Articles tagged with Birds
Researchers found that birds grouped together are less susceptible to West Nile virus infection, with a significant decrease in exposure compared to solo birds. This phenomenon, known as the 'encounter-dilution effect', suggests that individual risk is minimized when multiple birds roost together.
Researchers from the University of Southampton have discovered that feather shafts exhibit varying layer thickness and orientation according to flight style. This finding challenges previous assumptions about feather morphology and opens doors for innovative engineering applications.
A study found that artificial light in city centres extends the daily activities of blackbirds, allowing them to forage for longer. Males are more active later than females due to their larger eyes and differing sensitivity to light.
A study by University of Wisconsin-Madison researchers found that climate change is causing smaller, southerly distributed bird species to move northwards, altering the composition of winter bird communities in eastern North America. This shift is likely driven by warmer temperatures and changing precipitation patterns.
A comprehensive new evolutionary 'tree of life' for the tropical cotinga family has been generated, providing insight into the evolution of over 60 species. The study reveals that sexual selection appears to have played a role in the evolution of non-plumage gender differences in some cotinga species.
Research finds that a vaccine protecting against an old avian flu strain primes the immune system for a rapid response when a new vaccine is given a year later. Combining this with an adjuvant, a lower dose of the new vaccine works better in triggering an immune response than a stronger dose without it.
A new computational method suggests that Darwin's 'jump dispersal' theory is supported by strong evidence, especially for island species. The study found that jump dispersal can explain the biogeography of Hawaiian Islands and other archipelagos with a greater statistical probability than vicariance methods.
UConn scientists have found a way to prevent Monk Parakeet nests from causing power outages and public hazards on utility poles. By blocking the pathway to their nests, researchers can keep these invasive birds from building huge nests that weigh up to 200 pounds and cost electric utility companies millions of dollars annually.
A comprehensive family tree of meat-eating dinosaurs reveals the gradual emergence of bird-like features, such as feathers and wishbones. The study supports a theory that sudden evolutionary changes led to an explosion in avian diversity, resulting in thousands of species today.
Researchers found no significant difference in take-off performance between peacocks with and without their iconic trains. Despite initial expectations, the elaborate plumage does not seem to be a costly sacrifice for male birds. However, it may still affect flight stability and running ability.
A team of researchers challenged traditional views on how birds ended up in the Neotropics, proposing speciation driven by bird movements across physical barriers. The CCNY analysis suggests that geological changes may not have been the primary driver of biodiversity.
Researchers find that geographic isolation is more often due to bird movements across physical barriers, suggesting a generalizable explanation for speciation initiation. The study also highlights the importance of prolonged landscape stability and human alterations in killing the speciation process.
A new study reveals that tropical bird speciation is driven by movements of birds across physical barriers, contradicting the long-held view that it's linked to geological and climate changes. The research found most speciation occurred in the Pleistocene era, long after the origin of mountain ranges.
A new study suggests that conserving the precious Atlantic Forest in Brazil could be achieved by investing US$198 million per year, equivalent to 0.01% of the country's annual GDP. This would require setting aside land for reforestation and preserving at least 30% of native habitat to maintain current levels of biodiversity.
Research reveals that the population structure of feather lice matches that of Galápagos hawks across the archipelago, indicating a co-evolutionary relationship. This study provides evidence for the hypothesis of co-divergence between parasites and hosts as a major driver of biodiversity.
A team of researchers from York University created the first ever migratory connectivity map produced for a songbird, using tracking from both breeding and winter sites. The study reveals that wood thrushes have dual citizenship, with Canadian birds migrating to Nicaragua for the winter.
Researchers found that New Caledonian crows can discriminate between different volumes of water and pass a modified test, previously only achieved by 7- to 10-year-old children. The birds' ability to choose options that displace more water suggests they attend to cause-and-effect relationships.
Research finds hybrid birds take longer, more difficult routes than their parent species, with strong genetic control of migratory behavior. The study suggests that mixed genetic background helps maintain the diversity of songbirds.
Researchers used geolocators to track songbirds' migration patterns, finding that hybrid species exhibited increased variability in their routes. This study supports the hypothesis that differences in migratory behavior can act as postmating reproductive isolating barriers.
Researchers at Queen Mary University of London developed an automatic analysis technique to identify characteristics of bird sounds from recordings. The system combines feature-learning and classification algorithms to distinguish between bird species in a large dataset, with promising results in public contests.
