japan and Korea, Potamocorbula amurensis has been previously recorded in San Francisco Bay, where it spread rapidly, and more recently in Belgium. One of the most common ways bivalves are introduced to new environments is through ballast water from ships. Ships take in water in one area, along with small organisms, and then release it in another, leading to the introduction of non-native species. 

Over the past two months at Amgueddfa Cymru, I have been engaged in a variety of tasks that have allowed me to gain valuable experience and knowledge in malacology. In preparation for our report, I have been researching previous studies on Potamocorbula amurensis, particularly focusing on its invasions in San Francisco and Belgium. I have been using a light microscope and Helicon Focus software to photograph bivalves from the museum’s collections, some of which are over 100 years old. Specifically, I have been imaging the specimens of possible Potamocorbula amurensis from the Thames, as well as specimens of that species and similar species that were already in the museum’s collection, taken from their native habitat of Asia. I am comparing them with the Thames specimens to provide a positive identification. 

Additionally, I have been imaging other species from the same family, Corbulidae, also known as the basket clams, to examine the differences between similar species. In the UK, the only native species of Corbulidae is Varicorbula gibba, and it’s usually found burrowed in coastal mudflats or estuaries, hiding just below the surface. These shells are very small and must be imaged carefully, from several angles, ensuring the lighting emphasises the specific features that aid in identification. The right valve is notably larger than the left, earning it the nickname “overbite clam”. Each valve features a tooth, an important characteristic for identifying bivalves. 

Recently, ethanol preserved samples of Potamocorbula amurensis have been collected from the Thames. In the next few weeks, I will be analysing the DNA of these specimens, with the hope of discovering if the UK population came from the San Francisco introduction or the native population in China.   

 Understanding the presence and spread of non-native species like Potamocorbula amurensis can have significant ecological and economic implications. Invasive species often disrupt local ecosystems, outcompeting native species, altering habitats, and affecting biodiversity. Some non-native species (around 10-15% of them) can become invasive and by identifying the pathways of introduction and tracking the spread of Potamocorbula amurensis, we can better inform conservation strategies and management practices to mitigate its impact on local environments. 

In addition to my research project, I’ve also been given the opportunity to gain hands-on experience in curating shell collections.  I have been sorting through the CCW – Lloyd James shell collection, cataloguing it into the museum’s Mollusca database. This process involves carefully organising and documenting the specimens, ensuring accurate records for future reference and research. Working with this collection has given me the chance to appreciate the incredible diversity of British molluscs and observe firsthand how intricate and beautiful their shells can be. One standout for me has been Palliolum striatum a stunning scallop species with vibrant colouring and beautifully ridged patterns. 

My time at Amgueddfa Cymru so far has been nothing short of wonderful. The staff in both Mollusca and Natural Sciences as a whole have been incredibly welcoming and supportive. They have generously shared their expertise with me, not only expanding my knowledge, but also deepening my appreciation for all the great work the museum does. I’m truly grateful for this opportunity and excited for what the rest of my placement will bring. I look forward to continuing my work here and learning even more from the incredible team. 

Written by Lindsey Sartin, MA Conservation Practice student, Durham University on Placement at National Museum Cardiff.

The Dodo bird was first documented in 1598 on the island of Mauritius in the East Indies, but unfortunately, it became extinct by 1700—before modern taxidermy processes were discovered and used for the preservation of animal specimens. However, some replica taxidermy models exist. One of these is at Amgueddfa Cymru –Museum Wales. The museum purchased it in 1915 from Rowland Ward Ltd. for 15 GBP (roughly the equivalent of 1288 GBP today). 

The Amgueddfa Dodo—named Dudley by the conservation team—contains information about the discovery, distinction, and documentation of the extinct Raphus cucullatus species, centuries of speculation and research about what the species looked like, the development and cultural fascination with taxidermy, and artistic model-making processes.

Before conservation, little was known about Dudley and how it was made. X-radiographs revealed the internal structure of the model, and Fourier Transform Infrared Spectrometry (FTIR) was used to understand the composition of Dudley's feet, face, and dressing (the external parts of taxidermy specimens, including the feathers and skin). X-ray fluorescence (XRF) and scanning electron microscopy with elemental analysis indicated arsenic had been used as a preservative for the skin to prevent pests from consuming it, so extra safety precautions had to be taken when handling Dudley. 

