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Blogs from our Scientific Researchers

Carnegie Museum of Natural History is home to active research and vast scientific collections. Our scientific researchers regularly contribute to the blog at the museum.

November 21, 2023 by Erin Southerland

Art and the Animal

by Deirdre M. Smith

The Society of Animal Artists is an association of international artists who depict nonhuman animals and wildlife scenes in 2-D and 3-D media. Founded in 1960, today there are 500 members living in 25 countries. The Society hosts an annual exhibition called Art and the Animal, and this year’s 63rd edition kicked off at the Stifel Fine Arts Center of the Oglebay Institute in Wheeling, West Virginia. The Society sought nearby artists and scholars to serve as judges and reached out to CMNH. As an art historian whose research often intersects with animal studies (including the question of whether nonhuman animals themselves can be called artists), I jumped at the opportunity to learn more about the Society and see their latest exhibition.

The author with fellow judges Larry Barth and Julie Zickefoose at the artists’ reception for Art and the Animal. Photograph by Walter Matia.

My fellow judges were Larry Barth and Julie Zickefoose, both accomplished animal artists themselves. Larry is an award-winning carver of birds in wood, and Julie paints and writes on birds and other animals, often in watercolor. I was interested to learn that both artists have connections to CMNH. Larry volunteered in the Section of Birds in the mid-1970s, and both artists have sketched study skins from the section’s collection. One of Larry’s impressively-detailed carvings, depicting a Ruffed Grouse, is on display today at Powdermill Nature Reserve. 

A view of second floor galleries of the Stifel Fine Arts Center during Art and the Animal. Photograph by author.

The exhibition featured 116 works by as many artists. Nonhuman animal subjects was the overarching theme, but within that domain artists turned their attention to diverse species: from house cats to cheetahs, dairy cows to zebras, snakes, bears, a southern stingray, and many, many birds: avocets, falcons, herons, owls, penguins, woodcocks, a Eurasian hoopoe, the list goes on. The choices of style and medium were equally varied, from highly detailed, realistic paintings, to decorative cut paper compositions, and from humorous works to ones alluding to the precarious lives of all animals under present environmental crises.

Works from the exhibit: Left, Lisa Nugent’s Follow Me Into the Sea, a depiction of a southern stingray in soft pastels, which was selected for an Award of Excellence. Right, Elke Gröning’s Cozy Cuddling, a colored pencil image of two little red flying-fox bats. Photographs by author. 

Works from the exhibit: Left, Lisa Nugent’s Follow Me Into the Sea, a depiction of a southern stingray in soft pastels, which was selected for an Award of Excellence. Right, Elke Gröning’s Cozy Cuddling, a colored pencil image of two little red flying-fox bats. Photographs by author. 

The judges were tasked with selecting up to eight works that stood out overall for “Awards of Excellence,” as well as four cash prizes. After lunch with Renée Bemis (President), Kim Diment (Vice President), and Wes Siegrist (Executive Director), where the bias against sculptors in the “fine arts” and apple foraging in Appalachia were topics of conversation, we began what ended up being a three-and-and-half-hour-long process of tough deliberations. We were instructed by the leadership of the Society not to let our opinions about a species impact our judgment, and to initially not look at the names of the artists. Otherwise, we were free to use our own best sense as to which works stood out as superlative. As judges we found ourselves balancing assessment of the artist’s technique, choice of medium, the extent to which they had accurately and compellingly captured their animal subject, with the overall visual and conceptual appeal of the work. Some of our most intense conversations and disagreements concerned bird anatomy (something Larry and Julie are expert in), what it means and matters to be “realistic,” and whether artists were bringing fresh perspectives to the genre of animal art.

Examples of work from the Carnegie Museum of Natural History’s Natural History Art collection. Left, a screech owl painted by George Miksch Sutton, ornithologist and former CMNH staff member. Right, a field sketch of a snake by Romeo Mansueti from 1939, who eventually became a professor at the Chesapeake Biological Laboratory at the University of Maryland. Photographs by author.