A new model analyzing bird responses to climate change suggests that precipitation, not temperature, is the key factor influencing population trends. The study found that changes in precipitation can affect plant growth, soil moisture, and insect abundance, leading to declines in certain species.
A recent study reclassifies Scansoriopteryx as a non-dinosaurian bird, with characteristics like elongated forelimbs and wing feathers. The findings validate predictions from the early 1900s that small, tree-dwelling archosaurs are the ancestors of birds.
A new study using geolocators on lark sparrows reveals individual migration routes and differences in pace. The birds took unique routes to Central Mexico, differing in their overall pace.
Researchers discovered a specialized bird pollination system in Axinaea flowers, where birds consume male reproductive organs to receive pollen and nutrients. This complex mechanism involves the 'bellows' organ, which blasts pollen onto the birds' beaks as they forage.
Scientists have discovered a new pathogen, Trichomonas stableri, linked to recent mass die-offs of Pacific Coast band-tailed pigeons. The parasite, along with ancient species Trichomonas gallinae, causes severe lesions that can block the esophagus or trachea, leading to suffocation.
A new study explains how Avibase, an online global database of birds, successfully addresses issues related to standardized scientific names and their meanings. The database pairs scientific names with citation definitions using taxonomic concepts.
A new study by ecologists at Penn State found that grassland bird populations declined due to the loss of habitat, rather than insecticide use. The researchers analyzed population data from the US Geological Survey and found a strong positive association between CRP lands and grassland bird trends.
Researchers dispel the idea of evolutionary trade-offs between plumage and song in a large study of tanagers, a family of songbirds from Central and South America. The study found that some species can exhibit both flashy colors and complex songs without sacrificing one for the other.
A UCI-Wesleyan study found that caterpillars with varied diets are less camouflaged and easier prey for birds. This increased risk is offset by the benefits of reduced predation on plants that caterpillars with restricted diets consume.
The new Birdsnap app, developed by Columbia Engineering researchers, can identify 500 common North American bird species using computer vision and machine learning techniques. It offers users various ways to organize species and even annotates images with distinctive parts for easy identification.
Researchers from India, US, Germany, and Sweden study songbirds in the Himalayas, finding significant genetic differences between closely related species. The team concludes that the region's saturated habitats hindered new species evolution.
A new study by the University of Adelaide's Australian Centre for Ancient DNA has solved a 150-year-old evolutionary mystery about the origins of giant flightless birds. The research found that the kiwi is most closely related to the extinct Madagascan elephant bird, contrary to previous claims.
Researchers found that conventional oil and gas development in northern Pennsylvania is altering bird communities, with songbird species being pushed out and generalist species taking their place. The study revealed changes in avian guilds resulting from oil and gas development, suggesting a loss of community uniqueness.
New indicators of social and environmental well-being are being used to measure a nation's success beyond Gross Domestic Product (GDP). These include birth weight, hours slept, eyeglasses, city birds, washing machines, and teenage schoolgirls, highlighting the need for broader measures of societal progress.
A recent study assembled a large dataset using ancient moa DNA and found convincing evidence that tinamous are closely related to extinct moas, leading to independent loss of flight. Morphological characters of ratites were mostly convergent, evolving independently as adaptations to a cursorial lifestyle.
Researchers found that European birds are expanding their ranges into UK nature reserves, but non-native wetland birds such as the Black Swan and Egyptian Goose are also invading protected areas. The study highlights the importance of conservation efforts to tackle these invasions and protect native species.
Researchers from the University of Missouri found that juvenile songbirds are vulnerable to environmental hazards, especially during the first three weeks after leaving their parents' nests. The study emphasizes the importance of providing suitable habitats for young birds to survive on their own.
A study found that dinosaurs showed rapid rates of body size evolution in early forms, but these slowed down over time. However, the evolutionary line leading to birds continued to change size at this rate for 170 million years, producing new ecological diversity not seen in other dinosaurs.
A study found that birds underwent rapid body size changes to exploit new ecological niches, while other dinosaur lineages stagnated. The team estimated the body mass of 426 species using leg bone thickness, revealing a prolonged period of high evolutionary rates in the lineage leading to birds.
Researchers discovered that finches in the Galapagos Islands use treated cotton to kill parasitic fly maggots, protecting baby birds and potentially helping endangered species. The biologists tested this self-fumigation method on Darwin's finches, showing that it is effective against the nest fly Philornis downsi.
