Articles tagged with Migration Tracking
The Brexit referendum led to a sustained decline in EU-origin health care worker immigration to the UK, despite recruitment from non-EU countries. Policymakers should consider the impact of policy uncertainty, substitution dynamics, and global health equity when making decisions.
A field experiment on wild kittiwakes found that birds with high energy costs during breeding raised more chicks the next year, but at a cost to their own survival. The study reveals how flexible energy use can lead to hidden trade-offs in life-history strategy.
A new study analyzes geographic biases in telemetry research, finding that most studies are conducted in politically stable, English-speaking countries with high conservation funding. The research emphasizes the need for in-country capacity sharing and collaboration to ensure biodiversity hotspots are not left understudied.
Researchers developed breakthrough methods to track individual bird species during migration by combining participatory science data with weather radar technology. The BirdFlow project provides species-specific migration estimates across North America, addressing a long-standing limitation in migration monitoring.
Researchers at the International Institute for Applied Systems Analysis have built a dataset of global migration flows from 1990 to 2023, revealing a true per-capita increase in human mobility. The dataset shows that migration has become more common overall since 2000, with dips only during the financial crisis and Covid-19 pandemic.
Researchers observe Eurasian Hobbies feeding on bats in a protected wetland in Greece, highlighting the importance of local prey populations for migratory raptors. The study's findings have strong conservation implications and demonstrate the need to protect habitats and prey species.
A year-long study of NYC's East River used environmental DNA to reveal insights into urban wildlife activity, human food consumption and ecosystem health. The findings suggest that urban waterways can become continuous biosensors tracking biodiversity and habitat restoration outcomes.
A study on Spanish transhumance identifies three distinct types of systems, aligned with agroecological principles, offering insights into sustainable livestock farming. The findings highlight the need for greater political support and a regulatory framework to protect this ancient practice.
A study estimates annual mortality rates among US Immigration and Customs Enforcement (ICE) detainees between 2004 and 2026. The analysis reveals notable shifts in age and cause of death patterns over the two-decade period, providing valuable insights into the health risks faced by this population.
A new study from Florida Atlantic University challenges the narrative that rising temperatures will drive Americans away, finding that heat alone isn't driving large-scale out-migration. Instead, population shifts are shaped more by economic opportunity, housing affordability and local quality of life than climate conditions.
Researchers tracked the impact of beach nourishment on nearshore conditions and marine life, finding that prolonged turbidity can interfere with blacktip shark hunting and increase accidental encounters. The study highlights a delicate balance between coastal engineering projects and marine ecosystem protection.
Hundreds of migratory fish species are facing accelerating declines due to dam construction, habitat fragmentation, pollution, overfishing, and climate-driven ecosystem changes. The Global Assessment of Migratory Freshwater Fishes identifies 325 species needing coordinated international conservation efforts.
The Shorebird Science and Conservation Collective uses big data to inform conservation efforts by analyzing tracking data from over 3,400 individual birds. The collective brings together data from various organizations to provide actionable information for land managers and decision-makers.
Researchers develop a new technique to identify individual night-flying birds for the first time, using thermal imaging optics. The method, tested in Cape May, New Jersey, allows scientists to detect and photograph birds in flight after dark, revealing new insights into nocturnal bird migration and natural history.
A study suggests that moths integrate geomagnetic and visual cues to orient themselves during seasonal migration. The research found that visual cues are indispensable for accurate migratory orientation in the fall armyworm species.
A study predicts that climate change will shift suitable habitat for monarch butterflies southwards, disrupting their mass migration. The results show a decline in suitable habitat of between 8% and 40% by 2070, fracturing existing migrating routes.
A UT San Antonio assistant professor is studying how climate change and urbanization affect freshwater ecosystems by tracking the expansion of exotic tropical fish species into northern regions. The project aims to provide practical tools for natural resource managers to protect Texas waterways.
The study examines the characterization of the international-born health care workforce in rural US communities. It highlights the Conrad 30 waiver program, which enabled thousands of J-1 visa holders to remain in the US, caring for approximately 44 million patients, and H1-B visas as additional vehicles for immigrant clinicians.
A new study reveals Nepal's community forestry program has widened the gap between rural poverty and social elite, leaving marginalized populations behind. Researchers suggest stricter monitoring and targeted payment schemes to reform the program and promote equity.
This cohort study found that exposure to Migrant Protection Protocols was associated with higher rates of trauma during migration among asylum seekers. The Migrant Protection Protocols may have potential downstream implications for U.S. public health and security, including adverse health outcomes for asylum seekers.