I felt primed for the task of judging the competition because I had spent the summer with CMNH volunteer Elizabeth Dragus going through each object in the museum’s Natural History Art collection, which features hundreds of naturalist illustrations made by artists, scientists, and several former CMNH staff between the nineteenth and twentieth centuries. Established in the early 1970s as the M. Graham Netting Animal Portraiture Collection, it is a treasure trove of images and sculptures of birds, fish, insects, mammals, and reptiles. Several artists in the collection are members of the Society.

Rachelle Siegrist’s Nature’s Incredible Water Filter, a watercolor painting of a freshwater mussel. Image credit, the Society of Animal Artists.

One work that received much commentary from the judges, and eventually an Award of Excellence, was Rachelle Siegrist’s Nature’s Incredible Water Filter, a petite (6 x 4 in.) charmer of a watercolor painting depicting a freshwater mussel leaving a trail in sand. The only bivalve subject in the whole show, the work equally stood out for the way the artist captured the patterns on the surface of the water above the mussel. In the statement that accompanies the image in the exhibition catalog, Siegrist shares details on the lives of freshwater mussels: their ability to filter bacteria and pollutants, their role as an “indicator species,” and the rising threat of extinction that these organisms face. 

Animals of other species are the most enduring subjects of human image-making, stretching back to the oldest surviving image in a cave, the “Sulawesi pig.” Humans have made images of other animals in order to worship, marvel at, allegorize, objectify, and study them. Siegrist’s little painting demonstrates the power that this primordial practice of taking the time and effort to make an image of another animal can hold: she offers the viewer the opportunity to pause and contemplate a little being whose life might otherwise go unnoticed, or be inaccessible, and develop a new relationship to it through her act of representation. 

Deirdre M. Smith is an Assistant Curator at Carnegie Museum of Natural History.

Carnegie Museum of Natural History Blog Citation Information

Blog author: Smith, Deirdre M.
Publication date: November 21, 2023

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Filed Under: Blog Tagged With: Deirdre Smith, Science News

November 17, 2023 by Erin Southerland

Tribal Museums Day and Promoting Indigenous Authors

by Amy L. Covell-Murthy 

The Association on American Indian Affairs (AAIA) celebrated its 100th anniversary in 2022, making it the oldest non-profit serving Indigenous Nations in the United States. Founded in 1922 to promote sovereignty and self-sufficiency by halting assimilation, termination, and allotment, the AAIA continues to advocate at a national level, while supporting grassroots level implementation of Tribal programs.

As part of our ongoing repatriation work at CMNH and as a member of AAIA, I attended the annual meeting in Shawnee, Oklahoma last week. I received training in the new regulations of the Native American Graves Protection and Repatriation Act, met Tribal and Institutional representatives who share in the same work that I do, and learned more about how the AAIA is helping to educate and advocate. One thing I am excited to share is that the AAIA declared December 2-9, 2023 as the 2nd Annual Tribal Museums Days and has created an interactive map of where participating museums are located.   If you would like to visit a Tribal Museum in person, the closest to Pittsburgh is the Onöhsagwë:de’ Cultural Center in Salamanca, New York. While the museum might not be open on the weekend, you can support them through their online gift shop. 

slide above a stage that has a photo of four people and the words: Associtation on American Indian Affairs, Ink & Impact: Our Stories Make a Difference

At the meeting, I was fortunate enough to be able to attend an Indigenous author event called Ink and Impact: Our Stories Make a Difference, which featured Angeline Boulley, Kim Rogers, Andrea L. Rogers, and Sara Elisabeth Sawyer. During the Q&A an audience member asked how we could help spread the word about their amazing books and other Indigenous works. They offered quite a few suggestions, including ordering a set of books to donate to a local library or classroom. My sister happens to be a reading teacher in Franklin, PA, so as a donation to her classroom in honor of Native American Heritage Month (which is in November!) she’ll be receiving Boulley’s Firekeepers Daughter and Warrior Girl Unearthed, and Sawyer’s Anumpa Warrior: Choctaw Code Talkers of World War I, as well as a few other books by Louise Erdrich. Another suggestion was to use our social media platforms to not only elevate Indigenous authors, but to also promote Indigenous owned book sellers.

