A recent study published in Oikos found that female birds' fertility declines less quickly when they mate with healthier, more experienced males who became first-time fathers at a younger age. This suggests that male partners play a role in how fast females pass their prime.
Male splendid fairy-wrens sing a special song after hearing a predator call, which attracts female attention and potentially leads to mating. The study found that females become more attentive to the male's song when preceded by a butcherbird call.
A new study found that female birds' fertility declines less quickly if they choose mates who became first-time fathers at a young age. This suggests that the 'history' of a male's reproductive past plays a role in his ability to care for his partner and offspring.
A study by Columbia University researchers found dramatic spatial and environmental variation in social behavior among birds globally. Environmental factors like temperature and rainfall influenced the incidence and distribution of family-living species.
Research suggests that developing biofuel from native perennials instead of corn in the Midwest's rolling grasslands would better protect threatened bird populations. The study found that bugs and birds thrive more in mixed prairie grasses than in corn, with twice as many species making their homes in grasses.
A new study predicts that the Mariana crow will go extinct in 75 years due to a low first-year survival rate of 40%. The species is critically endangered and faces threats from invasive species like feral cats and brown tree snakes.
Researchers tracked the movement of European bee-eaters using tiny radio transmitters and found they both soar and flap their wings, saving energy. The birds use as little energy when soaring as when resting, contrary to previous studies with larger species.
Researchers found that young birds with higher levels of glucocorticoid hormones tend to be more curious and proactive, but also more stressed. Stress causes a significant increase in glucocorticoids in fast nestlings compared to slow ones.
A new study shows flamingos deliberately apply pigments from their uropygial gland to their feathers for cosmetic and mating purposes. The birds modify the color of their plumage by rubbing their head on their neck, breast, and back feathers, which is more frequent during courtship displays.
A WCS study found that higher temperatures and rainfall in Argentina result in more parasitic fly larvae, leading to increased mortality and impaired growth for chicks. The researchers also found a positive correlation between climate variables and parasite loads on nestlings.
Researchers discovered that barred patterns on birds' feathers play a crucial role in sexual signaling, particularly on the front of males during face-to-face interactions. The study, published in Journal of Evolutionary Biology, provides insight into bird communication and evolution.
Researchers used a particle model to explain how birds make decisions when landing on foraging flights. The collective switching from flying to landing state overrides individual intentions, heavily influenced by bird position within the flock and perturbations.
Research using satellite telemetry found that migrating birds have a short 'window' of 5-15 days when they can disperse the H5N1 virus over 500km. Asymptomatic infection is crucial, and individual birds must fly quickly and take shortest routes to spread the disease.
Man-made features restrict birds to certain areas, leading to isolation and inbreeding. The study also explores natal dispersal, the time interval between when a bird moves from its hatching location to an area where it will breed.
Researchers studied the predatory style of Andalgalornis, a mid-sized terror bird that used its uniquely rigid skull and hooked beak to jab like a boxer. The team's simulations showed that the bird's attack-and-retreat strategy was effective in taking down prey, with well-targeted jabs delivering high stress levels.
A new study has revealed that ancient 'terror birds' like Andalgalornis used their powerful beaks and rigid skulls to attack prey with well-targeted jabs. Despite its strong vertical skull, the bird's skull was too weak from side to side, making it vulnerable to catastrophic fracture.
Researchers found that migratory birds become less capable of resisting temptation, pecking at food-giving buttons without learning to stop. The study suggests that temporal fragmentation of sleep may play a role in the loss of behavioral inhibition during migration.
Researchers have developed a non-invasive imaging tool to study the retina of live birds of prey, producing detailed images for the first time in history. The new spectral-domain optical coherence tomography (SD-OCT) system shows unprecedented three-dimensional information about the retina's layers and structure.
Scientists found that visually stimulating female Houbara bustard brooders with highly displaying male birds increased their fertility and breeding success. This led to better offspring growth rates due to increased testosterone allocation, suggesting a potential means for conserving vulnerable species.
Researchers gathered daily birding activity reports from over 1,000 ornithologists to study the spread of non-native plants. The study found that specific birds are contributing to the dispersal of certain invasive plant species through their feeding habits.
