Partial Migration
Embed This Widget
Add the script tag and a data attribute to embed this widget.
<script src="https://cdn.jsdelivr.net/npm/birdfyi-embed@1/dist/embed.min.js" defer></script>
<div data-birdfyi="glossary" data-slug="partial-migration"></div>Embed via iframe for maximum compatibility.
<iframe src="https://birdfyi.com/iframe/glossary/partial-migration/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://birdfyi.com/glossary/partial-migration/Add a dynamic SVG badge to your README or docs.
[](https://birdfyi.com/glossary/partial-migration/)Use the native HTML custom element.
<script src="https://cdn.jsdelivr.net/npm/birdfyi-embed@1/dist/embed.min.js" defer></script>
<birdfyi-glossary slug="partial-migration"></birdfyi-glossary>定義
A pattern where some individuals of a species migrate while others remain resident year-round.
詳細な説明
Partial migration creates complex population structures in which resident and migratory individuals coexist year-round on wintering grounds. In European Blackbirds, resident Scandinavian birds migrate while British birds typically do not. Partial migration appears to be under polygenic genetic control with environmental modification. In lean winters, residents may gain a territorial advantage by holding year-round territories; in severe winters, migrants benefit from having fled to milder conditions. The balance shifts with climate change.