The Mara wildebeest migration, once spanning over 100,000 animals, has collapsed due to fencing and human development, with most animals now living a resident lifestyle. The research team's map reveals a 90% reduction in the migration footprint since 2020, highlighting the urgent need for conservation and habitat restoration.
A new study finds Golden Eagles in Nevada at risk due to high mortality rates and habitat loss, potentially drawing in birds from other areas. Conservation efforts, such as maintaining natural habitat structure, are crucial to mitigating these impacts.
Researchers at the University of Washington successfully tracked salmon populations using airborne eDNA, finding that the airborne DNA concentration fluctuated with visual counts reported by the hatchery. The technique links air, water, and fish, providing a valuable tool for population health monitoring and management.
A new study by University of Notre Dame researcher Helge-Johannes Marahrens shows that analyzing social media posts can help experts predict when people will move during crises. Sentiment was found to be a more reliable signal for predicting forced displacement than emotion.
A University of Maryland-led study found that wild canids create and stick to specific travel routes within their territories, while felids tend to roam more freely. The research challenges traditional assumptions about animal movement and has implications for conservation and management of at-risk mammalian carnivores globally.
A new surveillance study from UNC Greensboro found a dramatic increase in Lyme disease cases in North Carolina, with blacklegged ticks expanding their range into the state. Ticks from the Blue Ridge Mountains were more likely to carry Borrelia burgdorferi, the bacteria responsible for most Lyme disease cases.
A recent study using AI and satellite images estimates that fewer than 600,000 wildebeest migrate across the Serengeti-Mara ecosystem annually, contradicting previous aerial surveys. The findings highlight the potential of satellite-based population counts for terrestrial mammals.
Research reveals a major shift in South Pacific climate conditions around 1,000 years ago, prompting people to settle further east and move away from drier conditions. The climate shift saw western areas become progressively drier while eastern areas became wetter and more attractive for colonization.
A recent study found that Arizona Bald Eagles migrate north instead of south, unlike most migratory birds in temperate zones. This adaptability allows them to take advantage of ephemeral food sources, such as spawning salmon or ungulate carcasses.
The study analyzed the northbound migration of northern fur seals, revealing that they concentrate foraging activity along continental shelf-breaks and near anticyclonic eddies. The findings provide new insights into the seals' response to oceanographic conditions and highlight the importance of long-term monitoring in understanding th...
Research shows that the 2025 Los Angeles wildfires resulted in an estimated 440 excess deaths, while the 2023 Maui wildfires led to immediate increases in suicide and overdose deaths. Higher social support was linked to improved mental health outcomes but did not buffer physiological effects.
Scientists have uncovered the remains of a vast animal community that lived in the European Arctic 75,000 years ago. The bones represent the oldest example of an animal community in the region during this warmer period of the ice age, providing valuable insights into how wildlife responded to dramatic climate shifts.
Researchers from Florida Atlantic University's Harbor Branch Oceanographic Institute have developed a multi-sensor biologging tag on the whitespotted eagle ray, enabling long attachment times and detailed data collection. The study provides insights into the rays' behavior, habitat use, and social interactions.
Researchers have developed an open-access catalog of animal traditions to explore the role of social learning in shaping animal behavior. The Animal Culture Database features vocal communications, mating displays, play, and other social behaviors observed in dozens of species from around the world.
Researchers have discovered that Bogong moths use constellations of stars and the Milky Way to navigate long distances, making them the first known invertebrate to rely on a stellar compass for navigation. The moths also use the Earth's magnetic field to maintain their direction even when clouds obscure the stars.
A global research team tracked over 100 species of marine animals, revealing key migration patterns and hotspots critical for conservation. The study, MegaMove, uses satellite data to inform a new blueprint for ocean conservation, highlighting the need for targeted mitigation efforts.
A groundbreaking NTU Singapore-led study has identified the earliest known Asian migrants who traveled over 20,000km from North Asia to South America. The GenomeAsia100K study reveals that these ancient humans arrived in the Americas approximately 14,000 years ago, diverging into four major groups and adapting to diverse environments.
The University of Queensland and Duke University scientists have developed a global map to show the migratory patterns of over 100 marine species. The MiCO database highlights critical areas and connections that transcend political boundaries, emphasizing the need for globally-aligned conservation efforts.
A study tracking 89 Northern Saw Whet Owls in Western Montana reveals stopover behavior and notable individual variation, highlighting the complexity of their migrations. The research sheds new light on the migration patterns of North America's smallest owl, with implications for conservation efforts and further studies on other owl sp...