A new study published in PLoS Biology calls for the public's help in collecting bird sighting data, which is crucial for monitoring biodiversity. The researchers highlight that current data on common species is scarce, making it difficult to establish a 'biodiversity baseline', and urge citizens to record their sightings online.
A three-year study found wild birds opt for conventional food due to its higher protein content, challenging the notion that organic food is preferred. The study's findings suggest that consumers may be misled about the nutritional benefits of organic food.
Researchers at MIT and Hebrew University identified specific classes of neurons in songbirds that match those in mammalian basal ganglia. The study suggests that the same brain circuits underlie learning in both species, with implications for human biology and disorders like Parkinson's disease.
A three-year study by Newcastle University found wild garden birds prefer conventional seed to organically-grown seed due to its higher protein content. The study suggests that the nutritional benefits of organic food may not always be true, particularly for birds and mammals during winter when protein is essential.
A University of Illinois study monitored rat snakes and bird nests in fragmented forest areas, finding that rats spend more time on edges than thought, making interior nests safer. The study suggests preserving unfragmented forest habitats to conserve birds.
Researchers found that magpies exhibit 'rarer-sex disadvantage,' where sons die more when daughters are present and vice versa. This phenomenon challenges previous hypotheses on nestling mortality and suggests that parents may adjust their brood sex ratio through sex-biased mortality.
Researchers found that migratory birds have smaller brains than resident birds, contrary to the protective brain theory. The study suggests that migrating reduces energetic and cognitive costs, making brain size an adaptation for survival.
Researchers found that vaccinated birds can shed vaccine virus to infect other birds, and live vaccines do not always protect against infection from other viral strains. The use of modified live virus vaccines may be increasing the diversity of Newcastle Disease viruses circulating in wild birds.
Research on blackcap birds found that strong directional selection for lower migratory activity leads to the evolution of partial migratory populations and finally, to non-migratory birds. This reduction in migration distance saves energy and time, allowing birds to occupy better breeding territories and produce multiple broods.
A study published in the Proceedings of the National Academy of Sciences found that insect-gobbling animals increase plant growth by reducing plant-feeding insects' damage. The research solidifies birds, bats, lizards, and other similar animals' importance to ecosystem health.
A new study reveals that birds, bats, and lizards play a crucial role in maintaining forest health by controlling insect populations. By eating herbivores and their insect predators, these animals reduce plant damage by 40%, leading to a 14% increase in plant biomass.
Certain bird species prefer darkly colored fruits, which are found to have higher antioxidant levels than lighter-colored fruits. These antioxidant-rich foods may help birds combat stress and inflammation during long migrations.
A team of scientists predicts that warmer temperatures in the Arctic will create challenges for seabirds' nesting habits. The study found that increasing storm events, heavy fog, and wet snow will impact birds adapted to cold, dry summers, making them more susceptible to mortality.
Researchers at the University of Rhode Island have found that migratory birds prefer certain fruits rich in antioxidants and pigments. This study may provide insights into how humans can prevent disease through diet. The discovery highlights a potential partnership between plants and birds, where berries are eaten and seeds are dispersed.
Scientists have identified a new phenomenon called cell autonomous sex identity (CASI) that explains why some birds appear male on one side and female on the other. This discovery sheds light on the sexual development of birds and may have implications for behavior, disease susceptibility, and poultry production.
Researchers discovered a magnetometer system in the upper beak of birds, composed of over 500 dendrites that encode the magnetic field information. This system helps birds create a magnetic map for spatial orientation, contradicting previous myths about iron-based magnetoreception.
Researchers found that fat garden warblers, like those studied in Italy, take significantly shorter breaks during migration. They typically move on by nightfall, while thin birds wait for nearly two days to replenish their fat reserves. This study highlights the importance of ecologically-intact resting grounds for migratory birds.
Researchers mapped chicken retinas, discovering a complex pattern of color receptors that maximizes their ability to see colors. This superior vision may help birds find mates and feed on colorful fruit, and could lead to insights into treating human genetic disorders.
A new analysis of a fossil specimen called microraptor suggests that small, feathered species must have been gliders that came down from trees. The research supports the idea that some species believed to be dinosaurs may have descended from birds.
