The Basics of Bird Migration: How, Why | 台灣之美
![The Basics of Bird Migration: How, Why](https://i.imgur.com/2P5xFLc.jpg)
2021年8月1日—Birdsmigratetomovefromareasoflowordecreasingresourcestoareasofhighorincreasingresources.Thetwoprimaryresourcesbeingsought ...
![The Basics of Bird Migration: How, Why](https://i.imgur.com/2P5xFLc.jpg)
Originally published January 2007; updated August 2021.
Geese winging their way south in wrinkled V-shaped flocks is perhaps the classic picture of migration—the annual, large-scale movement of birds between their breeding (summer) homes and their nonbreeding (winter) grounds. But geese are far from our only migratory birds. Of the more than 650 species of North American breeding birds, more than half are migratory.
Why do birds migrate?Birds migrate to move from areas of low or decreasing resources to areas of high or increasing resources. The two primary resources being sought are food and nesting locations. Here’s more about how migration evolved[1].
Birds that nest in the Northern Hemisphere tend to migrate northward in the spring to take advantage of burgeoning insect populations, budding plants and an abundance of nesting locations. As winter ...
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