Articles tagged with Birds
The study reveals that wintering waterbirds, primarily tufted ducks and coots, deplete mussel populations by over 90% in waters up to 11m deep. This top-down effect has a significant impact on the littoral community, with mussels recovering during summer months.
A K-State professor developed a landscape-based model to assess extinction risk for migratory songbirds affected by habitat loss and fragmentation. The study found that the rate of habitat destruction, rather than its extent, may be crucial in determining extinction risk.
A study found that gene UCHL1 is consistently low in replaceable neurons, associated with increased survival and reduced neuronal death. Researchers discovered UCHL1 levels increase when birds sing, suggesting a link to improved neuron replacement.
Young canaries learn atypical songs but recast them into adult canary syntax as they mature. As they approach sexual maturity, rules interfere with the freedom of youth, leading to a reprogramming of their songs.
A research team has rediscovered the ivory-billed woodpecker in the Big Woods of eastern Arkansas, with multiple sightings and frame-by-frame analyses of brief video footage. The evidence gathered during an intensive year-long search confirms that at least one male ivory-bill still survives in vast areas of bottomland swamp forest.
Independent sightings of the ivory-billed woodpecker have been reported in eastern Arkansas, with video evidence suggesting that the bird may still exist. The birds were spotted in the region's swamps and hardwood forests, where conditions are becoming increasingly favorable for population growth.
Researchers found that whooping cranes exhibit high-amplitude head movements to control their visual world while searching for food. By holding the head still more than 50% of the time, they permit close and stable examination of objects in view, allowing accurate detection, localization, and recognition of food items.
Researchers argue that a narrow focus on just a few songbird species provides a fragmentary picture of brain function. They propose studying the diversity in how birds learn to sing across different species and age groups.
A bird IQ test, developed by Dr. Lefebvre, ranks species based on their innovative feeding behaviors observed in the wild. The study found that birds with greater behavioral flexibility and larger forebrains are more successful in new environments.
A study on young zebra finches reveals that dramatic degradation in song quality occurs after waking up from sleep, only to improve with morning rehearsal. Ultimately, better singers have poorer post-sleep deterioration of song development.
Neurobiologists studying finch brains found a crucial learning circuit that generates trial and error necessary for mastering sophisticated motor skills. The region, LMAN, tunes song variations by introducing different pitches and frequencies, allowing birds to improvise and learn.
Researchers found that male Cassin's finches sing more in response to the loss of a prospective mate, but less when females are present or infertile. The scientists conclude that males temper their efforts based on the likelihood of a payoff.
Researchers propose a new naming system for bird neurosystems, revealing similarities to mammalian brains. The revised nomenclature reflects recent discoveries in neural processing and behavior, highlighting the cognitive abilities of birds comparable to those of mammals.
A new avian species called Vegavis iaai has provided unprecedented fossil proof that some close cousins to living bird species coexisted with dinosaurs during the Cretaceous period. The research, published in Nature, places Vegavis within the Anseriformes group and indicates its evolutionary relationship to ducks and geese.
A groundbreaking study reveals a new type of ecosystem born from the intersection of nature and city life. The Phoenix urban ecosystem is characterized by higher abundance of plants and animals due to consistent access to water resources.
Researchers at Rockefeller University found that zebra finches use infant-like strategies to learn their song, with two distinct approaches: repetition and motif. These findings suggest a remarkable parallel between vocal learning in birds and human language acquisition.
A new study predicts that up to 14% of all bird species will be extinct by 2100, leading to a decline in forest ecosystems and agriculture worldwide. This dramatic loss may also encourage the spread of human diseases and negatively impact ecosystem processes such as decomposition, pollination, and seed dispersal.
Researchers taught baby sparrows to sing a complete song using overlapping segments, revealing that memories are stored as distinct phrases. This study provides insights into the physiological basis of language learning in birds and may inform understanding of speech development in humans.
A study led by Duke University researchers found that species tolerating secondary habitats are not more resilient to deforestation than those dependent on primary forests. The study suggests that all bird species in the region face equal threats from habitat loss, regardless of their adaptability.
Researchers found that tropical birds are more susceptible to global warming due to their sensitivity to environmental cues, which can disrupt the timing of breeding. The study suggests that changes in rainfall, temperature, or food availability may drive breeding behavior in these birds.