So…. I am happy to promote Green Feather Book Company of Norman, Oklahoma. They were present all week at the meeting selling the books featured at the event and other Indigenous works. They have an easy online ordering feature, and you can buy all four of these author’s book here along with many others. 

Remember, if you can’t buy a copy, it costs nothing to request to borrow them through your local library. This also benefits the authors and spreads the word. Happy Reading!

Amy L. Covell-Murthy (she/her) is Archaeology Collection Manager/Head of the Section of Anthropology.

Related Content

Celebrating Indigenous Peoples’ Day 2023

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Bringing a Little O-Gah-Pah to Pittsburgh

Carnegie Museum of Natural History Blog Citation Information

Blog author: Covell-Murthy, Amy L.
Publication date: November 17, 2023

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Filed Under: Blog Tagged With: Alcoa Foundation Hall of American Indians, Amy Covell-Murthy, anthropology, Science News

November 9, 2023 by Erin Southerland

Museum Researchers Describe Five New Amphibian and Reptile Species in 2023

Five frogs in the genus Amolops: A: Amolops cremnobatus, B: A. tanfuilianae sp. nov., C: A. sengae sp. nov., D: A. kottelati sp. nov., E: A. attiguus sp. nov.
Acontias mukwando. Photo credit: Arthur Tiutenko.

Researchers in Carnegie Museum of Natural History’s (CMNH) Section of Amphibians and Reptiles celebrate five new species described in 2023. Associate Curator Dr. Jennifer Sheridan and an international research team describe four new species of Southeast Asian frogs in the genus Amolops in the journal Vertebrate Zoology. Collection Manager Mariana Marques and international colleagues describe a new species of legless skink (small lizard) from Angola in the African Journal of Herpetology. Both museum researchers are lead authors of their respective studies. 
 
Marques and Sheridan’s discoveries took place 6,000 miles apart on different continents, yet both provide new scientific insights about their respective regions. In the face of a worldwide decline in biodiversity due to human impact, the documentation of new-to-science species fills vital knowledge gaps for a better understanding of ecosystem health. The better scientists can document biodiversity, the better they understand the effects of biodiversity loss and how to identify future conservation goals. 
 
“Publishing five new species within less than three weeks is exciting for us and the museum,” said Sheridan. “Both discoveries required a combination of field work and research back at the museum. Mariana knew in the field that she had likely encountered an undescribed species, while in my case, these frogs were labeled as Amolops cremnobatus in the field because that’s what they looked like. Years later, once we started looking closely at numerous individuals collected by many researchers, we began to fully realize the diversity hidden in the Amolops genus.”

Dr. Jennifer Sheridan, Associate Curator of Amphibians and Reptiles.

Sheridan and researchers from Laos and North Carolina hypothesized that the Lao torrent frog Amolops cremnobatus, first described in 1998, is actually five species in the genus Amolops based on mitochondrial DNA analysis of specimens from Laos, Vietnam, and Thailand. Their paper in Vertebrate Zoology describes the four new species Amolops tanfuilianae, Amolops kottelati, Amolops sengae, and Amolops attiguus. 

“These are extremely cryptic species,” said Sheridan. “So, determining the differences is not as simple as ‘specimen A has different coloration than cremnobatus’ or anything like that.” The visual differences between adult specimens were small and included varied finger lengths and the number of vomerine teeth (used to capture and hold prey). Tadpole morphology (size, shape, and structure) was key; even though adults are collected more often than tadpoles for scientific study, tadpole information is important. Body length, presence or absence of glands, and other physical features in tadpoles provided crucial data to differentiate the new Amolops species. Molecular data including mtDNA and nuDNA analysis also revealed differences the research team needed to describe the four new species. The team recognizes that continued research in Thailand may reveal additional species. 

Meanwhile, Marques and an international team of researchers discovered the skink Acontias mukwando on Serra da Neve, an inselberg, or isolated, rocky outcrop, in Angola, one of the most ecologically diverse countries in Africa. Moveable eyelids and distinct coloration distinguish the new species, Acontias mukwando, from other species in the genus Acontias. The research team chose the species name in honor of the local Mukwando tribe to recognize their support and friendship during field work.

