Articles tagged with Birds
A recent survey conducted at the University of California, Berkeley, found 48 distinct bird species within a 84-acre area, surpassing previous records from 1913 and 1938. The study suggests that urban green spaces can serve as islands of diversity, supporting a wide range of bird species.
Researchers from the Zoological Society of London identified the factors influencing the success of malaria parasites in New Zealand bird species, including two previously unknown strains. The study's findings provide insights into the traits that enable parasites to survive and thrive in new environments.
A new study reveals that restoring floodplain forests helps migratory songbirds survive the winter, providing vital habitat for birds from Alaska and Canada. The research also found that restored forests are equally preferred to existing older forests by some species, including Lincoln's and White-crowned Sparrows.
A new study reveals that baby songbirds learn and repeat the clearest versions of songs they hear, influenced by noise from nature and humans. This cultural selection process can lead to lasting changes in a species' top tunes, highlighting the impact of anthropogenic factors on bird communication.
Researchers at Oregon State University have developed an AI-powered system to monitor bird sounds, identifying species and changes in habitat loss or climate change. The technology uses a multi-instance machine learning approach, allowing for efficient ecological monitoring, and can be applied to other forest noises and animal species.
Researchers found that introduced white-eye birds outcompeted native Hawaiian species for food and resources, leading to stunted growth and feather replacement issues. This threatens the long-term survival of these endangered bird species, which are considered 'conservation reliant' in Hawaii.
Studies by University of Gothenburg researcher Daniel Gustafsson reveal that body lice can spread more easily than wing lice, defying expectations. Genetic data shows that almost identical body lice are found on most sandpipers worldwide, highlighting the importance of migration patterns and host bird size.
Brown-headed cowbird females are attracted to less intense wing spreading, feather puffing, and bowing during a display. This study reveals the opposite of what was previously predicted by sexual selection theory. The researchers used audiovisual recordings to investigate the female's response to male displays.
Researchers tracked changes in birdsong over time and found a strong link between the shift and increasing urban noise. Birds changed their tune to be heard above the cacophony of car horns and engine rumbles, with one dialect dominating the city's song repertoire.
Researchers found that deafening causes rapid changes to motor areas in songbirds' brains, predicting which birds will have worse songs. This study may provide insights into how hearing loss affects the human brain's vocalization control.
A new study by UCLA scientists has discovered that over 2,000 genes in the brain of zebra finches are significantly linked to singing. These genes, which include FoxP2 and reelin, may also play a critical role in human speech and speech disorders such as stuttering and autism.
A study analyzing eBird data finds that rising temperatures are altering bird migration patterns, pushing birds to arrive earlier in the year. This could negatively impact bird populations, especially slow migrators, as they may struggle to adapt to changing conditions and face increased competition for resources.
Researchers discovered that urban birds' songs are altered by city structures, which reflect and distort noise, affecting their ability to communicate effectively. This study, published in PLOS ONE, challenges the previous assumption that birds sing louder to drown out noise.
A team of researchers found a crucial connection between genetic variation and geographic distances in Florida Scrub-Jays. Maintaining or restoring networked scrub-oak habitats within 2-3 miles is essential for sustaining genetic diversity and promoting the species' long-term survival.
Researchers found that birds in changeable climates are more prone to infidelity and divorce. This may be because unpredictable weather conditions make it harder for birds to predict the environment during breeding season, leading them to seek new partners for increased genetic diversity.
Researchers found that older male white-crowned sparrows don't react strongly to young males singing in their territory, indicating they consider them less of a threat. In contrast, younger males within the same age group respond aggressively when hearing each other's songs.
A Duke University-led study finds that 80% of high-endemicity areas in the Andes lack protection, with hundreds of rare species under threat from human activities. The research highlights the urgent need for conservation strategies to protect this unique region.
Researchers found that birds prioritize specific tree species over others when searching for caterpillars, with the healthiest trees harboring the most caterpillars. This preference puts caterpillars at a higher risk of predation.
Researchers from the University of Hawaii at Manoa report that native forest birds are experiencing prolonged molting periods due to increased competition with introduced Japanese white-eye birds. This change in molt timing and duration is associated with food scarcity and has significant implications for bird survival and growth.
A USGS study found that climate-driven changes in elk behavior are causing cascading effects on plant and bird communities in mountainous Arizona. Elk's increased ability to browse on plants during winter is leading to decreased tree populations and habitat quality for songbirds.
