Articles tagged with Birds
Brown-headed cowbirds prefer larger host nests with smaller-than-average eggs to increase their offspring's chances of survival. Researchers found that female cowbirds adjust the allocation of resources in their eggs based on perceived environmental conditions, but not host species or size variations.
Researchers found that even small amounts of bird feces can significantly impact water quality by altering nutrient conditions and microbial communities. The study suggests that bird droppings may contribute to algal blooms, but further research is needed to fully understand the effects.
A study found that male great tits choose neighbors with similar personalities, while females prefer males based on attractive qualities. This behavior may influence bird survival and social organization.
A new Cornell University study has resolved the debate on brain evolution by determining that overall brain size accounts for most differences among vertebrate species. The research found that once a species evolves a larger brain, specialized neural networks develop in brain regions controlling specific behaviors.
A team of researchers mimics the vibrant color of Stellar's jay bird plumage and demonstrates a new way to control light interaction with materials. The development could lead to engineering new materials for solar cells, camouflage, and more.
Researchers confirm importance of first arrival for promoting species diversification in a test tube experiment with bacterial species. The study extends the 'first arrival' hypothesis with caveats, suggesting that earlier arrival allows for greater diversification if competing species are similar ecologically.
New study finds that current IUCN range maps for birds endemic to India's Western Ghats are inaccurate and overestimate suitable habitat. By incorporating citizen scientist data and environmental factors, researchers have created more accurate models that flag 10 species in need of uplisting.
A study found that urban house finches are better at solving new problems than their rural counterparts due to adaptation to human presence. Rural birds who experienced high levels of human disturbance performed poorly on the problem-solving task.
Researchers have identified the neural basis for password-based species recognition in cowbirds, a behavior that resolves the paradox of species recognition in brood parasites. The study reveals that young cowbirds use a specific chatter call as a 'password' to identify conspecifics and avoid imprinting on host species.
A new study from Hokkaido University found that duet-dancing plays a crucial role in mating success among Java Sparrows, even more so than male-singing. Females often give a copulation solicitation display before males start singing.
A study published in Science found that hunting is a major threat to wildlife, particularly in tropical regions. Within 7-40 km of hunters' access points, mammal and bird populations declined by 83% and 58%, respectively. The impact of commercial hunting was higher than family food hunting, and protected areas were also affected.
A new study reveals that promiscuity in birds slows down the formation of new species, contradicting conventional wisdom. Polygamous bird species, which breed with multiple partners, are less genetically diverse than monogamous species.
Researchers found that male songbirds' ability to learn songs is positively associated with specific cognitive abilities like color reversal and spatial learning, but not overall intelligence. This contrasts with humans and other animals where cognitive abilities tend to correlate across tasks.
Research suggests that biodiversity is linked to lower infectious disease prevalence in people, contradicting concerns that intact ecosystems pose a danger. However, animal species do not present an equal threat of disease transmission, and some families like rodents transmit disease more commonly than others.
A new tyrannosaur species, Daspletosaurus horneri, has been discovered with an unusual mode of evolution called anagenesis. The research reveals a complex sensory web derived from the trigeminal nerve, similar to humans, and a lipless mask of large scales covering its face.
A new study found that birds with longer beaks have larger blind areas in front of their heads, resulting in narrower fields of binocular vision. This finding suggests that the size of the blind area plays an important role in birds' vision.
A PhD student is conducting research on the Australian night parrot, a cryptic and nocturnal species from arid Australia. Preliminary data suggests low breeding success rates, but the project aims to improve conservation efforts through studies of ecology and survival in arid landscapes.
A new species of bird, Eoconfuciusornis, has been found with exceptionally preserved soft tissues, including feathers, skin, and collagen. The discovery provides valuable insights into the evolution of flight in birds, revealing unique features such as wing patagia and plumage patterns.
The study found that Hawaii's older islands have experienced a decline in species diversity over millions of years due to shrinking land areas. The research used a new method to analyze species diversity on the different islands and concluded that most groups are now in long-term evolutionary decline.
A new study from the University of Tennessee at Knoxville shows that diversity within a wild songbird community enhances its members' access to food and increases their ability to solve problems. The research found that mixed-species groups are more effective in finding food sources and using problem-solving skills.