The analysis results were then compared with Rowland Ward's methods of mounting specimens, described in a book written by Rowland Ward in 1880. Letters between William Hoyle, the Museum Director at the time, and Rowland Ward Ltd also revealed that Dudley had a tail when he first arrived at the museum, but it had since been lost. An image of Dudley dated to circa 1938 also showed it had a tail in the past. 

All the investigations showed that iron rods make up the skeletal frame in the legs, extend through a wood base made of two boards held together with glue and dowels and are attached to a thin board cut to the shape of Dudley's body. The neck is probably circular and made from a separate board from the body. Dudley's head and feet are plaster, and tempera and oil paints were used to add colour to both parts. A piece of canvas connects the head to the body. The body is stuffed with wool, and the dressing includes real, natural bird skin and feathers (down, contour, and flight feathers). Polyvinyl acetate (PVA) between some toenails indicates that Dudley was conserved sometime after 1930. When the model first arrived at the museum, it should have had a tail with feathers that curved away from the head.

Condition Before Conservation

Being over 100 years old, Dudley's skin had become dry and brittle, and many feathers had fallen out particularly around the head, neck and legs. The plaster in the feet was crumbling. A claw was missing from one of the talons, feathers were missing from one of the wings, and the tail was missing. There was also a layer of dust on the entire model. 

Conservation Treatment

First, dust was removed from Dudley with a soft, sable brush towards a low suction museum vacuum. The vacuum nozzle was covered with a fine mesh to ensure no feathers or skin were collected into the vacuum. 

Then, the plaster on his feet was consolidated with a polyvinyl butyral resin (Buvtar 98) in ethanol. A replacement claw was made with Thibra thermoplastic painted black and adhered with an ethyl methacrylate and methyl acrylate copolymer resin (Paraloid B72). 

Feathers that had fallen off Dudley in the past were stuck back on with Paraloid B72. 

New feathers had to be purchased to replace the ones missing from the wing and tail, but the new feathers were bright white and did not match the appearance of the rest. So, acrylic paints were diluted with isopropyl alcohol and airbrushed onto the new feathers. Once dry, the tail feather was curled to the proper shape with steam. All the new feathers were then placed in their proper positions with entomology pins. 

With an improved appearance and stability, Dudley is now ready to meet the public! Dudley's visit to the conservation lab also allowed the conservation team to learn more about how the model was constructed, which will allow the museum to better preserve it for current and future generations to enjoy. 

Written by Madalyne Epperson, MA Conservation Practice student, Durham University – on placement at National Museum Cardiff.

Natural history collections are often central to our understanding of evolution, population genetics, biodiversity, and the environmental impacts of pesticide use and climate change, among other things. For this reason, caring for these collections is of great importance. A taxidermy tree pangolin – named Paddy by the conservation team - was brought to Amgueddfa Cymru – Museum Wales in 2017 in need of attention. Paddy was collected on August 4th, 1957, by researchers during Cambridge University’s French West Africa Expedition. According to the expedition diary, Amgueddfa Cymru had asked the researchers to retrieve a pangolin to make a museum specimen, as was common practice at that time. The mounted pangolin was feared lost after the expedition’s drying tent went up in flames on August 25th, 1957. Paddy was terribly singed by the fire, which greatly disheartened the expedition team. It is perhaps for this reason that Paddy never made it to the museum when the expedition concluded. It was not until 2016/2017 that Paddy was found in Staffordshire in the home of one of the expeditions members and sent over to the museum.

Condition Prior to Conservation

Analysis was conducted to learn more about Paddy’s preparation, and his condition was assessed before interventive conservation treatments were undertaken. X-radiography revealed an iron wire extending the length of the specimen, while scanning electron microscopy with elemental analysis (SEM-EDX) confirmed no arsenic, mercury, or other pesticides are present. After being left on top of a wardrobe for 60 years, Paddy was covered in dust, cobwebs, and other contaminants. He was also coated in smoke residues from the fire that melted the keratin scales on his face, torso, and tail. Larvae casings found on and within the specimen suggest there was a carpet beetle (AKA wooly bear) infestation as one point, although no signs of an active pest problem were found. Arguably the most imperative concern was the split in Paddy’s chest, which was liable to grow if not addressed properly. 

