Articles tagged with Bird Migration
A new study found that willow warblers' genetic make-up determines their migration patterns depending on where they breed in the summer. The researchers discovered significant differences in over 200 genes between birds breeding in southern and northern Sweden, Finland, and the Baltic States.
Researchers found that even small amounts of oil can significantly increase the energy expenditure of migratory birds during flight. The study, published in Journal of Experimental Biology, reveals that light oiling can dramatically increase the 'flight costs' of migrating birds by 20% and 45%.
Researchers are surveying vultures in Ethiopia to estimate populations and distributions, track movements, and evaluate human repercussions of vulture declines. The Bab-el-Mandeb Strait is a critical site for conservation efforts due to its large concentration of migrating birds from Eurasia and Africa.
A study found that China's wild geese are confined to degraded natural wetlands, unable to take advantage of neighboring farmland or rice paddies. Human activities such as hunting and agriculture have reduced the quality and extent of their habitats.
A growing shift in spring's onset is leaving nine songbird species unable to reach their breeding grounds, according to a study published in Scientific Reports. Climate change is triggering plants to grow earlier or later than normal, disrupting biological cycles and putting the survival of many bird species at risk.
A Duke University-led study maps the sooty tern's annual migratory path and reveals its direct correlation with hurricane-forming storms in the Atlantic. The researchers warn that stronger hurricanes may increase due to climate change, posing a new threat to these iconic seabirds.
Researchers found that barnacle geese cannot accurately anticipate climate change due to the unpredictability of polar region warming. The birds' reproductive success will be reduced if they continue to mistime their arrival at breeding grounds, despite some compensation from a longer breeding season and smarter migration strategies.
A new study found that puffin pairs that migrate close together have higher breeding success rates. Female winter foraging efforts also play a crucial role in determining pair breeding success. The study used geolocators to track the migratory movements of 12 pairs of Atlantic Puffins, revealing that pairs following similar migration r...
A Duke University-led study using satellite images shows the Sacramento Valley in California has lost nearly all its wetlands, which are crucial for millions of migratory shorebirds. The habitat loss is threatening the survival of these birds, highlighting the need for conservation efforts.
A study analyzing 24,000 blood samples from migratory and resident birds in the Americas found 79 malaria parasite lineages. The researchers discovered that prevalence varies between localities and species, with some areas having infection rates as high as 37%.
A holistic approach to understanding migratory birds' needs is crucial for their conservation, according to a study on Kirtland's warblers. The researchers used the telecoupling framework to analyze the songbirds' migration between Michigan and the Bahamas.
A study on songbird migrants reveals that temperature plays a crucial role in their migratory decisions, as milder autumns trigger restlessness and delay migration. The results have significant implications for the future of bird migration, highlighting the potential impact of changing environmental conditions.
A study led by Leonida Fusani demonstrates that the hormone ghrelin regulates migratory behavior in birds, controlling when to rest and replenish energy stores. The research team also found that an inactive form of ghrelin is a more influential factor than previously thought.
Researchers tracked three migratory bird species and found they adjust their routes to match future changes in food availability. By 2080, climate change may make it challenging for birds to find sufficient resources, posing a threat to their survival.
A study using geolocation technology tracked the 10,000-kilometer migration of Great Reed Warblers from Turkey to sub-Saharan Africa, revealing key regions of importance for the species. The research highlights the lack of protection many of these regions receive, posing a threat to bird populations.
A study of 196 bird species reveals that body size affects their migration patterns, with smaller birds traveling longer distances than larger ones. Soaring birds, such as raptors and albatrosses, have larger migration ranges independent of body size due to low energy consumption.
A global study suggests that tracking migrating birds' routes could provide early warning of potential bird flu outbreaks. Researchers found that long-distance flights of infected birds from Asia to Europe and North America via their breeding grounds in the Arctic are a key factor in spreading deadly strains of avian flu.
Research by University of Toronto scientists found that adult ruby-throated hummingbirds choose to balloon up in weight before flying south for the winter. They discovered that individual hummingbirds make decisions based on experience, with some fatten up to gain an advantage over rivals and establish territories quickly.
