A new study reveals that species with larger brains produce fewer but larger offspring, leading to the evolution of larger eggs. The research analyzed data from mammals, birds, and reptiles, suggesting that brain evolution drove changes in reproduction across dinosaurs and birds.
Researchers found over 5 million amphibians and reptiles relocated in BC between 2019-2022, primarily for development projects. The lack of post-relocation monitoring raises concerns about the effectiveness of these efforts in supporting population persistence.
The fossil discovery of a giant ichthyosaur with injuries in Northern Bavaria has provided new insights into the species' anatomy and behavior. The animal's modified skeleton, likely caused by injuries, suggests that it may have had to change its diet to survive.
A new study reveals that colossal octopuses were top predators in Cretaceous oceans, with species like Nanaimoteuthis jeletzkyi growing up to 19 meters in length. The discovery suggests these creatures played a significant role in shaping marine ecosystems, potentially preying upon large vertebrate apex predators.
A new review reveals major blind spots in Bhutan's amphibian and reptile research, with most studies focusing on species records and ecology. The study highlights the need for deeper research on genetics, disease, physiology, and long-term conservation to strengthen conservation efforts.
Researchers uncover 289 million-year-old mummy of lizard-like creature Captorhinus aguti, preserving skin, cartilage, and protein remnants. The find reveals the oldest example of costal breathing system in amniotes, shedding light on early reptile evolution.
A 289-million-year-old mummified reptile has provided scientists with a unique window into the evolution of breathing and movement in ancient reptiles. The study found that the reptile's respiratory system is similar to that of modern reptiles, birds, and mammals, suggesting an efficient mechanism for respiration.
A new study compares the bite efficiency of fossil reptiles using advanced engineering simulations, revealing distinct feeding biomechanics in Late Cretaceous marine reptiles. The research team recreated the biting behavior of coexisting marine predators and identified differences in biting performance across species.
A new study reveals that ectotherms, including fish and reptiles, are unable to fine-tune their physiology to cope with daily temperature changes, leaving them vulnerable. The research suggests that these animals will rely on behavioral strategies or genetic adaptation to survive in a warmer climate.
Researchers investigated temperature-dependent sex determination in leopard geckos, finding that temperature influences sex development during a specific window of embryonic development. Early genetic changes, including the activation of male and female developmental pathways, occur before physical differences become apparent.
Researchers found a mosasaur tooth in North Dakota that revealed the giant reptile's ability to thrive in freshwater rivers. The study used isotope analyses to show that mosasaurs inhabited riverine environments in their final million years before extinction.
Researchers used CT scans to study brain cavities in ancient reptiles and found that pterosaurs had relatively small brains compared to birds. The study suggests that flight evolved independently in these groups without requiring significant brain changes.
A team of international scientists reconstructed size evolution in ancient sharks using interdisciplinary analysis. The study revealed that modern sharks experimented with enormous body sizes much earlier in their evolutionary history than previously suspected.
A new species of wolf snake, Lycodon irwini, has been discovered in the Great Nicobar Islands and named in honor of Steve Irwin. The snakes are glossy black, non-venomous, and likely feed on reptiles and small mammals.
A study of an Early Triassic-age fossil site in the Arctic found complex and diverse oceanic ecosystems, with many marine tetrapod lineages diversifying soon after the end-Permian mass extinction event. The findings suggest that vertebrate evolution paralleled the rapid resurgence of invertebrate life in the Early Triassic.
The discovery sheds light on marine ecosystems' rapid recovery and complexification after the end-Permian mass extinction. The Spitsbergen fossil deposit reveals diverse marine reptiles, including archosauromorphs and ichthyosaurs, with some species reaching 5m in length.
A new study reveals that island reptiles are more threatened with extinction than mainland species, yet remain largely ignored by researchers. The study found that 30% of island-dwelling reptiles are threatened, while only 6.7% of reptile-focused research publications have studied them.
A new study reveals that climate change is driving many native Australian reptiles toward extinction. The research uses fossil evidence and genetic data to show how the endangered Australian Mountain Dragon has responded to major environmental changes in the past.
Researchers discovered that duck-billed dinosaur 'mummies' are actually delicate clay molds formed by microbes as they decayed. The unique preservation reveals complex hide patterns, similar to modern squamates, with functional and morphological similarities to some reptiles.
Scientists studied the crystalline waste of over 20 reptile species and found spheres of uric acid in all of them. This unique packaging method may inform treatments for human conditions like kidney stones and gout.