Conservation Treatment

A conservation vacuum and soft bristle brush were used to remove loose debris, including fuzz, insect casings, and dust, from Paddy’s surface. Cosmetic sponges were proposed and tested as a means of removing engrained dirt from the specimen’s scales, but they were not as effective as expected due to the coarse nature of the scales. A dilute solution of Synperonic N non-ionic detergent in 50:50 water and ethanol on dampened cotton swabs proved very successful at removing the stubborn contaminants. Once Paddy was cleaned, ethanol on cotton swabs was utilized to clear any remaining surfactant residues.

After Paddy was clean, attention turned to the split in Paddy’s chest. Bridges were made from Japanese Tissue paper and secured using Evacon R, a neutral pH, non-plasticized ethylene-vinyl acetate (EVA) copolymer emulsion. Tweezers and dental tools were used to manipulate the adhesive-soaked strips of Japanese Tissue paper into the split until the entire gap was sufficiently filled. Once the adhesive was dried, Winsor and Newton acrylic paints were used to tint the Japanese Tissue. The so-called “six-foot, six-inch” rule was followed during the color-matching process. This will allow the gap to be identified upon close inspection but ensures it does not detract from the specimen while on display.

The decision was made to remove the section of iron wire protruding from Paddy’s nose. Although the wire is part of the preparation history of the specimen, there was concern that the wire may snag and cause damage in the future. A small hack saw and wire cutters were utilized to quickly remove the wire. Care was taken to cut off as much of the wire as possible without affecting the organic material surrounding it. The cut wire was very bright and shiny, so the end was obscured using Winsor and Newton acrylic paints.

Paddy is now ready to meet his adoring public! Pangolins, generally, are considered the most trafficked animal in the world. Their defence mechanism (i.e., curling into a ball) makes them easy for poachers to collect and transport. They are primarily harvested for their scales, which are highly valued in traditional Chinese medicine. Now that Paddy is presentable once again, he can be used to help educate and raise awareness for these wonderfully odd and endangered creatures. 

References: 

Pan Golin. 2018. GabonExpeditionPart1. [online video] Available on Youtube  

You can find out more about the vertebrates collections at the museum here. If you'd like to find out more about the stories behind some of the Natural Sciences collections and the work we do, why not check out our articles pages.

Everyone has that favorite Christmas from their childhood, I bet you can picture yours now. Mine was when I was about eight years old. I woke up to find a small rectangular present underneath my pillow, not then realizing the butterfly effect this present would have on my life. Most kids that age would be wishing for Lego or superhero figures, and I did love Lego at that age, yet this present was none other than BBC’s Walking with Dinosaurs series. I was hooked like a bee is to pollen, getting more and more lost in the land before time, the animals of today paling in comparison to the monsters that used to stalk our planet, wondering if one day I’d be able to discover and name my own.

Unfortunately, this dream was put on hold as I dealt with my terrible teenage years.  Impressing my peers became the centre of my life and being the dinosaur/science kid was not going to cut it. Once I had left school for college and grown up, considerably, I went back to my original passion, studying Biology at A level and then moving to a biology undergraduate degree at Cardiff University. 

Though I have studied biology for many years, I still had no actual experience in doing real scientific work. So, when the opportunity to partake in a professional training year (PTY) arose, I reached out with both arms. I applied for a placement at Amgueddfa Cymru-Museum Wales in Cardiff, and after a few weeks I embarked on a project with the Natural Sciences staff in the museum. This is where my journey into the scientific world begins, working on animals that perished over 450 million years ago.

The day I started my project in the museum felt a bit like a first swimming lesson, nervous but excited at the same time. Luckily for me I was put under the tutelage of the wonderful Lucy McCobb, a paleontology curator who had a vast knowledge and understanding of the time and fossils I would be working on. My first few weeks of the project were spent organizing nearly a thousand fossils by species, so that they could be transferred into drawers for easier access. The collection of fossils I had been assigned to work on was called the Sholeshook Limestone collection. These fossils were collected in South-west Wales by an amateur collector called Patrick McDermott, who graciously donated them to the museum so they could be further studied. 

