Articles tagged with Birds
A study published in Ibis used machine learning to predict population trends of 801 bird species worldwide, estimating nearly half are declining. Fragmented populations, particularly non-migratory birds in tropical forests, were found to be the top predictor of population declines globally.
A new analysis has identified common demographic and life history traits among species at risk of extinction. The study found that these traits contribute to patterns of vulnerability, with some species exhibiting higher extinction risks due to factors like smaller population sizes and slower reproductive rates.
A study published in Immunogenetics found that male Kentish Plovers have stronger immune systems than females due to the presence of two active copies of immune genes on their Z chromosome. This may explain why males tend to survive longer than females in this species.
A review by Nathan et al. showcases big-data revolution in movement ecology, revealing new insights into animal behavior and habitat use. Reverse-GPS systems, such as ATLAS, track animals with high accuracy, while acoustic telemetry tracks aquatic life, providing crucial data for conservation.
A recent study published in the Journal of Wildlife Management found that vulture declines are linked to increased disease risks due to their absence. With no natural clean-up crew, diseases spread rapidly among scavenger communities, including feral dogs, which fill the ecological gap left by vultures.
Assistant Professor Emily Cohen at the University of Maryland Center for Environmental Science received a $750,000 NSF CAREER Award to study migrating birds as communities. This research aims to fill critical gaps in understanding animal migration by considering migratory animals as networks of ecological interactions.
Researchers found that different types of ornaments in male yellowthroats are linked to the same superior genes that enhance survival of offspring. Females prefer larger-sized features such as a large black mask or large yellow 'bibs' depending on their location.
The study found that parent birds cut earthworms into smaller pieces and feed them to their nestlings, suggesting a specialized prey preparation behavior. The researchers believe this helps younger nestlings swallow food better.
Researchers discovered that Goffin's cockatoos can coordinate complex tools to solve problems, a cognitive ability previously thought exclusive to primates. This finding sheds light on the evolution of tool use in animals and has implications for understanding human technological skills.
Researchers found that eastern whip-poor-wills from the Midwest breed in a small area of Oklahoma, Arkansas, and east Texas before migrating to Mexico and Central America. The birds' synchronized trip south poses a danger to their population, which has declined by nearly 70% due to habitat loss and urban bird collisions.
A new study by University of Western Ontario researchers finds that fear of predators can reduce prey population growth rates over generations. The study, led by Professor Liana Zanette, demonstrates for the first time in any free-living wild animal that fear itself can halve populations in a short period.
Researchers discovered multiple levels of torpor in hummingbirds, including shallow and deep states, as well as a transition stage between normal sleep and torpor. This flexible control allows hummingbirds to conserve energy while minimizing potential costs, such as increased vulnerability to disease or predation.
Nagoya University researchers have discovered how bird brains compute time differences between sounds reaching each ear to determine their location. This process relies on the clustering of nerve junctions in specialized dendrites dedicated to low-frequency sounds.
Scientists sequenced DNA and measured Island Monarchs, revealing they settle down more readily than expected after colonizing an island. The study confirms the importance of island regions in species evolution, adding new knowledge to biogeography.
Researchers found that males keep track of the order of their songs and how often each one is sung for up to 30 minutes. This complex behavior allows them to curate both their current playlist and the next one, with variations in song order and repeats.
Researchers at UC Riverside have identified a new host protein interaction in chickens that triggers a strong immune response against viral infections. The discovery sheds light on the differences between bird and human immune responses to zoonotic viruses.
A recent comprehensive assessment reveals drastically increased species extinctions and declining populations, indicating the onset of the Sixth Mass Extinction. The study emphasizes the urgent need for conservation efforts and a recognition of humanity's common responsibility to mitigate the crisis.
A recent study by UC Berkeley and Missouri State University scientists found that East African sunbirds have retained their songs for over 500,000 years, with some changes occurring in pulses. This discovery suggests that environmental stability may constrain the evolution of social signals like song.
The regent honeyeater's population is on track to decline to fewer than 300 individuals due to habitat loss and predation. To save the species, conservation efforts must focus on protecting nests from predators, increasing zoo-bred bird releases into the wild, and preserving and restoring habitats.
A study by University of Exeter scientists found that pheasants' heads cool rapidly before a fight, indicating a stress response. After the confrontation, their heads heat up again as normal blood flow is restored.