Both Sheridan and Marques used specimens from the collections of multiple other museums to fully determine how these newly described species are unique, and how they relate to their closest relatives. They relied on collections made by numerous researchers from multiple countries, highlighting the value of collaborative museum networks for understanding global biodiversity.

“Finding a specimen like Acontias is always exciting,” said Marques. “These animals spend most of their time under rocks and foliage, and they are not usually seen by people. There is so much we don’t know about them. Discovering that a member of a little-known group occurs on top of an equally obscure mountain was such an exciting mystery to solve. It was one of those rare ‘wow’ moments in your career as a scientist! My goal is to provide a solid and scientific overview of the fauna occurring in Serra da Neve, in order to support its conservation and contribute to the understanding of its rare biodiversity.”

CMNH’s Section of Amphibians and Reptiles maintains a collection of more than 230,000 specimens and ranks as the ninth largest amphibian and reptile collection in the United States. It includes 156 holotypes, the single type specimens upon which the descriptions and names of their respective species are based. 

Filed Under: Press Release Tagged With: amphibians and reptiles, herpetology, Jennifer Sheridan, Mariana Marques, Science News

September 22, 2023 by Erin Southerland

2023 Point Counts at Powdermill Avian Research Center

by Grace Muench

Since 2013, field technicians at Powdermill Avian Research Center have gathered data about breeding birds on the 2200-acre Powdermill Nature Reserve through point counts. This wildlife survey term denotes tallies of every bird detected by sight and sound by a single observer located at fixed, predetermined positions for specified time periods, along with rough estimates of each bird’s distance from the surveyor. On many days this summer I was the surveyor, and the experience was enriching. 

Powdermill is divided into ten sectors containing eight to eleven points, and during June and early July, I visited a different sector each day to conduct ten-minute point counts. I surveyed each sector twice, for a total of 190 different counts. Point counts can tell us about densities of birds in the immediate area, trends in the regional populations, species proclivity for a certain habitat, and more. Because Powdermill’s point count locations overlay plots from a vegetation survey that was completed at Powdermill in the mid-2000s, the paired data give us valuable information about the forest ecology on the reserve.

Pileated Woodpecker
Credit: Powdermill Nature Reserve, Carnegie Museum of Natural History

On the first day of point counts, the Porcupine Ridge trail acted as the main access corridor for many of the points in the sector. While walking along the trail to the last point of the day, I heard an unfamiliar noise. It sounded like several incessant hollow bark-like calls, and in the far distance I could hear Pileated Woodpeckers. Knowing that these woodpeckers primarily nest in dead trees, I began to search for nestlings. At the very top of an old, dead chestnut oak tree with almost no bark, I saw three heads poke out of a cavity, calling to the parents who were now close by and began acting defensively. While I had heard Pileated Woodpeckers in almost every sector this summer, this was the only nest that I observed, and it was the first of many incredible sightings. 

Shortly after completing surveys at every point in all ten sectors, I restarted from the beginning. The particular sector I surveyed on June 11 has about a one-mile-long hike uphill to get to the first point. Three quarters of a mile in, I saw some movement to my right and redirected my attention. A yearling black bear was running up and down a fallen tree, stopping only briefly to scratch himself. I could tell the bear was a yearling by the shape of the head, along with the long and slender legs making the bear look tall. The bear ran across the fallen tree two or three times before he noticed my presence. He very slowly turned himself to look in my direction, paused for a few seconds at most, and took off into the forest. 