A new index tool evaluates species' conservation priority based on future threats and traits, identifying reptiles as highest priority. The Proactive Conservation Index complements existing tools, offering insights into understudied species and facilitating proactive conservation strategies.
A team from the University of Liège has developed equations to estimate the size of large marine reptiles from incomplete fossil skeletons. This allows for a better understanding of the evolution and ecology of these marine predators.
The Nationwide Herp Adoption Program provides a health-verified solution for surrendered reptiles and amphibians, offering invaluable training opportunities for future veterinarians. The program protects wild amphibians and reptiles by reducing the release of unwanted pets into the wild.
Two baby pterosaurs, aged less than 20 cm with broken wings, were found to have died from powerful storms that also preserved hundreds of other fossils. The discovery explains why smaller fossils are well-preserved, as they were a direct result of storms.
Two studies published by the Universitat Autonoma de Barcelona team reveal how extreme temperatures impact the reproductive process in reptiles and fish. The research found that changes in temperature can increase DNA fragmentation and alter chromosomal structures, leading to increased genetic diversity and adaptation to climate change.
A study in Nature Communications reveals that older species typically have larger geographical ranges, except for island dwellers. On the mainland, this relationship holds true, while on islands, younger species can attain larger ranges due to unique environmental dynamics.
A team of researchers has discovered a unique fossil structure in the early Middle Triassic reptile Mirasaura grauvogeli, which challenges our understanding of reptile evolution. The fossil's complex skin appendages, resembling feathers but without branching, suggest that such structures evolved independently of bird feathers.
Research on translocating the endemic pygmy bluetongue lizard to cooler, greener locations aims to improve its survival chances. The study found that while acclimatization may take longer than two years, these lizards can cope with translocation as a mitigation strategy in the long term.
A new study reveals that lagerpetids, relatives of pterosaurs, were able to tolerate a wide range of climate conditions and distributed widely across the globe. In contrast, pterosaurs initially required more humid tropical conditions to fly.
A nearly complete fossil of Westlothiana lizziae, a four-legged creature, has been dated to 346 million years ago, shedding new light on the evolution of amphibians, birds, reptiles, and mammals. This age places the specimens in Romer's Gap, a pivotal time period where water-dwelling fish transitioned to land animals.
A study by Kobe University found that Japanese wasp larvae feed on a diverse range of species, including birds, mammals, reptiles, amphibians, fish, and insects. The research used DNA metabarcoding to identify the gut contents of larvae from wild and reared nests, revealing significant differences in prey composition between the two.
The discovery of a 355-million-year-old sandstone slab in Australia reveals the earliest clawed footprints ever found, challenging the long-held timeline of tetrapod evolution. The findings suggest that reptiles evolved significantly earlier than previously thought, impacting the entire evolutionary history of amniotes.
Newly discovered fossil tracks in Australia indicate that reptiles originated on land around 350 million years ago, pushing back their evolution by 35-40 million years. This discovery provides significant insights into the early evolution of tetrapods and challenges previous records of their emergence.
A new study analyzed phylogenetic relationships and predatory capabilities of Cretaceous marine reptiles, finding elevated rates of extinction targeting large and fast predators. The Cenomanian-Turonian transition, with high carbon dioxide concentrations and ocean anoxia, was associated with distinct bite force and species diversification
A study by the University of Leicester has successfully linked fossilised footprints to distinct groups of pterosaurs, shedding light on their lifestyles and behaviors. The discovery supports the idea that pterosaurs underwent a major ecological shift during the middle part of the Mesozoic era.
A study from Lund University found that reptiles living in open habitats generally have brighter colouration than those in denser vegetation. The researchers analyzed images of 10,638 species and discovered a strong connection between light colors and open habitats over the past 200 million years.
A nearly complete Plesiopterys wildi specimen from Germany offers fresh insights into plesiosaur diversity and regional specialization. The discovery highlights the Early Jurassic as a crucial period for plesiosaur evolution and biogeography.
Researchers create detailed atlas of mouse face development, tracing key stages from embryonic to pre-birth. They find early head and nerve patterns common in jawed vertebrates, but with a unique mammalian twist.
A recent study by Indian Institute of Science found that tropical lizards, such as rock agamas, prioritize variable food sources over constant ones when hungry. This flexible approach helps them thrive in unpredictable conditions.
Researchers found that larger species have higher cancer rates than smaller ones, with some species even having better natural defences against cancer. The study challenged the long-standing Peto's paradox and provided insight into how superior mechanisms of cellular defence can evolve in larger species.
Researchers mapped bird brain regions and found similar cellular composition and evolution across species. Certain excitatory neurons have a common evolutionary origin, challenging existing assumptions about brain region evolution.