Researchers at University of Washington documented a mass mortality event among Magellanic penguins in Punta Tombo, Argentina, due to extreme heat. The January 2019 heat wave killed at least 354 adult penguins and 90 chicks, with nearly three-quarters of the deceased being adults primarily due to dehydration.
Researchers have discovered a natural nanostructure in birds that produces iridescent shimmer, finding an evolutionary tweak in feather nanostructure that has more than doubled the range of iridescent colors. This insight could inspire new materials that capture or manipulate light.
Researchers from Ruhr-University Bochum investigated bird brains to understand working memory limitations. They found that birds and monkeys share the same central mechanisms and limits of working memory, with a capacity of about four items of information simultaneously.
Research found that cacao agroforestry systems support unique bird species in tropical dry forests, while bats are more abundant in these areas than in nearby forests. This suggests that cacao farms can serve as biodiversity-friendly oases, providing food and refuge for birds and bats.
A new fossil discovery reveals an extinct early bird that could stick out its tongue, with a bony tongue nearly as long as its head. This finding provides insights into the evolution of feeding mechanisms in birds, highlighting the variation in skull shape and size among ancient species.
Researchers found that three recognized Redpoll species are genetically identical, differing only by a 'supergene' controlling plumage color and morphology. This finding builds on previous research suggesting this might be the case, using greater genetic technological capability to examine the full genome of the birds.
Researchers provide evidence that mammalian and avian primitive streaks evolved independently, using different mechanisms to form the body plan. They suggest alternative landmark for ethical oversight in human embryological research.
Researchers developed a perching robot inspired by birds, called SNAG, which can fly around, catch objects, and land on different surfaces. The robot's design mimics the legs of a peregrine falcon, allowing it to absorb impact energy and convert it into grasping force.
Researchers used GLS tracking data to study sooty terns' migration patterns, showing they range up to 2,900 km from breeding colonies and cover 47,000 km during an eight-month migratory period. The largest breeding population of terns is on Ascension Island, which was designated a Marine Protection Area in 2019.
Researchers examined social media posts promoting live bird sales from West Africa, finding 83 species for sale, including endangered parrots. Social media platforms must work with wildlife experts to detect harmful content, as algorithms alone are not enough.
Researchers found that dopamine stimulates female songbirds' preference for certain songs, affecting mating choice and memory. By manipulating dopamine levels, the team demonstrated lasting changes in song preferences, advancing our understanding of auditory perception.
Researchers at OHSU have discovered a unique neural cell assembly that enables complex learning in songbirds, similar to those found in the human primary motor cortex. This finding has implications for understanding fine motor control and may lead to new avenues for treating disorders such as ALS.
Researchers at Tel Aviv University conducted a cross-adoption experiment with fruit bat pups to determine whether boldness is genetic or learned. The findings indicate that the pups behave like their adoptive mothers, not biological mothers, suggesting that boldness is an acquired trait passed on through mother's milk.
The 74th APS Division of Fluid Dynamics Annual Meeting featured presentations on COVID-proofing daily life, kimchi physics, and extreme heat waves. Researchers also discussed advancements in fire-fighting trees and the science behind jellyfish engineers.
Amazon Rainforest birds have reduced body mass by an average of 2% every decade since the 1980s, with most species losing about 27.6 grams on average. The birds' bodies and wings have also changed to become more energy-efficient in flight, with longer wings and lighter bodies adapted to hotter and drier conditions.
A new study found that human-caused bird extinctions lead to the loss of ecological roles, including pollination and seed dispersal. Introduced alien species do not fill these gaps, highlighting the disproportionate impact of human actions on biodiversity.
A study found that female zebra finches are choosy but flexible in their mating preferences, allowing them to avoid fitness costs. The researchers discovered that these 'wallflowers' can still produce successful fledglings by sneaking eggs into other birds' nests.
A new study reveals that spring soundscape acoustic diversity and intensity are declining due to changes in bird communities. The research suggests that reductions in natural soundscapes may be the primary mechanism through which population declines impact humans.
Researchers found that two bird species in Patagonia regularly consume truffles and disperse viable spores through their droppings. The study confirms birds play a role in spreading truffles, an important part of a healthy forest ecosystem.