Pennsylvania is also home to the Timber Rattlesnake, which brings me to my next animal encounter. I was walking through a mountainous, hilly second growth forest. The understory was filled with green briar and stinging nettles, so I had my eyes on the ground to minimize the chances of being stuck or stung by these plants. The walk from one point to the next was about 250 meters, or 0.16 miles. There are often obstacles like fallen trees, some of which are easy to step over, but others I had to go around. As I approached a fallen tree, I heard an unfamiliar noise. Though unfamiliar, the rattling sound was unmistakable. A few meters down the fallen tree was a large, perfectly coiled dark phase Timber Rattlesnake. I estimated this snake was four to five feet long, and it was clear that there was a meal moving through the snake’s digestive tract. The snake had eight rattles, specialized hollow scales which are added, one layer at a time, each time the reptile sheds its skin. I was lucky to be able to observe the snake from a safe distance for a few minutes before I headed to the next point. 

timber rattlesnake
Credit: Grace Muench

The last day of point counts was also one to remember. About halfway through the final point of the sector, something about 250 meters away made a noise that I can only describe as a woman screaming. Immediately, all birds stopped singing and flew up into the canopy. I knew this animal call. It was a bobcat! This scream is referred to as “caterwauling,” and the sound is produced primarily during the mating season. After hiking back down to the avian research center, I was lucky enough to spot a different bobcat! A relatively small bobcat was hiding next to a structure near the bird banding lab, stalking the eastern cottontails that were foraging in the grasses. After a few minutes of inching closer and closer to the rabbits, the bobcat pounced. The rabbits frantically ran in all different directions, and the bobcat was left empty-handed. 

bobcat laying in the grass
Credit: Grace Muench

After completing the 190 point counts, I rejoined the banding crew to finish the breeding season and to prepare for fall migration. I will always remember encountering and observing incredible wildlife, seeing my lifer Cerulean Warbler, and all that the Powdermill staff has taught me this summer. I can’t wait to learn more this fall!

Grace Muench is a Field Tech at Powdermill Avian Research Center.

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Filed Under: Blog Tagged With: Grace Muench, Powdermill Nature Reserve, Science News

September 6, 2023 by Erin Southerland

Do No Harm: Dealing with Spotted Lanternflies

by Jonathan Rice

Spotted lanternflies are a “true bug,” cousins of the cicada and stink bug. Unlike our native bug species, these invasive bugs feed on a very wide variety of plants and don’t have enough native predators or parasites to keep their population in check. Their favorite food is tree-of-heaven (Ailanthus altissima), which is already widespread in our area. This means their population is exploding, and Pittsburghers are looking for ways to get rid of them. 

adult spotted lanternfly

There’s no special pesticide that targets the lanternflies. However, we can outsmart them. 

Spotted lanternflies display a unique behavior of climbing up tree trunks (or any other vertical surface), falling to the ground, and climbing up again. This is repeated many times throughout each stage of their life cycle.  By using this behavior to our advantage, we can trap spotted lanternflies. The best currently used traps include circle traps and oviposition traps, which corral the lanternflies so they can be contained and destroyed. You can make circle traps as a DIY project, or you can order them premade. 

Sticky traps: to stick or not to stick?

Although sticky traps (tape, sticky sheets, and glue traps) have been suggested in the past for spotted lanternfly control and are currently used by some landowners, these are extremely dangerous for birds. Sticky traps can kill many species of local birds that forage on tree trunks, including woodpeckers, nuthatches, and wrens. After the birds are stuck to the trap it becomes impossible for them to free themselves and they will die a slow and miserable death.

Woodpecker being treated for injuries from a sticky trap. Credit: Raven Ridge Wildlife Center.

If you find a live bird or mammal stuck to a lanternfly sticky trap, do not try to remove the bird yourself. Cover any remaining sticky areas on the trap with plastic wrap to reduce double sticking the bird (or yourself), remove the entire trap from the tree, and take it to the nearest wildlife rehabilitation center. If you must use a sticky trap, ensure it is covered with a wire mesh (hardware cloth or similar) to prevent anything larger than a lanternfly from touching it. Check sticky traps at least once a day to ensure no birds or mammals have been caught. 

Jonathan Rice is Urban Bird Conservation Coordinator at Powdermill Nature Reserve, Carnegie Museum of Natural History’s environmental research center.