Researchers found that bird abundance and reproductive success are often disconnected, with some species adapting to human disturbances and others facing declines. The study suggests that using bird counts alone may not accurately reflect habitat quality.
The four-year project aims to produce new techniques for analyzing spatio-temporal data, making it accessible to researchers, conservation biologists, educators, and citizens. The grant will integrate machine learning and modeling techniques with existing ornithology projects, increasing the power and scope of data tools.
Researchers discover two distinct COI barcodes in each of four species: solitary sandpiper, eastern meadowlark, marsh wren and warbling vireo. The findings indicate that these species should be split, confirming suspicions among taxonomists.
Research suggests that higher levels of testosterone and dihydrotestosterone hormones give male Townsend's warblers a competitive advantage over female hermit warblers. The findings indicate that the hermit warbler may become extinct in another 5,000 years due to habitat loss and competition for resources.
Researchers found that as rural forests are developed, native bird species face risks due to habitat loss and increased predation. The study suggests that housing density is a key driver of these changes, with some birds benefiting from human activities like feeding stations and nesting boxes.
A Queen's biologist calls for immediate protection for two distinct rock ptarmigan populations in Newfoundland and Alaska, citing genetic differences and threats from human activities. The study's findings suggest that these populations should be considered separate species, deserving special preservation under the Species at Risk Act.
Researchers discovered that migrating birds sleep less during migration periods and still perform normally. However, they experience impaired performance when not migrating, similar to humans with sleep disorders. The study provides an intriguing model for studying mechanisms of seasonal mood disorders.
A new study finds that nocturnally migrating songbirds skimp on sleep without suffering negative effects, unlike other animals. By studying captive white-crowned sparrows over a year, researchers found the birds' brains showed no signs of sleep deprivation during migration periods.
A recent analysis of 11,633 species published in Nature found that more than 300 critically endangered species are completely unprotected. The study emphasizes the need for a major shift in conservation strategies to prevent large-scale species extinctions over the next few decades.
Researchers found FoxP2 gene expressed in brain regions critical for song learning, similar to human brain. The study suggests that variations in the FoxP2 gene may have contributed to the development of language in humans.
Scientists have identified a key gene, FoxP2, that enables vocal learning in birds, which is similar to human language production. The researchers found that the gene is expressed in areas of the brain responsible for song production and learning, and its expression levels increase during times of song learning.
A UCLA study finds that FoxP1 and FoxP2 genes shared by humans and songbirds may play a critical role in human speech and speech disorders. The study suggests that understanding these genes could lead to new medications for speech disorders.
The research highlights the alarming rate of extinction among birds, with many species experiencing significant declines in population numbers. The study's findings suggest that birds are excellent indicators of global extinction rates, and their decline serves as a warning sign for the planet's overall health.
Researchers found that tropical boubous sing the 'victory duet' more often after an invasion attempt than before or during playback of recordings. This rare context-specific birdsong is used to assert dominance and deter other birds from intruding into their territory.
The cerulean warbler's population decline is attributed to habitat loss and fragmentation in both breeding and winter ranges. An international collaboration, the Cerulean Warbler Technical Group, aims to develop a proactive conservation strategy through sound science and partnerships.
Researchers found that small lice stick to small birds and big lice prefer big birds due to the optimal hiding space between individual 'barbs' in their feathers. The study suggests that size matters for parasites, with larger hosts supporting larger louse species.
Researchers have discovered that three species of cassowaries can produce low-frequency sounds that may be similar to those made by dinosaurs. The birds' helmet-like casques are thought to serve a function in sound reception and could provide clues about dinosaur communication.
A new study analyzing 11,000 mammal, amphibian and bird species reveals major gaps in the global protected area system, placing over 700 species at risk of extinction. The analysis highlights urgent conservation priorities for tropical areas, islands, and specific endangered species.
Researchers found that specific cells in the bird's brain become 'tuned' to what the bird is learning, responding strongly to familiar songs and motifs. The study suggests that experience modifies the brain to highlight important motifs, allowing birds to recognize individual songs.
A study by Kenneth Schmidt found that Illinois raccoon populations coincide with declines in low-nesting songbirds, with over 70% of these species dropping from the state's bird list. Raccoon habitat expansion and loss of top carnivores contribute to this decline.