A study published in Current Biology found that a mutation affecting the expression of a key carotenoid pigment gene is responsible for the yellow color of some Darwin's finch nestlings. The genetic basis for this variation was poorly understood, but researchers were able to identify the underlying mechanism using modern genetic tools.
Researchers found that African greys waited up to 29.4 seconds for preferred food, while blue-throated macaws only waited 8.3 seconds. Pacing was the most effective waiting behaviour among parrots.
Research found mixed effects of hunting regulations on sage grouse populations, with some areas experiencing increased growth rates after discontinuing harvest. State wildlife agencies have adjusted hunting seasons to conserve the species, but more work is needed to understand patterns and focus conservation efforts.
Researchers found that stronger hurricanes trap and transport more birds due to their intense winds and thunderstorms. The study used radar data from 33 Atlantic hurricanes between 2011 and 2020, revealing a correlation between hurricane intensity and the presence of birds within the eye.
A new study by the University of Exeter reveals that domestic cats rely almost entirely on their owner-provided food for nutrition. Despite being prolific hunters, cats only consume a small percentage of the prey they catch.
Researchers tracked individual Kirtland's Warblers and found that their gut bacteria differed in The Bahamas and Michigan. This suggests that birds' microbiomes adapt to changing environments during migration.
A 63-bone fossil discovery of Archaehierax sylvestris, a 25-million-year-old eagle-like raptor, has been made in South Australia. The species is one of the oldest eagle fossils known from this period and provides insight into raptor evolution in Australia.
By reading electrical signals in a bird's brain, researchers can predict specific syllables and when they will be sung. This breakthrough technology has the potential to develop vocal prostheses for humans with speech disorders.
A new study from the Kalahari Desert finds that teamwork allows birds to cope with brutally unpredictable environments. The research team at the University of Exeter shows that families with more helpers successfully raise more chicks in dry conditions, reducing weather-driven variation in breeding success.
Researchers successfully detected local mammals and birds by collecting 18 litres of water from a two-kilometre stretch along the river Mulde. The team identified 50% of fish species, 22% of mammal species, and 7.4% of breeding bird species in the region.
Despite 10,000 years of inbreeding, the kākāpō genome sequencing reveals that the species has lost potentially deleterious mutations and now carries fewer harmful mutations than extinct mainland populations. This finding suggests that natural selection may have facilitated genetic purging in small populations.
Researchers have identified global hotspots where bird malaria is spreading rapidly, with significant impacts on bird populations. The study found that climate and forest conditions play a crucial role in predicting infection risks, highlighting the need for conservation efforts to protect bird species from this deadly disease.
Researchers are studying how climate change is forcing animals to evolve and adapt, with changes in beak and ear sizes reported in birds and tail length increases in mice, experts warn that these changes may have unintended ecological consequences
Researchers at the University of California - Riverside discovered that hummingbirds can avoid insects with defensive compounds, such as formic acid, which harm birds. The study shows that scent plays a crucial role in hummingbird foraging decisions and ecosystem function.
Researchers at Flinders University found that embryos of three bird species can distinguish between their parents' calls and non-specific sounds, building on complexity of vocal learning. This study paves the way for new insights into evolutionary and developmental timescales.
Researchers used flight efficiency estimates from museum specimens to predict bird dispersal distances, revealing that species with elongated wings can disperse farther. This study has applications in biodiversity conservation, as reduced flight capabilities may threaten bird populations.
Researchers found that over a quarter of female white-necked Jacobin hummingbirds exhibit showy colors similar to males, aiding in evasion of aggressive behaviors during feeding and mating. This study suggests that the display of flashy colors is driven by social selection rather than sexual selection.
Researchers found that one-third of female hummingbirds resemble males, allowing them to feed without being attacked. This phenomenon suggests non-sexual social selection plays a role in the evolution of female ornamentation.
Research team investigates urbanization's impact on farmland bird communities in Bangalore, India, finding that urbanization homogenizes bird species, eliminating insect-eating birds essential for pest control. The study highlights the importance of preserving biodiversity to maintain ecosystem resilience and food production systems.
Researchers from Cornell University have identified key factors in bird-plane collisions, including the time of year and species size, to inform collision avoidance strategies. The study predicts that risk for damaging strikes during periods with high migration intensity increases by up to 700%.
A new method validates up to 70% of diurnal bird image identifications on Flickr. The technique uses image features and machine learning algorithms to identify bird species.