Researchers found that filling of ecological niches slows the diversification of Himalayan songbirds. The study, which analyzed genetic relationships between 461 songbird species, discovered that eastern Himalayan species are separated from each other by six to seven million years, suggesting a slowing of evolution.
Researchers found a negative relationship between predation pressure and bird longevity, supporting the classical theory of ageing. The study analyzed data from nearly 1400 bird species, revealing that larger species with faster reproductive rates tend to live shorter lives.
Researchers found that effective communication involves both signalers and receivers, with groups of males called leks increasing accuracy for females. Investing in ecological structures showed a weak improvement in signaling ability, while using non-food items reduced accuracy.
Researchers analyzed breeding bird surveys for 40 songbird species over 35 years and found they shifted either northward or to higher elevation in response to climate change. This suggests previous studies may have underestimated the effects of environmental warming by only looking at one factor.
A new study finds that several iconic Adirondack birds are in trouble, with declines driven by the size of their wetland habitats, connectivity, and proximity to human infrastructure. The analysis suggests that these species face challenges in this environment, particularly due to climate change and habitat alteration.
A team of scientists ranked nearly 10,000 bird species by their evolutionary distinctness, identifying over 100 areas requiring additional protection to safeguard avian biodiversity. The study, published in Current Biology, reveals that Indonesia, Australia, and New Zealand are leading countries in preserving irreplaceable species.
A Yale-led research team developed a new approach to species conservation that prioritizes genetic and geographic rarity. The method was applied to all 9,993 known bird species, revealing areas where maximum conservation of bird diversity can be achieved with minimal investment.
Support for natural history study appears to be in decline in developed countries, despite its importance for human health, food security, and conservation. Experts are now calling for a revival of the practice to reclaim its role in understanding organisms and their interactions with the environment.
A new study by University of Sheffield researchers found that warm spring weather increases the survival rate of British small bird species. The research challenged a common assumption about the cause of death for these birds during winter.
A study by Cornell University researchers found that the hybrid zone between Carolina and Black-capped Chickadees is moving northward at a rate of 0.7 miles per year, mirroring warming winter temperatures. The study uses genetic analyses and crowdsourced data to track the birds' movements and identifies females as leading the charge.
Researchers discovered 3D plumes of brain activity propagating through the avian brain, differing from mammalian slow-wave-sleep patterns. This finding suggests alternative computational properties and challenges the layered organization assumption.
A team of researchers found that 71% of surveyed birds had female song, contradicting the long-held assumption that bird song is an exclusively male trait resulting from sexual selection. The study suggests that social selection may have played a role in the evolution of bird song, with both males and females competing for resources.
A study published in PLOS ONE has clarified the number of moa species that existed, with researchers using a DNA barcoding technique to determine species status for the extinct Euryapteryx moa genus. The findings suggest that two species likely existed and possibly some subspecies, revealing complex species status.
Researchers found that male chipping sparrows form 'dear enemy' alliances with weaker neighbors to prevent stronger rivals from moving in. In a surprise discovery, these coalitions were shown to be rare and often based on specific vocal relationships.
Scientists discovered that key characteristics of flight, such as body size and forelimb length, evolved simultaneously in a group of dinosaurs. These findings suggest that birds arose through multiple evolutionary steps, with powered flight emerging later.
Great tits can recall the location of cached food hideaways after one or 24 hours, according to a Swedish study published in Behavioral Ecology and Sociobiology. This observational spatial learning ability may be more crucial for non-hoarders like great tits, as it helps them survive during harsh weather conditions.
Researchers found numerous bird nests and a greater diversity of species in no-till soybean fields compared to tilled fields. The study highlights the importance of agricultural practices in supporting bird abundance and diversity.
A study found that yellow-breasted chat males visit multiple territories at night to search for partners during their fertile period, increasing reproductive success. The researchers used radio transmitters and triangulation software to track the birds' movements, revealing a previously unknown behavior in diurnal species.
In Switzerland, plants have shifted uphill by 8 meters, butterflies by 38 meters, and birds by 42 meters between 2003 and 2010. Climate warming is causing species to adapt at a surprising pace.
A recent study used DNA barcoding to identify Dutch bird species with high resolution, flagging some for further investigation. The approach was particularly useful in museums, such as the Naturalis Biodiversity Center, where DNA tissue vouchers are already prepared.