Articles tagged with Mammals
A new Cornell University study examines the relationship between cranial shape and body weight in dogs, identifying a link to syringomyelia, a painful spinal condition. Breeds prone to syringomyelia exhibit distinct skull shapes, highlighting the need for breed-specific treatment strategies.
A unique plant fossil cache in New Mexico reveals angiosperms flourished 10 million years before dinosaurs' demise, contradicting the view that they only took over after their extinction. The discovery showcases a thriving forest dominated by flowering plants with large fruits, challenging the traditional narrative.
Research reveals that leaving deadwood in forests and creating artificial gaps can increase the diversity of bats and birds, with some species responding strongly to these changes. The study found that forest interventions can promote biodiversity even in previously monotonous ecosystems.
A comprehensive study reveals the Bornean ferret badger is found only in Sabah's western highlands, with a previously unknown population discovered in Nuluhon-Trusmadi Forest Reserve. The species' range and distribution are largely confined to mountain landscapes, highlighting the need for conservation efforts to protect its habitat.
A genomic study reveals koalas experienced a severe population decline around 100,000 years ago due to climate change and habitat loss. This finding overturns earlier studies that suggest human arrival led to the decline.
Researchers found that pregnant Pacific pocket mice trained to fear snakes produce more vigilant offspring, which survive better in the wild. This method of antipredator training may improve conservation breeding and reintroduction programs.
In a study on Japanese macaques, researchers found that semi-shade is an important thermoregulatory option under hot, dry conditions. The macaques preferred semi-shade over full shade or sun when it was hot and dry, but not humid. This suggests that semi-shade may play a significant role in helping endotherms cope with heat stress.
A nearly 2.5-meter-long woolly mammoth tusk was discovered in Taimering, Bavaria, Germany, along with over 70 additional bones and bone fragments. The tusk shows clear evidence of human cutting marks, suggesting that the animal was butchered by Palaeolithic hunters and gatherers.
A case study of captive belugas reveals evidence of mirror self-recognition, suggesting this behavior may be innate in the species. The findings support the idea that some cetaceans possess cognitive abilities similar to those of humans and other animals.
A global meta-analysis of animal behavior found that urban populations exhibit heightened boldness, aggression, exploration, and activity compared to rural counterparts. The findings highlight the need for urban planners to consider animal behavior in urban development.
Researchers studied how hibernation affects the visual brain of squirrels, finding that certain neurons undergo quick structural changes during deep sleep and arousal stages. These changes reverse within hours after waking and have no lasting effects on neuron structure six months after hibernation.
A new study published in the Journal of Anthropological Archaeology provides physical evidence of Peruvian hairless dogs from the Wari Empire site of Castillo de Huarmey. The site, located on the Pacific coast of northern Peru, yielded dog skeletal remains that were analyzed using standard zooarchaeological methods and isotopic analysis.
Researchers found that camels have a more flexible and coordinated response to heat stress, allowing them to maintain stability even at higher temperatures. In contrast, human cells tend to respond in a more rigid way, making them less adaptable under heat stress.
Researchers discovered that strokes cause a chain reaction within the brain, leading to neuronal cell death. They found that blocking collagen production can prevent this damage and even restore motor function in paralyzed monkeys. The new drug KDS12025 reduces hydrogen peroxide levels and prevents the entire process from being triggered.
A new species of hamster-sized mammal, Cimolodon desosai, has been discovered in the Upper Cretaceous El Gallo Formation of Baja California. The fossil, estimated to be 75 million years old, was found alongside dinosaur fossils and provides insights into the survival strategies of early mammals.
Researchers use tree rings and satellites to date changes beavers make to the tundra landscape as they spread northwards. The study provides evidence of beaver colonization in the region starting in 2008, with satellite analysis revealing a significant expansion of surface water between 2015 and 2019.
A new fossil discovery in Spain has effectively doubled the evolutionary history of the weasel family, dating back to around 6.5 million years ago. The fossil, named Galanthis baskini, was found in Teruel, Spain, and is estimated to be around 5 ounces in size.
A study reveals improved quality of mammal species descriptions from temperate regions, with authors from wealthy countries using more advanced techniques. The study, supported by FAPESP, analyzed 1,116 new species descriptions between 1990 and 2025.
A long-term public study found that phytochemicals from oregano and rosemary supported favorable gut health and growth performance in weaned pigs, preserving microbial diversity to improve nutrient utilization. The natural agents outperformed antibiotic growth promoters in terms of final body weight and gain-to-feed ratio.