A GW research team has discovered a new species of dinosaur, Haplocheirus sollers, that links to bird evolution. The Late Jurassic fossil, found in China, shows early evolutionary stages in bird-like dinosaurs.
Scientists tested 2009 and 1918 H1N1 virus strains on chickens and ducks without causing disease or symptoms. The results suggest that birds played no role in the spread of these pandemic viruses.
Galapagos finches develop antibodies against two parasites that invaded the islands, suggesting they can fight off alien invaders. The immune system recognizes these parasites and produces specific antibodies, which may help the birds resist the threats.
Researchers at UC Davis studied birds' alarm calls to determine their purpose. The findings suggest that these vocalizations serve both to alert other birds to danger and to warn off predators.
Researchers found that feeding birds can lead to the evolution of reproductive isolation, resulting in two distinct populations within a single species. This study shows that human activities can influence the evolutionary trajectories of even common bird species.
A study found that Laysan albatrosses nesting on Kure Atoll and Oahu ingested significantly different amounts of plastic, with those on Kure Atoll consuming almost ten times the amount. The birds' stomach contents revealed a wide range of plastic items, including Asian characters indicating their likely origin.
Researchers at UC Davis have identified nonanal as the dominant odor naturally produced in humans and birds that attracts Culex mosquitoes, a key step towards controlling mosquito-borne diseases. The study also found that combining nonanal with carbon dioxide increases trap captures by over 50%.
In a field study, University of Washington researchers found that juvenile song sparrows learn their repertoire by eavesdropping on singing conversations between two adult birds. This process involves tracking the birds' movements and responses to recorded bird songs played over two speakers.
A new study found that Archaeopteryx, the iconic first bird, actually grew much slower than modern birds and had more reptilian features. This challenges the long-held assumption that rapid bone growth was necessary for flight.
The study finds that Archaeopteryx grew slowly, taking 970 days to mature, similar to dinosaurs, and its bone growth rate was three times slower than living birds. This challenges the common perception of Archaeopteryx as a bird-like creature.
Introduced Japanese white-eyes are depleting food sources, causing stunted growth and higher death rates among native Hawaiian birds. This is leading to increased susceptibility to diseases like malaria and chewing lice, further threatening the already endangered species.
Researchers found that smaller migrating blackcaps lose body temperature at night during stopovers to save energy, while heavier birds drop their metabolic rates less. This helps the birds accumulate more fuel and shorten their refueling stops.
A study analyzing bird persecution in Spain over 14 years reveals a significant decline in direct attacks on wildlife. The drop in hunting activities and increased awareness among urban populations have led to an end in the 'war' against wildlife in southern Europe.
A new study by Indiana University researchers found a common link between bird flocks, breast milk, and trust, regulated by neurochemicals oxytocin and mesotocin. Blocking mesotocin in female zebra finches reduced social preferences, while administering it increased social behavior.
Migratory birds prefer smaller, protected areas over large forest patches for rest stops and food, according to a Purdue University study. Small woodlots can provide essential refuges for birds vulnerable to predators in open habitats.
A new study demonstrates that rooks can solve complex problems using tools, including raising water levels to reach a floating worm. The birds' ability to estimate the number of stones needed and adapt to different stone sizes shows remarkable intelligence.
Seabirds face an 'energetic bottleneck' in winter, struggling to find enough food to survive harsh conditions. The study suggests that the birds' high energy demands may be too much to handle, leading to catastrophic losses during the winter months.
Researchers use DNA in feathers to create tags that reveal population sizes, parentage, roosting patterns, and sex ratios. This technique allows for easier study of larger populations without capturing birds.
Researchers used a 'neurologger' device to record pigeon brain activity while flying over familiar terrain. The study found that pigeons respond to visual cues with distinct brain patterns, including high-frequency oscillations reflecting memory processing.
Research by Sievert Rohwer and colleagues reveals that maximum body size in birds is constrained by the molt process. As bird size increases, feathers wear out before they can be replaced, requiring alternative strategies to maintain aerodynamic support. This fundamental relationship ultimately limits the size of flying birds.
Researchers at Oregon State University have made a groundbreaking discovery about bird physiology, finding that birds' lung structure and musculature are critical to their flight capacity. This study suggests that birds did not descend from theropod dinosaurs but instead evolved on a parallel path.