A study found that Blue tits' migratory behavior is driven by their need for energy and environmental information. Lean and late-migrating individuals tend to explore new environments quicker than larger birds or those with more fat reserves, suggesting that foraging may be primarily driven by energy requirements.
Researchers found that older Whooping cranes are leading the way in changing migration patterns due to climate and land use change. The birds' long-term memory and ability to learn from experience enable them to innovate new behaviors, such as shortstopping, which involves shifting wintering grounds closer to breeding grounds.
A University of Oklahoma study demonstrates that birds migrate in time with warming temperatures in spring and seasonal changes in the land's surface. The researchers found temperature to be a useful cue for migrants, but disputed the use of vegetation greenness as a cue for migration timing.
Researchers found that Manx shearwaters suffered decreased breeding success when they had to spend more time rearing chicks, leading to delayed migration and reduced resting time. This study provides insights into the consequences of carry-over effects on migratory birds' annual cycles.
Researchers created open-source, web-based visualizations of nocturnal bird migrations using weather radar networks. These new tools depict the timing, direction, and speed of bird movements at scales previously impossible to achieve.
Researchers have identified a genetic basis for songbirds' migratory routes, linking them to a small cluster of genes governing behavior. The study found that differences in migration patterns help maintain the diversity of songbirds.
A new study found that baby migratory songbirds face different risks in the nest and after leaving, with some species experiencing higher mortality rates during post-fledging stages. Researchers used radio transmitters to track young birds and documented survival rates, shedding light on factors affecting their survival.
Climate change causes red knot birds to shrink and develop shorter beaks, limiting access to high-quality food sources. This can lead to reduced survival rates among birds born in warm Arctic years, according to a 33-year study.
Researchers found that white storks rely on junk food from landfill sites for year-round sustenance, allowing them to establish resident populations. The closure of landfills may impact these birds' distribution, breeding locations, and migratory patterns.
A study published in Scientific Reports found that birds migrating greater distances have more new neurons in brain regions responsible for navigation and spatial orientation. The research team discovered a trend of increasing new neurons in line with migration distance, with different brain regions affected in two species.
Researchers used Doppler polarimetric radar data to study nocturnal migrating songbirds in Eastern North America. The study found that birds strongly compensated for wind drift near the Atlantic coast, increasing their compensation throughout the night.
Researchers found that larger-bodied birds tend to stay longer at stopover sites during fall migration, but smaller-bodied birds migrate faster in autumn. The study suggests that physical characteristics such as body size and wing size play a significant role in determining migration performance.
Research found that species with diverse migration patterns are less likely to decline, while those funneling into smaller areas are more vulnerable. Partial migrants, like Blackbirds and Robins, showed greater resilience to human impacts.
A new study reveals that just 9% of migratory birds have adequate protection across their migration cycle. Many species face declining numbers over the past 30 years, emphasizing the need for improved conservation efforts.
A new study highlights huge gaps in the conservation of migratory birds, particularly across China, India, and parts of Africa and South America. More than half of migratory bird species have suffered serious population declines over the past 30 years.
In Gipuzkoa province, bird poaching continues to pose a threat to biodiversity conservation, with dozens of birds arriving at rehabilitation centers with firearm-inflicted wounds. Researchers analyzed data from 2006 to 2013 and found that the spatial distribution of shot birds was concentrated around fixed hunting stands.
A new study shows that cuckoos use a highly complex individual decision-making process to navigate during migration. The birds can assess advantages and disadvantages of different routes, adjusting their behavior based on health, age, experience, or personality traits.
Researchers studied three species of songbirds crossing the Gulf of Mexico, finding they use weather and body fat to assess migration risk. The findings can help protect migrating birds by identifying high-quality habitats along their routes.
Researchers discovered that long-distance migrants stay longer at refueling sites and gain weight faster than short-distance birds. This information can inform conservation strategies to mitigate habitat losses and protect shorebird populations.
Researchers at the Max Planck Institute for Ornithology found that birds can save energy and time by using optimal wind conditions. They calculated global aerial flyways that allow efficient traveling, suggesting a new strategy for migratory birds to reduce travel time and increase reproductive output.
Scientists uncover European roller's migratory routes, resting areas and wintering grounds, revealing key areas of conservation importance. The study highlights the species' fragile state of conservation and the impact of human activities on its migration patterns.