Researchers warn that rising temperatures in US deserts will put songbirds at greater risk of dehydration and mass die-offs. The study found that smaller species are particularly susceptible to lethal dehydration, with the lesser goldfinch facing a 25-day-per-year risk by the end of the century.
The Brazilian spider experts discovered three new species and one new genus in the study, bringing clarity to a long-standing taxonomic problem. The researchers analyzed specimens from around the world, including those deposited in museum collections, to conclude that there are only 12 species in the Avicularia genus.
Research by academics at the University of Exeter found that people living in neighborhoods with more birds, shrubs, and trees are less likely to suffer from depression, anxiety, and stress. The study also found benefits for mental health when observing birds in the afternoon.
A study found that male birds' mobbing behavior, such as dive bombing and aerial swoops, serves not only as protection against predators but also as a way to showcase their physical qualities to attract females. When females from the same species are present, males increase their participation in these displays.
A new study from Lund University and international researchers reveals that cooperative breeding of offspring is key to successful colonization in harsh environments. By sharing genes, helpers and offspring benefit from monogamous breeding females, enabling species to invade previously inaccessible areas.
A Princeton University-based study found that temperature and habitat predominantly determine the elevations where bird species live in the Himalayas. Competition limits only 12% of species, while temperature and habitat dictate 48% and 40%, respectively. The findings have significant implications for predicting how life on Earth will ...
A new study finds that small bird species in the US desert Southwest are at higher risk of lethal dehydration during heat waves, with some regions becoming uninhabitable for many species. Conservation efforts may focus on thermal refugia and water sources to mitigate this threat.
A comprehensive study published in Nature Climate Change found that nearly 700 bird and mammal species have already been impacted by climate change. The research suggests that around half of threatened mammals and 23% of threatened birds are likely to be negatively affected by future climatic changes.
A new study found that 28 of South Africa's 57 forest-dwelling bird species are declining in range, while 22 species are increasing. The data from the Southern African Bird Atlas Project indicates a link between deforestation and habitat loss, with smaller bird species more vulnerable to extinction.
Researchers found that areas with high deer numbers tend to have fewer birds that rely on forest shrubs for nesting and hunting. This is because white-tailed deer eat away at these plants, leading to a decline in songbird populations such as the Hooded Warbler and Prairie Warbler.
A new study suggests that the Ivory-billed Woodpecker may still exist, prompting a call for conservation efforts. The bird is highly elusive and its habitat is difficult to access, making it challenging to obtain conclusive photographic evidence. Researchers believe that a more pragmatic approach is needed to document the species while...
A global map of alien bird species shows that human activities are the main determinants of their presence, but also highlights areas with rich native bird species as hotspots for alien species. The study found a significant increase in bird introductions since World War II and suggests that economic factors contribute to the spread of...
A University of Illinois study found that 19 out of 20 tropical bird species in Panama may experience significantly fewer birds if conditions become drier, due to longer dry seasons and more intense seasonal droughts. The scaly-throated leaftosser is the only species that tends to increase with dryer conditions.
Research finds that urbanization is hindering the ability of certain songbird species to reproduce successfully, even after relocating. The study, published in PLOS ONE, found that forced dispersal due to suburban development can cause birds to abandon their territories and struggle to find new mates.
Researchers discovered that a dinosaur species, Limusaurus inextricabilis, lost its teeth in adolescence and did not grow another set as adults. The finding suggests a significant shift in diet from babies to adulthood, potentially explaining why birds have beaks but no teeth.
A new species of bird, Tingmiatornis arctica, has been discovered in the Canadian Arctic, dating back to approximately 90 million years ago. The fossil finds reveal a hyper-warm interval during the late Cretaceous period, with conditions allowing large birds to thrive.
A new study by the American Museum of Natural History estimates that there are approximately 18,000 bird species worldwide, nearly twice as many as previously thought. The researchers used a combination of morphology and genetic studies to highlight birds with separate evolutionary histories.
The study reveals that the square shape provides greater rigidity and higher resistance to ovalization and buckling than a hollow round shape of the same weight. This unique adaptation enables birds to fly with optimized stiffness and lightness, inspiring advanced engineering designs.
Two studies reveal that dopaminergic neurons in the brain encode errors in singing performance, helping juvenile zebra finches learn to accurately imitate their tutor's song. Meanwhile, another study finds that songbirds adjust song cadence towards an innate template, rather than learning rhythm from other birds.
