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Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Convergent Evolution

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.

Optimal Foraging

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.

Conservation of Declining Populations

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.

Short-distance Transport of Resources

Short-distance Transport of Resources

Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.

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Related Experiment Video

Updated: Mar 31, 2026

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

Published on: August 2, 2011

Global aerial flyways allow efficient travelling.

B Kranstauber^1,2, R Weinzierl^1,2, M Wikelski^1,2

¹Department for Migration and Immuno-Ecology, Max Plank Institute for Ornithology, 78315, Radolfzell, Germany.

Ecology Letters

|October 20, 2015

Summary

This summary is machine-generated.

Migratory birds may optimize flight routes by using wind patterns, significantly reducing travel time and increasing survival. This suggests natural selection favors wind-optimized migratory pathways.

Keywords:

Avian migration evolution of migratory routes global wind systems optimal route

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Published on: August 6, 2018

Area of Science:

Ornithology
Ecology
Bio-mechanics

Background:

Bird migration involves significant energetic costs and navigational challenges due to dynamic atmospheric conditions.
Understanding route optimization is crucial for comprehending migratory success and evolutionary adaptations.

Discussion:

Analysis of 21 years of wind data reveals that wind-optimized routes reduce median travel time by 26.5% compared to shortest geographical routes.
A survival model indicates that 84.8% of wind-optimized routes offer higher survival rates than shortest routes, even for fixed paths.
This implies that migratory birds, at a population level, can adapt routes for efficiency, potentially without individual wind prediction.

Key Insights:

Migratory birds demonstrate a capacity to optimize flight routes by leveraging wind patterns, leading to substantial time savings.
Route selection based on wind conditions provides a significant survival advantage, suggesting it is a target for natural selection.
Population-level adjustments in migratory routes can lead to the establishment of efficient, low-cost flyways.

Outlook:

Further research could explore the precise mechanisms by which bird populations adjust migratory routes in response to wind.
Investigating the genetic basis for adaptive route selection could reveal evolutionary drivers of migratory behavior.
Mapping global low-cost flyways can inform conservation strategies for migratory species facing environmental changes.