Articles tagged with Birds
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A team of researchers has discovered a new species of Polynesian sandpiper, the Prosobonia sauli, from fossilized bones found on Henderson Island. The bird is believed to have gone extinct soon after humans arrived on the island, which archaeologists estimate happened no earlier than the eleventh century.
Research reveals that many songbird parents displace nestlings too early, reducing the offspring's chances of survival. However, this behavior allows parents to minimize risks and increase their own likelihood of raising at least one offspring to independence.
A study analyzed 18 songbird species and found that postfledging bottlenecks increased the survival rate of at least one offspring, suggesting parental manipulation can harm fledglings. The findings imply that parent-offspring conflict may impact other animals' life transitions.
A study found that both temperate and tropical birds can tolerate high temperatures, with some species, such as doves and pigeons, exceeding heat limits, providing a buffer against climate warming. However, caution is needed as indirect effects on resources and forest structure may impact bird populations.
A new study found that noise and light pollution alter bird nesting habits and success in North America. Birds responding to increased light may track climate change better than those in darker habitats. Noise pollution affects birds differently, with forested environments being more sensitive to noise.
Feather color changes in birds are influenced by molt, which is necessary for flight and attracts mates. Birds that migrate farther distances replace more feathers during their journeys.
Researchers found a relationship between zebra finch gut microbiome characteristics and cognitive performance, identifying potentially critical bacteria affecting learning and memory. The study provides evidence for the 'microbiota-gut-brain axis' in songbirds, raising questions about the generality of this system across species.
A new study by Duke University researchers reveals that dull-colored birds like Bengalese finches categorize colors in a unique way, focusing on brightness rather than hue. This difference is attributed to their evolutionary environment and the signals they've adapted to detect.
Researchers have identified volatile organic compounds used for olfactory navigation by homing pigeons, generating regional olfactory maps that can be used as a compass to return home from unfamiliar sites. The study provides evidence for the existence of suitable regional chemical gradients in the air.
Researchers found genes involved in sensory perception showed accelerated evolution, including those for light perception, dim-light vision, and retina development. The study also identified 32 genes related to DNA packaging and chromosome condensation, which may enable owls to channel light more efficiently.
A recent study shows that rare terrestrial mammals and birds are more threatened by human activities than common species, with many facing extinction within 40 years due to climate change. Conservation efforts must account for the ecological rarity of these species to ensure their survival.
Researchers from Trinity College Dublin found that male and female Sulawesi Babblers have evolved to attain different sizes on small islands, reducing competition by feeding on scarce resources. This discovery provides new insights into the importance of sexual dimorphism in island ecosystems.
Birds breeding earlier due to climate change face increased risk of mortality, as chicks hatch into unpredictable weather conditions. This study examines the impact on Tree Swallows, finding that advancing breeding dates result in reduced availability of food resources, exacerbating the effects of climate change.
A study of fossil records reveals that human arrival in the Bahamas caused devastating effects on birds, with some species losing their habitats and going extinct. The researchers found that many bird species, such as parrots and hawks, were still present in the islands until around 1,000 years ago.
A fossil analysis reveals that 69% of Bahamian land bird species have changed their distributions in response to human activities and climate shifts. The study found that bird populations are at risk due to factors such as increasing hurricane severity, rising sea levels, and habitat loss.
Research reveals that a group of parasitic finch species in Africa have evolved to mimic their host's chicks with astonishing accuracy. The study found that nestlings of these 'brood-parasitic' finches mimic the appearance, sounds and movements of their grassfinch host's chicks.
Researchers use innovative microscopy method to analyze bird brain structure, finding similarities with mammalian neocortex. The study reveals horizontal and vertical layers, refuting long-held assumptions about avian brain organization.
A research team has cleared up 150 years of false assumptions about bird brains. The study found that avian brains are organized similarly to mammalian brains, with fibers arranged horizontally and vertically in columns.
Two studies found that birds' pallium exhibits a layered architecture similar to mammals', potentially enabling complex cognitive abilities like consciousness. This structure may have been present in the last common ancestor of birds and mammals 320 million years ago, or evolved independently through convergent evolution.