Parties to the Convention on Migratory Species agree to list 40 additional species on Appendices I and II, including iconic species like cheetahs, hyenas, and great hammerhead sharks. The agreement also includes multi-species conservation plans for key regions like the Amazon.
The Global Initiative on the Taking of Migratory Species (GTI) aims to tackle the root causes of illegal and unsustainable taking, safeguarding wildlife and livelihoods. The initiative focuses on improving data, strengthening laws, engaging communities, and raising awareness.
New research suggests that climate change causes dormice to gain weight before hibernation but lose weight after, potentially as a result of smaller bodies losing heat faster. The study also found that habitats with higher density hedgerows were associated with heavier dormice.
Nations are coming together at the Convention on the Conservation of Migratory Species of Wild Animals (CMS) to address declining population trends and extinction threats among migratory species. The meeting aims to establish conservation policies and protections for over 2,000 species under threat.
A study published in PLOS One found that humans can recognize and mimic emotional expressions of non-human primates, indicating a strong empathetic response. The researchers assessed facial expressions and emotional states of participants, revealing a strong connection between humans and non-human primates
A new study reveals that hedgehogs can hear high-frequency ultrasound, up to 85 kHz, which could be used to design sound repellents for cars to deter them from roads. The findings suggest a potential solution to reduce hedgehog deaths, which are a major cause of road traffic accidents.
Researchers observed finless porpoises in Ise Bay, Japan, interacting with adults beyond their mothers, challenging the long-held assumption of their solitary nature. Infants approach and swim alongside adults who are not their mothers, suggesting a potential weaker mother-calf bond compared to other species.
The interim update to the State of the World's Migratory Species report warns that 49% of migratory species populations are declining, with 24% facing extinction, due to habitat loss and overexploitation. The report highlights the need for coordinated international action to address these threats and protect migratory species.
Scientists captured rare view of beaked whales by listening to their natural sounds, revealing deep-diving behavior. The study provides the first detailed description of Gervais' beaked whale dives anywhere in the world.
A research team used drones to study feral horse units in Portugal, finding that they dynamically adjust their shape and distance to avoid conflict with neighboring groups. Exceptionally, a 'friendly pair' showed high social tolerance, consistently approaching and mixing members.
Dr. Noritaka Ichinohe challenges the long-held assumption that averaging away individual differences is necessary in psychiatric research. Instead, biological heterogeneity is seen as a phenomenon demanding explanation. The author's work on primate brain mapping and molecular subtyping has identified convergence points between species ...
Researchers found thousands of hutia fossils in a Caribbean cave, including nests made from compacted soil and coated with a waxy substance. The discovery provides evidence of the presence of bees in the area thousands of years ago, challenging initial findings on wasp nests.
A study on experimental microneedle painkiller patches in pigs has shown that the drug concentrations reached only about 2 micrograms per liter, which is 1,500 times less than the required effective dose. The patches work better on the neck than the ear and have shown safety and tolerability.
A recent study published by the University of Cambridge ranks species based on their levels of exclusive mating. Humans fall between meerkats and beavers in terms of monogamy rates. The study analyzed proportions of full versus half-siblings across various mammal species, including humans. This approach provides a more direct measure o...
A study by Iowa State University researchers reveals that avian influenza can infect livestock and humans through their mammary glands, which have high levels of sialic acids. This increases the risk of transmission and potentially more dangerous adaptations emerging.
Researchers found that elephants can learn to ignore drones within minutes of exposure, opening a new window into their behavior and social interactions. The study's results suggest potential for drones as a cost-effective observation platform in elephant conservation.
A study by University of California, Riverside scientists found that alternative RNA processing, or
The study found that genes involved in facial development are largely conserved across species but their regulatory elements vary significantly. Marsupials have unique dunnart-specific regulatory elements near highly-expressed genes related to skin, muscle, and sensory system development.
Researchers have confirmed that six North American bat species emit a greenish light when exposed to UV rays, suggesting it may be an inherited trait used for communication. The study's findings could provide valuable insights into how bats adapt in the past and to future environmental changes.
Researchers created a comprehensive single-nucleus transcriptomic atlas of the pig intestine, identifying 19 major cell types and 58 cellular subtypes. This study provides valuable insights into the mechanisms by which neurons regulate inflammatory responses and the molecular basis for stronger immune functions in wild boars.
This comprehensive metagenomic survey reveals vast gut microbiome diversity, with 21,902 species-level genome bins identified. The study also uncovers a significant reservoir of previously uncharacterized microbes and identifies high-risk antibiotic resistance genes across 14 mammal species.