Research in songbirds reveals glial cells and synapses can produce estrogen, a hormone linked to neurodegenerative diseases. This discovery could provide new insights into the prevention and treatment of conditions like Alzheimer's and Parkinson's.
In a study published in the Proceedings of the National Academy of Sciences, researchers found that individual monkeys who avoid conflicts prevent large groups from achieving their competitive potential. By defecting, members of larger groups can gain an advantage when defending their territory but not when invading others.
A new study by Duke University researchers has found that tropical birds are moving to higher elevations in response to climate change, but at a slower rate than predicted. The animals appear to be tracking changes in vegetation rather than migrating rapidly, suggesting a delay in their response to warming temperatures.
Researchers observed ravens using deictic gestures in the wild, such as pointing and holding up objects to test interest or strengthen bonds. This study suggests that complex communication systems may be more widespread than previously thought.
Scientists used 700- to 1,100-year-old Hawaiian ibis feathers to confirm the bird's classification as a close relative of the American white ibis and scarlet ibis. The plumage coloration revealed the bird was brown-black to ivory-beige, providing new insights into prehistorically extinct Hawaiian birds.
A growing body of evidence shows that man-made noise is bad for birds, particularly bigger birds with low-frequency songs. These species may be forced out of noisy sites because they can't hear each other over the din.
Researchers found that older male nightingales matched songs less often and overlapped songs more frequently with younger birds. This suggests a different strategy than previously thought, where older males may 'show off' to protect their territories by adding new songs to their repertoire.
Research suggests climate change is increasing avian malaria and other mosquito-borne diseases in Hawaiian forests, threatening the survival of endemic bird species. Native birds have adapted to these changes by developing tolerance to malaria, allowing them to expand their ranges into previously inhospitable areas.
A study led by Johns Hopkins behavioral neuroscientist Eric Fortune found that the brain prefers cooperative activity over solo ones, as demonstrated in plain-tailed wrens' duet songs. The research has implications for programming autonomous robots and understanding human social behavior.
Researchers found that birds' wings have grown longer and bodies are increasing in mass over the last 27 to 40 years in central California. Climate change is believed to be behind the trend, which challenges the usual thinking about climate change and body size.
A 1956 film shot by a dentist from Pennsylvania captures the last confirmed sighting of an imperial woodpecker in the wild. The footage shows a female bird foraging and then taking flight, offering insights into the species' behavior before its extinction.
Researchers found a strong relationship between testosterone levels and the size/intensity of the black throat patch in female barred buttonquails. High testosterone levels correlate with more intense plumage coloration and better body condition, suggesting a reversed hormone dependency in sex role behaviors.
Researchers have determined the evolutionary family tree for the Hawaiian honeycreeper bird family, revealing they evolved from Eurasian rosefinches. The study used genetic data from 28 bird species to identify the ancestors of the 19 remaining species, which are facing significant extinction threats.
Research reveals that West Nile virus transmission is highest in urbanized and agricultural areas, with the American robin playing a key role as a 'super-spreader'. Mosquito species that feed on robins are more important in transmission than other birds.
Research finds West Nile virus transmission is highest in urbanized and agricultural habitats, with robins and specific mosquito species playing a crucial role. The virus has had an impact on human health, particularly due to its ability to target abundant bird species.
Researchers found that individual birds varied their technique and dropped blades of grass less often as they gained experience. The study suggests that birds have the mental capacity to learn and develop skills through repetition.
A study by Cornell University researchers found that songbirds' ability to learn and remember songs is linked to the size and proportion of their brain regions. The research suggests that species with larger higher brain areas relative to lower areas can learn dozens or hundreds of different notes.
Researchers identify cause of hummingbird courtship sounds: fluttering tail feathers generate louder sound when neighboring feathers flutter at the same frequency. The unique sound is thought to be a form of aerodynamic signaling during courtship.
A team of Indiana University researchers has discovered that promiscuous female birds have higher reproductive success due to a genetic 'trade-up', resulting in more offspring. By studying dark-eyed juncos, the study found that females who mate outside their social pair have twice as many grandchildren than those who remain truly monog...
Researchers found that male rock ptarmigans can run up to 50% faster than females due to superior physiology, enabling them to defend larger territories and successfully breed. This study highlights the importance of considering physiological factors in understanding animal behavior and breeding success.