My project over the year would be to curate the collection, organizing and documenting it, as well as to help identify a possible new species. The animals I would be focusing on from this collection are a group of archaic, marine arthropods known as trilobites. These creatures are some of the earliest known fossils, first appearing around 520 million years ago in the Cambrian period and lasting almost 300 million years, before going extinct with 90% of all other life in the end Permian mass extinction. 

But why trilobites? Most people overlook the arthropods of today in favour of more impressive animals. Trilobites, however, have proved vitally important to scientists in the study of evolution. Firstly, trilobite fossils are one of, if not the most, abundant fossils of their age. This is due to trilobites being amazingly successful as a class, having a hardened exoskeleton which they moulted off regularly and many species living in shallow coastal environments, both features that increase chances of fossilization massively. In fact, they have been so useful that entire evolutionary studies have been conducted on them, such as Peter Sheldon's important study of over 15000 trilobites from mid Wales in the 1980s, which resulted in an eye-opening paper shedding light on evolutionary trends based on trilobites. Excited by my prior reading, and especially the prospect of helping discover a novel species, I was eager to begin my project. 

Once all the fossils were sorted, my first task was to select the best specimens from each species to photograph. Photographing the specimens is very important as this will eventually allow them to be uploaded online and in turn, become accessible to many more people, including scientists and the public alike. 

Once this was all completed, it was time for my favourite part of my project so far, helping discover a new species! This has always been a lifelong dream of mine, although when younger I did hope I’d discover the biggest dinosaur ever, and I couldn’t wait to get started. I gathered all the fossils of the suspected new species; each specimen, over 250 in total, needed to be worked on in a number of ways. First, they had to be sorted according to which part of the body it represented.  Luckily trilobite exoskeletons tend to break into consistent parts (head, thoracic segments, tail) so this part was not too difficult. Second came the most time-consuming part, examining their features in detail under the microscope, making observations and taking multiple measurements of each specimen - like the initial sorting, this process took a few weeks but was vital, as these measurements are used to distinguish our species from others in the genus.

Once all the raw data were collected, along with Lucy, we compared our species with every other known species in the genus. This was not as easy as it first seemed.  The well-known species were rather quick to distinguish based on their different features, however, some species are not even given full species names, as only one poorly preserved fossil has been found. Comparing these fragmentary fossils to our species was taxing, especially when the papers some of these species were figured in are from the 1800’s or written in Russian! 

I am hopeful that this paper will be finished and submitted to a scientific journal before I begin my third year of my university degree. I believe this will be a huge help to make me more desirable to future employers. As well as curating and writing this paper, the museum has also given me other opportunities to help develop my scientific skills. This September, in fact, I will be presenting a poster on the project at the Paleontological Association annual conference, which I am beyond excited to do. 

Another area the museum has helped me develop is science communication. I was given the opportunity to produce trilobite spotter sheets to help the Welsh public in their fossil hunting. This involved me finding local and well-preserved fossils in the museum’s collections to photograph, laying these images out on the sheets, and working with Lucy to draft text about them. I was then able to present these sheets at a public outreach event, After Dark: Science on Show, where Lucy and I ran a stand, promoting the museum’s spotter sheets and inviting people to play a board game, which showed them how difficult it is for fossils to form. 

Having the opportunity to work in the museum has further solidified my passion for natural science, as well as giving me the tools to progress in the field post degree. I feel I have finally taken my first steps into the scientific world, rather than simply learning about other peoples’ discoveries. Being able to say that I have published scientific work before even graduating from university and knowing I can work with fellow peers in my workplace who have said they have appreciated me being here (they could be lying), has given me great self-confidence. I cannot stress how important doing a year in industry has been for me and would recommend it to any other student. The insight and experience it will give you will in my opinion completely influence your future decision making. I implore any student with the opportunity to take a training year to ask yourself, do you actually know what it will be like or have any experience working in your field? If the answer is no, then a training year should be a MUST!

Finally, I would like to thank Lucy, Caroline and Jana, as well as all the staff in Natural Sciences that have helped me this year. I feel prepared to take my next steps into science and that’s all because of the help everyone has given me.