New research links bright beak colors to healthier immune systems in male birds, with carotenoids playing a key role in conveying individual health. The studies provide the first direct evidence that males' flashy features accurately indicate their fitness.
Researchers found that removing cows from riparian habitats in the arid southwest increased vegetation density by 4-6 times and boosted bird populations, including species of special concern. The study suggests that restoring these areas can have profound benefits for breeding birds in the region.
Researchers found that Northwestern crows use passive strategies when stealing from relatives and become aggressive when targeting non-relatives. The study, led by Renee Ha and James Ha, observed 55 birds over 2.5 years and found that kinship significantly affects crow behavior.
A new study suggests that the brain's language centers may be identified using the genetic expression of certain brain receptors in vocal-learning birds and mammals. The research, led by neurobiologist Erich D. Jarvis, reveals a highly specialized pattern in the genetic expression of these receptors in songbirds capable of vocal learning.
Researchers found that female Mexican Spotted Owls spent 60% less time on prey-handling activities with high hiking intensity. The study recommends protecting owl habitat during the nesting season by limiting hiking or establishing buffers around nest sites.
Scientists have discovered that ancient birds used a unique 'wing-assisted incline running' behavior to help them climb vertical surfaces, which may be the key to explaining how dinosaurs learned to fly. This behavior, found in modern-day birds, involves rapid movement of the front appendages to gain foot traction as it climbs.
A comparative study of plants and birds on oceanic islands found that invasive species outnumber native species, causing extinctions but increasing overall diversity. The total number of land bird species has remained relatively unchanged despite the loss of native species.
Forest thinning may improve plant diversity and support animal habitats if done correctly, according to USGS-funded research. The study found that selective thinning of dense young forests can promote the growth of hardwoods, large trees, and old-growth characteristics.
A report highlights that protecting threatened and endemic species does not automatically ensure compliance with biodiversity conservation laws. The study found that this approach falls short in preserving other bird species, especially in their habitats of distribution.
Cornell University's Macaulay Library has gained access to digital sound recordings and high-definition video clips, enabling researchers, conservationists, and citizen-scientists to support ornithology projects. The new system provides streaming capabilities for sounds and video over the Internet and maintains all digital assets.
A recent study by Kansas State University researchers found that birds cheat on their mates to avoid inbreeding and increase genetic diversity. In a collaborative study of three shore bird species, the team discovered that infidelity rates are significantly lower than those observed in songbirds.
An international team of scientists found that birds use alternative reproductive behaviors to avoid inbreeding depression when mates are genetically similar. Extra-pair paternity and quasi-parasitism occur at low frequencies, but more importantly, extra-pair parentage occurs when parents are more related to each other.
Researchers found that neighborhoods with higher socioeconomic status have more diverse bird populations, while lower-income areas tend to have fewer birds. The study analyzed data from 15 Phoenix-area community parks and suggests that socioeconomic factors play a significant role in shaping the local bird population.
Woodpecker finches rely on tool use to extract food from bark and tree-holes in scarce environments, outperforming conventional foraging techniques. This unique adaptation allows them to acquire larger, high-energy prey.
The LSU Museum of Natural Science is part of a $4 million grant to compare DNA sequences of 500 bird species. The goal is to understand the history of avian diversity and reconstruct the evolution of bird behavior, morphology, and ecology.
Acid rain is harming wood thrush populations, with declines of up to 5% annually in regions with high acidity. The decline may be related to leaching of calcium from the soil, affecting food availability and breeding success.
A study of 15 community parks found that bird diversity and abundance are linked to neighborhood income, not park size or vegetation. However, the correlation between trees and bird populations is weak, suggesting other factors, such as cat populations or urban planning, may be at play.
A study by Duke University scientists found that excess plant-eating monkeys on small islands spur extra tree growth, boosting insect populations that attract birds. The density of birds is strongly correlated with the density of howler monkeys.
Researchers at the University of Michigan found that low-density exurban development increased by 2000 to occupy nearly 10 times the area of urbanized land, while agricultural land use decreased in some areas. Special planning can help minimize environmental impact through designs that deliver public benefits like clean water and nativ...
Illicit crops, particularly opium poppies, are expanding into critical bird habitats in the Andes region of Colombia. This could lead to devastating effects on forest-dependent bird species if the expansion continues.