Related Stories

Tracking Migratory Flight in the Northeast

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Carnegie Museum of Natural History Blog Citation Information

Blog author: Rice, Jonathan
Publication date: September 6, 2023

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Filed Under: Blog Tagged With: Anthropocene, Birds, Invertebrate Zoology, Jon Rice, liocf, Powdermill Nature Reserve, Science News

August 31, 2023 by Erin Southerland

The Nose that “Sees”

by Lisa Miriello

Despite the common name of the star-nosed mole (Condylura cristata), the 22 fleshy appendages at the end of its snout act more like an eye than a nose. These unique tentacles, or rays, are covered with more than 25,000 Eimer’s organs that hold over 100,000 nerve fibers (more than five times the number in the human hand) and are the most sensitive touch organs of any known mammal.

Given the mole’s poorly developed eyesight, the rays are far more useful for finding prey.

They are constantly moving and touching to identify what’s good to eat and what isn’t. Sensitive whiskers on the head and front feet also act as “feelers,” whether looking for food or navigating their way through dark underground tunnels.

close-up of the nose of a star-nosed mole
“mole-star-nosed-4” by Brandon Motz is licensed under CC BY 2.0

Found throughout much of eastern North America in low elevation areas with moist soils, star-nosed moles are one of three mole species found in Pennsylvania. Their preferred habitat consists of wetlands near streams, lakes, and swamps. The soft moist soil makes it easier to construct tunnels and underground chambers, and the mole’s short neck, powerful shoulders, and heavy claws make them efficient diggers. Shallow tunnels, often temporary, are used for traveling and foraging, while deeper, more permanent tunnels are used for resting, nesting, and escaping cold weather. Condylura is relatively safe from predators while underground but vulnerable to birds of prey, weasels, skunks, foxes, and snakes when out of their tunnels. 

The star-nosed mole is a voracious eater that consumes 50% or more of its body weight each day. More notably, it holds a Guinness World Record for the fastest eating mammal. 

Scientific studies have shown that Condylura can identify and eat prey in less than one-fifth of a second (200 milliseconds). That’s as many as five prey items per second, too fast for the human eye to follow.

Besides the worms, grubs, beetles, and other invertebrates found underground or on the surface, being near water gives them access to another hunting ground where they can find mollusks, aquatic insects, amphibians, and even small fish.

“star-nosed-mole-3” by gordonramsaysubmissions is licensed under CC BY 2.0.

Most moles can swim, but the star-nosed mole is the most aquatic of North American moles. 

Their dense waterproof coat and large paddle-like limbs make them well suited for swimming and diving. They’ve evolved to have twice the lung capacity of other moles, and their long tail, almost one-third the length of its body, acts as a rudder. More time is spent foraging in the water than on land, and they’ve been seen swimming under the ice in winter. This remarkable mole can even smell under water by blowing bubbles, then inhaling the same bubbles to capture the scent molecules inside. 

Not a great deal is known about the reproductive cycle of star-nosed moles. They’re more social than other moles, living in small colonies, and it’s believed that mating pairs stay together through the winter. Breeding season starts in early spring and the female produces only one litter a year, unless the first litter is unsuccessful. After a 45-day gestation period, two to seven pups are born in May and June. The newborns are blind and hairless with their tentacles folded against their snout. About two weeks later the eyes open and the tentacles unfurl and begin to function. The young develop rapidly and leave the nest after about four weeks, reaching full maturity at 10 months. The exact lifespan of this species is unknown but estimated to be 3-4 years in the wild.

“Baby star-nosed moles” by Hillbraith is Public Domain.

The extraordinary star-nosed mole stands out from other moles in many ways, and is certainly among the most unusual mammals in Pennsylvania. They’re not rare, but they’re not commonly seen even though they spend more time above ground than other moles. They’re active day and night, all year round, so keep your eyes peeled when you’re around water and if you’re lucky you might catch a glimpse of one.

Lisa Miriello is the Scientific Preparator for the Section of Mammals.

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Carnegie Museum of Natural History Blog Citation Information

Blog author: Miriello, Lisa
Publication date: August 31, 2023

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Filed Under: Blog Tagged With: Hall of North American Wildlife, liocf, Lisa Miriello, mammals, Science News

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