The Dobbs decision has been linked to moderate but significant decreases in obstetrics and gynecology practitioners in the most restrictive states compared to control states. Clinician migration is likely affecting reproductive care access, quality, and equity as abortion rights are increasingly decided at the state level
Researchers found caribou migration areas decreasing significantly over 35 years, with seasonal migrations shrinking in duration and extent. Habitat loss and human-caused disturbances are correlated with these changes, posing a threat to the species' survival.
Scientists have studied common noctule bats on their spring migration across Europe, using ultra-light sensors connected 'like cell phones' to track their movements. The study reveals that bats surf storm fronts to conserve energy and migrate further, with some individuals covering over 400 kilometers in a single night.
Researchers used drone imagery to measure calf growth and maternal body condition in Hawaiʻi and Alaska, finding larger females produced larger calves. Humpback whales lose significant weight during lactation, with mothers losing nearly 214 pounds per day.
Humpback whales' reproductive success is linked to maternal characteristics and energy balance. Researchers found fetal growth rates increased with maternal length and energy demands peaked in the final third of pregnancy, coinciding with fasting and migration. This study highlights a vulnerable period for pregnant humpback whales and ...
Researchers used 16 years of radar weather data to monitor bird migration patterns from Tasmania to northern Queensland, finding millions of birds migrate each year. The study revealed unique patterns, including variation in migration direction, timing, and intensity compared to Northern Hemisphere birds.
A new genomic study reveals high genetic diversity and low inbreeding in the endangered Oriental Stork population, a common finding in many critically endangered species. The study provides hope for the species' long-term survival and suggests that protecting its habitats could rapidly rescue this species from extinction.
A new study reveals that poor winter habitat conditions in the Caribbean can lead to reduced survival rates during spring migration and the breeding season for migratory songbirds. Climate change is expected to further exacerbate these effects, underscoring the need for conservation measures to protect vulnerable species.
A new perspective paper highlights the importance of understanding migration dynamics in rural areas, which are often driven by slow changes related to climate and environment. The researchers propose integrating land system science into migration studies to develop effective sustainability policies.
A new study reconstructs the global migration history of Phytophthora infestans, challenging the common theory of its Mexican origin. The research found that P. infestans likely originated in the South American Andes and then spread globally.
Researchers have found a vast number and variety of day-flying insects migrating through the Pass of Bujaruelo in the Pyrenees, with flies making up 90% of the total. The insects begin their journeys further north in Europe and continue south into Spain.
Researchers used climate models, genetic data, and archaeological evidence to understand how environmental conditions shaped early human migration. The study found that ancestors traveled primarily through warm and humid areas with a mix of forests and open spaces for resources and shelter.
Researchers tracked migrating eagles through an active conflict zone in Ukraine, finding they used stopover sites less and made large deviations from their usual routes. This study provides the first quantitative evidence that armed conflicts can impact animal behavior.
A new study reveals how the Ukraine war affected migratory eagles' behavior, with altered routes, reduced refuelling sites usage, and longer migration times. Researchers found that the conflict events exposed the birds to artillery fire, soldiers, and displaced civilians.
Researchers attached miniature tracking devices to giant hummingbirds and discovered they migrate up to 13,000 feet in elevation, pausing for days to acclimate. The team found two distinct species of giant hummingbirds, one living year-round in the high Andes, after analyzing DNA from 154-year-old specimens.
A study led by the University of Rhode Island found that the American woodcock, a migratory shorebird, overlaps its migration and reproductive periods. The bird was found to nest multiple times during migration, with some females nesting up to six times, allowing them to reduce energy costs.
A recent study suggests that cultural similarity, measured through food and drink interests on Facebook, plays a significant role in predicting international migration flows. The researchers found that similarities in daily life aspects are dynamic and asymmetric measures of country similarity, adding value to traditional gravity models.
A study by researchers at the University of Wyoming and Max Planck Institute of Animal Behavior found that migrating animals refine their behavior with age, suggesting experiential learning plays a crucial role in successful migration. As young birds explore new places during migration, they gradually adopt more direct routes, resultin...
Researchers found that individual Balearic shearwaters are adapting to climate change by shifting their migratory range northwards, with a speed of 25km per year. However, this flexibility comes with constraints, as the birds have further to fly back in the autumn, and the impact on breeding success and survival is still unclear.
A large-scale ancient human gene bank analysis revealed that genetic variants increasing MS risk were introduced by sheep and cattle herders 5,000 years ago. This finding explains the North-South Gradient of MS prevalence in Europe.
Researchers found that captive-bred Egyptian vultures improved their flight skills faster than those raised in the wild. The study suggests that early life experiences have a lasting impact on animals' ability to cope with challenging periods like migration.