A study using 21 years of global wind data found that following optimal routes reduces travel time by 26.5% and increases survival rates. This suggests migratory routes may be under strong natural selection, with potential evolutionary advantages.
Researchers found that Eurasian reed warblers use a geomagnetic map to navigate during migrations. The birds can reorient themselves towards their original destination even after being exposed to a different magnetic field.
Researchers attached geolocators to Prothonotary Warblers in Louisiana, tracking their migration patterns that spanned at least 5,000 miles across seven countries. The study provides new insights into the birds' migratory behavior and wintering locations.
Researchers from UC Davis and University of Guam studied monarch butterflies on Guam to understand their migration patterns and impact of pesticides. The study found that the lack of pesticide use on the island has led to an increase in milkweed population, which is essential for the monarchs' survival.
Researchers found a teeter-tottering climate pattern behind boreal bird irruptions, driven by boom-and-bust cycles in forest seed production. Persistent shifts in rainfall and temperature drive mass migrations of pine siskins and other species.
Researchers tracked tiny geolocators on blackpoll warbler birds to confirm their non-stop migration over the Atlantic Ocean. The journey, spanning up to 2,770 kilometers, is one of the longest recorded for a songbird.
A new study by Oxford University scientists reveals that migrating birds 'share the pain' of leading a v-formation, allowing them to take turns saving energy. The research found that individual birds spend an average of 32% of their time benefiting from flying in the updraft produced by another bird's flapping wings.
Researchers found that Dutch barnacle geese invest less energy in their immune systems, particularly resistance to general disease, compared to those breeding in the Netherlands. This allows for more energy available for reproduction and plumage changes.
A new study reveals that shorebird species employ distinct strategies to cope with raptor predation. Early-migrating species cut short their breeding seasons to minimize risk, while later-migrators do not need to shorten theirs. This complex decision process allows shorebirds to optimize their survival and reproductive success.
New research reveals that many North American bird species use looped migration routes, following the flush of green vegetation in spring and avoiding harsher winter conditions. By analyzing large datasets from eBird and satellite imagery, scientists have uncovered a general pattern common to many species.
Researchers found that short-distance migratory birds increase their flight speed in spring to reach breeding grounds first and secure resources. In contrast, long-distance migrants take a more leisurely pace in autumn as they are not under the same time pressure.
A new study by York University researchers found that juvenile songbirds, like wood thrushes, travel longer routes and take more frequent stopovers during their first migration than experienced adults. This delay may help young birds avoid intense competition for breeding sites.
A new study published in PNAS suggests that migratory birds evolved from species that lived year-round in North America. Researchers created a model to analyze the evolutionary changes of migratory bird species and found that most species originated from temperate regions before migrating to tropical areas.
A new study by University of Chicago researchers found that long-distance migration in New World birds evolved from ancestral species in North America. Contrary to previous hypotheses, the team discovered that shifts southward were more common than northward movements.
A team of researchers from York University created the first ever migratory connectivity map produced for a songbird, using tracking from both breeding and winter sites. The study reveals that wood thrushes have dual citizenship, with Canadian birds migrating to Nicaragua for the winter.
Researchers used geolocators to track songbirds' migration patterns, finding that hybrid species exhibited increased variability in their routes. This study supports the hypothesis that differences in migratory behavior can act as postmating reproductive isolating barriers.
Researchers monitored mallards' migration patterns using satellite tracking technology, revealing the crucial role of public and private wetland areas. The study underscores the need for protected wetlands to maintain healthy migratory bird populations.
A new study using geolocators on lark sparrows reveals individual migration routes and differences in pace. The birds took unique routes to Central Mexico, differing in their overall pace.
A new study found that migratory birds are responsible for spreading plant species across the Americas, with seeds trapped in their feathers offering clues to plant distribution between hemispheres. The research provides critical insight into the ecology and evolution of plants represented across both continents.
Researchers found that early migrating monarch butterflies have larger, more elongated wings with redder colors, indicating superior flight performance. These characteristics promote long-distance migration and increase the chances of survival.
Researchers used eBird citizen-science data to describe the distributions of 93 North American land birds, revealing three previously unknown migration flyways. The study provides new insights into the migratory patterns of smaller-bodied bird species.