Migration in organisms refers to the directed, typically seasonal or life-stage–dependent movement of individuals or populations between distinct geographic regions, often driven by spatiotemporal variation in resources, breeding opportunities, or environmental conditions. It is characterized by relatively long-distance, persistent movements with clear origin and destination areas, underpinned by evolved orientation and navigation mechanisms (e.g., celestial, geomagnetic, olfactory cues). Migration can be obligate or facultative, partial or complete within a population, and plays critical roles in gene flow, metapopulation dynamics, ecological connectivity, disease spread, and responses to climate and habitat change across taxa including animals, plants (via propagule movement), and microorganisms.
As married research professors at the University of Tennessee, Knoxville, Dustin Gilbert and Anne Murray often discuss their work once they get home each night. Their fields of study rarely crossover. That changed six years ...
Evolution
14 hours ago
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Birds of prey and vultures (raptors) play a vital role in ecosystems, both as top predators and key scavengers. However, compared to many other bird species, raptor populations are declining faster. This is because they need ...
Ecology
May 11, 2026
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When species are subjected to changing environments, they can survive in their current location through genetic adaptation. However, this ability is not unlimited. In a study published in PNAS, biomathematician Jitka Polechová ...
Evolution
May 11, 2026
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No matter how fast a species under threat can move, escape can only be successful if the new destination can meet its needs. An ecological modeling study from the University of California, Davis, found that 7% to 16% of global ...
Plants & Animals
May 7, 2026
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Climate change is likely to drive rodent-borne arenaviruses into parts of South America that have never faced these diseases, putting new communities of people at risk, finds a study from the University of California, Davis. ...
Ecology
May 4, 2026
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In 2025, Konstanz scientists looked very closely at rotting fruit in local orchards, and observed what no one had before—worms, hundreds of them, twisting skyward into self-assembled living structures known as "towers." It ...
Plants & Animals
May 4, 2026
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Moonlight determines when the red-necked nightjar feeds, migrates and raises its young. A groundbreaking long-term study from Lund University shows how the migratory bird's entire annual cycle follows the moon's rhythm.
Plants & Animals
May 4, 2026
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Salmon are becoming river "ghosts" as brutal droughts and violent floods cause unprecedented losses on their treacherous journey to the Pacific Ocean, scientists say. A study led by the University of Essex; NOAA Fisheries; ...
Plants & Animals
May 3, 2026
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You might know the short-tailed shearwater and sable shearwater by the common name "muttonbirds." These two species of seabird breed on islands off southeastern Australia. Both undertake a breathtaking two-week, non-stop ...
Ecology
Apr 25, 2026
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Every year a small songbird, no heavier than a letter, crosses the Sahara Desert, the Mediterranean and the Arabian Desert on its migration. New research from Lund University in Sweden now reveals how the tiny bird manages ...
Plants & Animals
Apr 23, 2026
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