A new study shows that protected areas are effective in conserving rare and threatened bird species, particularly those with small ranges or specialized forest habitats. The research used citizen science data from eBird to analyze over 2.6 million bird observations from 7,000 observers across eight tropical biodiversity hotspots.
A recent study published in Conservation Letters reveals that conservation efforts have prevented the global extinction of at least 28 bird and mammal species since 1993. The species include the Puerto Rican Amazon, Przewalski's Horse, and Iberian Lynx, among others.
Small-scale poultry farmers in Vietnam quickly sell their birds during viral outbreaks to avoid financial loss, increasing disease transmission. This practice can contaminate other birds and expose consumers to risk.
Research from the University of Montana found that tropical songbirds reduce reproduction during severe droughts, but this shift actually increases their survival rates. Long-lived species experience higher survival rates during drought years than non-drought years.
A recent UMBC study finds that female researchers have led the way in bird song research, fundamentally changing our understanding of avian biology and evolution. Women made up 56% of authors and held 68% of first-author positions on papers about female bird song.
A study of 109 bird species across eastern North America over a 15-year period found that some birds are more resilient to climate change than others. The research, published in Global Change Biology, suggests that conservation efforts should target vulnerable species and locations predicted to experience extreme weather events.
A new study by Duke University researchers suggests that songbirds perform better during the day when they warm up their voices in the early morning hours. By singing early and often, birds improve their trill rate and vocal range, ultimately nailing their songs during the day.
A new study from the University of Illinois reveals a significant decline in US bird biodiversity related to neonicotinoid use, particularly affecting grassland birds. The research found a 2.2% decline in grassland bird populations for every 100 kg increase in neonicotinoid usage per county.
Researchers found that powered flight potential evolved at least three times in theropods: once in birds and twice in dromaeosaurids. This challenges the traditional view of bird origins, presenting a more complex picture of experimentation with wing-assisted locomotion.
An international study reconstructs powered flight potential in theropod dinosaurs, finding it evolved at least three times. Many ancestors of bird relatives experimented with wing-assisted locomotion before flight evolved.
A global conservation plan for parasites is proposed to recognize the value of biological diversity. Research suggests that parasites play critical ecological roles, regulating wildlife populations, and propose identifying and conserving half of world's parasites within the next decade.
Researchers used AI to distinguish individual birds based on plumage patterns, a task humans struggle with. The technique was tested on three bird species and showed promising results, opening up new possibilities for studying animal behavior in the wild.
A team of researchers found that 73 boreal bird species experienced a contraction in their breeding periods over a 43-year period, with most species starting to breed earlier and ending earlier. The study suggests that warmer temperatures may be causing this shift, allowing birds to take advantage of earlier food availability.
Scientists discovered a new species of giant pigeon in Tonga, Tongoenas burleyi, which was hunted to extinction within a century after human arrival. The bird's size and dietary habits suggest it played a crucial role in dispersing seeds for fruit-bearing trees.
Bird species at mid- to high latitudes have changed their breeding season durations over the last four decades. Climate change has influenced this shift, with some species contracting their breeding periods, typically breeding earlier and having shorter seasons.
A new study from Cornell University highlights the importance of urban green space and tree canopy for supporting diverse bird populations. The research found that increasing green space by 50% results in an 11.5% increase in annual species diversity.
Researchers found that ferrets generalize avian smells, while hedgehogs do not, which could inform strategies to protect bird colonies by saturating the area with bird smell. The study provides insights into the hunting strategies and priorities of invasive predators.
A new study has narrowed down the region of the genome that drives the black color in warblers by studying hybrid offspring. The hybrids have a mix of coloration from the parent species, allowing researchers to identify which regions of the genome are associated with which color patterns.
Ornithologists at the University of Utah found that community science bird data shows different trends in bird populations than professional surveys, especially in developing countries. The researchers hope to encourage more conscientious recording and connection between birders and professionals to fill data gaps.
A white-throated sparrow's unique two-note-ending variant has replaced the historic three-note ending across Canada, a phenomenon unprecedented in bird species. The new song's rapid spread is attributed to overwintering grounds, where juveniles may learn and adopt new song types.
Three species of pink flamingos evolved to live in shallow lakes and breed during seasonal blooms of algae and zooplankton before the inland lakes dried up due to climate change.