A team of researchers from Lund University analyzed the soft tissue from a 183-million-year-old Jurassic plesiosaur, discovering a mix of smooth and scaly skin. The findings suggest that the long-necked marine reptile used its smooth skin to swim efficiently and its scales for navigating rough seabeds.
The 'Under the Snakefluence' study surveys people in 20+ countries to understand public perceptions of snakes and assess educational efforts to promote safe coexistence. Research shows that delaying medical treatment can be fatal or cause permanent disability.
The University of Texas at Arlington's Amphibian and Reptile Diversity Research Center (ARDRC) has expanded its library with a donation of over 10,000 rare items, including books, scientific journals, and reports. This addition will provide scientists worldwide with access to a wealth of literature on reptiles and amphibians.
Researchers compiled a reference framework of isotope compositions indicating the type of diet for extant reptiles, providing a useful dataset to reconstruct the diet of fossil reptiles. The analysis showed that calcium isotope ratios are higher in insectivorous reptiles and lower in herbivores and carnivores.
Researchers have discovered a new dinosaur species in present-day Wyoming that challenges the mainstream view on dinosaur emergence and spread. The 230-million-year-old fossil remains suggest dinosaurs were present in the northern hemisphere millions of years earlier than previously known.
Researchers found that marine animals across species save energy by swimming at similar relative depths when traveling and not feeding. This 'sweet spot' minimizes wave formation and vertical distance traveled, allowing animals to conserve energy on long journeys.
A new species of flying reptiles, Melkamter pateko, has been discovered in the late Early Jurassic of Chubut province, Argentina. The find pushes back the origin of the advanced pterodactyloids by 15 million years, suggesting a more complex evolutionary history.
New information and guidance on monitoring and managing ranaviruses are provided in the second edition of Ranaviruses: Emerging Pathogens of Ectothermic Vertebrates. Ranavirus infections have been confirmed in over 177 species, causing mass die-offs and affecting biodiversity.
A new pterosaur species reveals key transitional changes between early and later groups, shedding light on the evolution of these flying reptiles. The complete specimen helps bridge the gap in understanding how they transformed from smaller to larger sizes.
A targeted outreach initiative in Palm Beach County led to an increase in reported sightings of invasive reptiles, including Nile monitors and Argentine black-and-white tegus. The effort engaged over 112,000 people and resulted in 55 reported sightings, highlighting the effectiveness of community involvement in detecting invasive species.
A Simon Fraser University study ranks Canadian terrestrial vertebrates by their level of evolutionary distinctness, finding that amphibians and reptiles are the most distinct species. The spiny softshell turtle is the most evolutionarily distinct terrestrial animal in Canada.
The study of turtle genomes provides crucial information for the development of effective conservation strategies and the understanding of the evolution of sex chromosomes. Researchers have identified a novel three-dimensional chromatin conformation in both lineages, allowing for centromere-telomere interactions.
A new species of small, venomous reptile has been discovered in the Late Triassic Chinle Formation in northeastern Arizona. The species, Microzemiotes sonselaensis, features distinct grooves on its teeth that likely facilitated venom delivery, indicating a reliance on venom in its feeding strategy.
A decade-long analysis of wildlife rescue records in NSW reveals a bias towards larger reptiles, with two species accounting for almost two-thirds of all rescues. Human behavior and environment play significant roles in shaping these interactions.
Researchers at Cornell University have discovered an easy-to-reach location on the back of a reptile's head to take their pulse rate, corresponding to heart rate in healthy animals. This technique allows for a more complete cardiovascular examination and can be used to treat animals under anesthesia or when they're feeling defensive.
Rutgers University scientists discovered a virus that caused the nationwide die-off of superworms, a common food for birds and pets. They used an advanced form of microscopy and insect slurry to identify the pathogen, paving the way for future diagnosis and vaccine development.
A group of scientists discovered that the Black and white tegu lizard can raise its own body temperature during the reproductive season, even in a dark burrow. The study found that this phenomenon is due to the increased production of mitochondria and a protein called ANT, which generates heat.
A new study at Tel Aviv University found that geckos experience a sharp increase in metabolic rates when exposed to rocket explosions, leading to energy depletion. The researchers hypothesize that this stress response may apply to many other animals in conflict zones.
Scientists discovered that Komodo dragons' serrated teeth are tipped with iron, giving them razor-sharp cutting edges. This unique feature may provide clues about how carnivorous dinosaurs like Tyrannosaurus rex killed and ate their prey.