A new Virginia Tech study analyzes four years of owner-reported data from over 47,000 dogs to establish a baseline for understanding dog behavior on a large scale. The research reveals that dogs are adaptable and shows no substantial changes in behavioral profiles despite the COVID-19 pandemic.
Research suggests that black-tailed prairie dogs can reduce wildfire behavior by altering landscape features and promoting the growth of fire-resistant vegetation. By incorporating prairie dog activity into fire behavior models, land managers could develop more effective strategies for prevention and mitigation.
A video study of wild spectral bats reveals social greetings, food provision, and cooperative foraging behaviors. The bats were found to exhibit gentle and cooperative behavior, recognizing researchers and forming tight cuddle-balls while roosting.
The winner of the 2025 BMC journals Image Competition is a photograph of two male saigas sparring on the banks of a steppe lake. The image, taken by Andrey Giljov, showcases the unique characteristics of saiga antelopes and their survival strategies.
Researchers have developed a 'tap-and-go' approach using specially adapted drones to apply monitoring tags to whales. This innovative method significantly speeds up the process while minimizing human interaction with the animals.
Emerging evidence highlights the involvement of extracellular RNAs in the antiviral defense process, with microRNAs binding viral genomes via base-pairing interactions to inhibit expression. RNA immunity represents a complementary arm of the mammalian immune system, functionally independent of traditional protein-based defenses.
A new study has coined the term 'scrumping' to describe great apes' fondness for eating ripe, fermented fruit from the forest floor. The researchers suggest that this behavior may have played a significant role in the evolution of human alcohol tolerance.
Research found that dog TV viewing habits differ by personality, with excitable dogs more likely to follow on-screen objects and fearful dogs reacting to car horns or doorbells. The study, published in Scientific Reports, suggests that engaging with TV could provide dogs with an enriching experience.
A new study found that mammals independently evolved specialized adaptations for exclusively feeding on ants and termites at least 12 times since the Cenozoic era began. This dietary strategy, called myrmecophagy, emerged following the K-Pg extinction and set the stage for ant and termite colonies to rapidly expand worldwide.
A 26-year study found that removing feral animals like cats and foxes from a reserve sparked an ecological transformation, favoring the growth of smaller rodents like Bolam's mouse and spinifex hopping mouse. Larger species like plains mouse and stripe-faced dunnart also surged in population after five to nine years.
Researchers analyzed over 1,400 gut microbiome samples from 292 mammalian species to find distinct gut microbiomes corresponding to different gut morphology types. These microbiomes were grouped into three enterotypes: Fusobacterium in simple-gut species, UCG-005 in foregut fermenters, and Prevotella in hindgut fermenters.
A new study reveals that koalas only spend around 10 minutes per day on the ground, which is linked to two-thirds of recorded koala deaths. The research used GPS loggers and accelerometers to analyze fine-scale movement patterns, finding that koalas move with little urgency and spend most of their time in trees.
Researchers have discovered adult stem cells from a non-human primate that closely resemble human biology, offering new potential treatment targets for diseases. The discovery uses a novel computational method to identify the optimal animal model, reducing animal usage and paving the way for more effective stem cell therapies.
A study by University of Göttingen researchers found that mixed deciduous-conifer forests promote coexistence between red squirrels and dormice. The team observed both species living side by side in these forests, suggesting a potential role for mixed forest management in supporting biodiversity.
Researchers from Empa's Soft Kinetic group studied the rare scaly-tailed squirrels' unique bodily structure, discovering that their thorn-covered scales help them maintain position and grip onto tree bark. The study aims to inform robotics by adopting morphological structures and behaviors honed through millions of years of evolution.
Researchers found that chipmunks' skulls became larger but teeth shorter due to increased human food availability. Voles' auditory bullae decreased in size possibly to dampen environmental noise. These changes demonstrate the profound impact of humans on wildlife and their environment.
Researchers analyzed fossil and living animal bones to reconstruct the path to upright posture, finding bursts of innovation and adaptive radiations. The study suggests that fully parasagittal postures evolved relatively late in mammalian history, contradicting previous theories.
Researchers have uncovered a new species of Swaindelphys, a large metatherian that lived around 60 million years ago in Texas' Big Bend National Park. The species, dubbed Swaindelphys solastella, is significantly larger than similar species known from the same period.
A study published in PLOS One reveals that cats' purring behavior is linked to genetic variation, specifically the short-type androgen receptor gene. Cats with this gene exhibit higher owner-assessed purring scores than those with the long-type gene.