Researchers at Michigan State University discovered that male songbirds use scent to attract both female and male mates through the 'Axe effect'. Female birds preferred the odor of smaller males, while larger males overcompensate with greater amounts of an attractive scent.
A Baylor University study reveals that some desert bird species are more resilient to wildfires and climate change due to changes in their habitat. The research found that three bird species will benefit from the drying of grasslands, reducing the likelihood of intense wildfires, and allowing for easier prey foraging.
Researchers found burrowing parrots originated in Chile and successfully crossed the Andes on a single occasion over 120,000 years ago. This species expansion is significant for conservation actions, as it shows how animal species overcome natural barriers to find suitable habitats.
Researchers found a rare case of non-parental infanticide in the black-billed magpie, where an adult bird attacked and killed nestlings. The suspected perpetrator was a female parent from a neighboring nest, due to aggressive interactions and territorial expansion.
Researchers found that Hawai'i hosts three limpet species, 'opihi makai', 'alinalina' and 'ko'ele, which speciated within the archipelago along an ecological gradient. These findings reset the bar for marine speciation in Hawai'i.
Researchers discovered that microRNA levels increase or decrease in the zebra finch brain after hearing a new song. This finding suggests that microRNAs play a regulatory role in fine-tuning the brain's response to social information.
Researchers analyzed over 345,000 bird capture records to assess the risk of injury or mortality from mist netting. Frequently captured birds were found to be less at risk than those captured infrequently due to established adulthood and territory ownership.
Researchers tracked bird populations over 25 years in isolated forest fragments and found that many species returned after being thought extinct. The study suggests that local extinction is accompanied by continual recolonization, dependent on habitat size.
Ovenbirds and veeries use chipmunk calls to identify safe nesting spots, avoiding areas with high predator activity. By eavesdropping on chipmunk vocalisations, birds can select optimal locations for their nests, reducing the risk of predation.
Researchers at Yale and Cambridge found that birds' plumage colors only represent a fraction of the colors they're capable of seeing, thanks to additional UV-sensitive cones. The study suggests that structural colors produce most of the color diversity in bird feathers, with limitations preventing them from creating certain colors.
A new study reveals that bird plumage coloration falls short of filling the colour space, leaving vast regions unoccupied. Despite having an additional color cone sensitive to ultraviolet light, birds can only produce a subset of colors theoretically visible to other birds.
A UBC study found that over 75% of tree holes used by birds and mammals worldwide are created by damage and decay, emphasizing the importance of preserving older, larger trees. This contrasts with North American forests where woodpeckers dominate hole creation.
Researchers found that female zebra finches inherit the disposition for infidelity from their fathers, who had also engaged in promiscuity. This genetic predisposition increases the likelihood of extra-pair matings, despite costs for females.
A new study found that the sex differences in the brains of songbirds vary according to their social status. Contrary to previous assumptions, dominant males' larger brain areas controlling song behaviour do not explain their dominance. Instead, gene activity and neural connections play a more significant role
A new forest simulation model helps researchers understand the effects of timber-friendly hardwood regeneration on songbird habitats in Michigan's Upper Peninsula. The study found that regeneration in harvest gaps is crucial for forest managers to have choices, with sugar maple regeneration having a significant impact on bird habitat.
Researchers tracked six bird species to estimate seed dispersal distances and found that only one species ingested seeds. The study suggests that long-distance dispersal is critical for plants to establish new populations, and humans may need to create stepping-stone vegetation or forest corridors between fragmented habitats.
A new University of Florida study reveals that cats are the dominant predators to urban mockingbird eggs and nestlings, challenging assumptions about urban areas as nesting sites. The study urges pet owners to keep felines indoors at night to reduce nest predation.
The article reports on audio recordings of the Ivory-billed Woodpecker captured by Dr. Michael Collins, which match historical descriptions. The footage shows characteristics consistent with the species, including a large crest and rared-back posture.
Researchers found that radiation exposure led to population declines in birds with orangish plumage, as the pigment pheomelanin consumes antioxidants and diminishes their ability to combat oxidative stress. In contrast, some species with different melanin-based coloration showed positive effects from radiation.
A new model of island ecology suggests that most unique island species should be common on their island, contradicting the common perception of rarity. The researchers used data from 35 islands and archipelagos to develop the model, which predicts how many individuals of each species can be expected to see in their natural habitat.