Researchers at OIST uncover a neural mechanism that uses silent gaps to detect species-specific birdsong. Juvenile zebra finches learn song by mimicking adults and preferentially adopt the song of their own species despite noise and variety of birdsongs.
Researchers found hummingbirds' ability to accelerate and turn is hindered by low air density at high altitudes, affecting their performance. The study suggests climate change may impact species seeking cooler regions, including higher elevations.
A study published in Nature found that mated pairs of wild shorebirds have diverse schedules for parental care of the nest. The researchers used geolocators to track the birds' movements and timing, revealing a range of incubation bouts from every other hour to two days.
Researchers found that nine out of 11 mountain bird species shifted their lower boundaries downslope, defying expectations. The study highlights the need for caution when applying conventional expectations to species' responses to climate change.
Researchers found extreme variation in shorebird parents' nesting attendance patterns, often defying the 24-hour day-night cycle. The key underlying this variation is not starvation but rather the risk of predation.
A year-long study found that birds in leafy suburban neighborhoods fly between gardens with more vegetation than those with paved gardens or roads, visiting bird feeders more often. This knowledge can help urban planners create cities more attractive to nature and humans.
The study found that fly larvae contribute to nest sanitation, leading to heavier and larger nestlings. The presence of more fly larvae had a positive effect on nestling development, while fewer larvae resulted in smaller and lighter nestlings.
Scientists at University of Oxford discovered that ducklings have two separate memory banks for visual information, which can cause internal conflicts. The findings shed light on how birds' brains work, highlighting the differences between avian and mammalian brains.
The first evidence of Deepwater Horizon oil in a land animal has been found in Seaside Sparrows. The birds that were exposed to the oil had a different chemical signature in their tissues, indicating the oil was incorporated into their prey and feathers.
Researchers found that Goffin's cockatoos can make elongated tools of appropriate shape and length out of various materials, including larch wood, leafy beech twigs, and cardboard. The birds demonstrated problem-solving skills by anticipating tool requirements and adapting their techniques to produce functional instruments.
A new study from the University of Tennessee reveals that Brazilian free-tailed bats can reach remarkable flight speeds, challenging existing assumptions about their capabilities. The research used a novel airplane tracking method to track the bats' flight patterns, demonstrating that they adapt to wind conditions like airplanes and birds
Researchers discovered the Brazilian free-tailed bat can reach speeds of over 160 km/h, outpacing previous records held by birds. The bat's aerodynamic body shape and longer wings enabled these exceptional speeds.
Researchers at Texas A&M University have discovered three new bird species in African forests, challenging the idea of low evolutionary diversification. The study's findings highlight the importance of continued exploration and sampling to fully document avian biodiversity.
A new study using remote sensing data finds that over 200 bird species in six rapidly developing regions are at risk of extinction, despite not being included on the IUCN Red List. The analysis reveals accelerated risks of extinction for 210 species and threatened status for 189 species due to habitat loss.
Researchers found that birds in tropical climates are not more colorful than those in temperate climates. Instead, birds in harsh desert environments have evolved fancier colors to attract mates quickly. Birds in humid forest environments are darker in color overall.
Researchers at Lund University found that common swifts spend 10 months in the air, migrating and hibernating without landing. The birds' physiology is still not fully understood, but the discovery provides new insights into animal behavior.
Researchers found that experience with passing vehicles does not help birds avoid collisions, with inexperienced birds having longer flight initiation distances. Habituation to high-speed vehicles contributes to bird collisions worldwide.
Researchers found that different species can evolve the same beneficial trait through unique genetic mutations, challenging the predictability of evolutionary changes. High-altitude bird species developed red blood cells with hemoglobin proteins that bind oxygen more efficiently.
Researchers found that azure-winged magpies provided food to their group members spontaneously and without being asked, showing a high level of prosocial behavior. This suggests that cooperative breeding may have promoted the emergence of prosocial tendencies in these birds.
A genomic study by University of Nevada, Reno researchers identifies a newly discovered bird species evolving with its food source in southern Idaho. The South Hills crossbill has evolved unique dependencies on the Rocky Mountain lodgepole pine tree over 6,000 years.
Researchers found that golden eagles killed at a wind farm in California came from up to hundreds of miles away, posing a threat to global populations. The study's findings suggest that environmental assessments should consider bird populations across entire regions, not just local areas.