A study by Oregon State University found that flappers are more effective than traditional PVC spirals in reducing bird fatalities from power lines. The research suggests flappers be used as the first choice when installing bird flight diverters, with comparable materials and production costs.
Researchers found that northern bobwhites are drawn to habitats based on the presence of other birds, which could aid in conservation efforts. This phenomenon, called conspecific attraction, was studied using recordings of bobwhite songs.
Researchers found that birds consuming dietary antioxidants before and during fall migration can reduce their endocrine stress response. This reduction in stress may be a major benefit for birds, allowing them to perform better during long-distance flights.
A new study finds that wildfires change the types of songs sung by birds living in nearby forests, leading to increased local song diversity. Researchers recorded over 1,500 male Hermit Warblers and found that song dialects tend to be isolated from each other within different forest types.
Researchers trained wild hummingbirds to discriminate between UV color combinations, revealing they can see up to five nonspectral colors. The study used a custom LED tube system and recorded over 6,000 feeder visits, showing birds can distinguish between various UV+color pairs.
Researchers identified BCO2 gene as key driver of dichromatism in mosaic canaries, where males and females have strikingly different coloration. The findings provide insights into the evolution of sexually selected traits like dichromatism.
The discovery of the ancient bird figurine from Lingjing site in China sheds light on humanity's earliest three-dimensional art. The figurine, dated to approximately 13.4-13.2 ka cal BP, features a technological and stylistic profile distinct from contemporaneous Western European and Siberian representations.
A new study found that European roads are a significant threat to wildlife, with over 194 million birds and 29 million mammals killed annually. The research ranked the most vulnerable species, including the hazel grouse and russet ground squirrel, which are classified as Least Concern but face high roadkill rates.
Fossils from the Huajiying Formation in northern China reveal that the Jehol Biota appeared around 135 million years ago and lasted for approximately 15 million years. This early biota includes feathered dinosaurs, early birds, mammals, insects, and flowering plants.
A study of 175 reports found that 32.3% of North American perching birds defend their territories against other species, with hybridizing species more likely to do so. Resource competition is a key driver of territorial behavior in these birds.
Researchers found Oriental tit birds give distinct alarm calls to snakes and chipmunks, warning nestlings of snake threat but not chipmunk danger. The study suggests a specific call signals 'be aware of a snake' rather than general predator alert.
A study by Toshitaka Suzuki found that birds can visualize a snake when hearing specific alarm calls from another species. The coal tit was observed to approach the experimental area during these calls, indicating it mentally retrieves 'snake' images.
New research analyzing over 10,000 bird species reveals that wing shape adapted for long-distance flight is primarily driven by temperature variability, territory defense, and migration. This geographic pattern has significant implications for understanding biodiversity and may explain smaller geographical ranges in tropical species.
Researchers found that providing high-quality supplementary food boosts urban great tits' breeding success, with insects playing a crucial role in their development. Urban areas support fewer insects than natural habitats, leading to reduced breeding success.
A new study reveals that Sonic hedgehog plays a crucial role in establishing flight feather identity in birds, similar to how it specifies digit identities. By using chicken embryos, researchers found that Shh is required for wing development and defines a set of genes involved in this process.
A tropical treefall created a 2.5-acre gap that attracted hundreds of hummingbird species, doubling the diversity and presence of these birds in the area. The researchers documented 16 unique individuals of one species, the snowy-bellied hummingbird, within just one year after the treefall.
Bird species that exhibit novel foraging behaviors have reduced risk of extinction, according to a study published in Nature Ecology & Evolution. The researchers found that the more innovative a species is, the lower its risk of extinction, with some species able to adapt to habitat destruction by finding new food sources.
Red-winged blackbirds respond aggressively to a specific 'seet' call from yellow warblers when they detect the presence of brown-headed cowbirds. The birds also respond to other calls that signal general danger to their nests, including blue jay and cowbird chatter.
Researchers found that birds with larger brains, like crows or gulls, can thrive in cities due to their intelligence. Conversely, small-brained species like pigeons succeed through frequent breeding attempts, prioritizing future reproductive success over present survival.
Researchers found that starlings sleep five hours less per night during the summer and two hours less under full-moon nights. This study provides new insights into flexible sleep regulation in birds, highlighting the importance of natural conditions for understanding sleep patterns.