At least 40 percent of bird species migrate in some form. But it’s simplistic to think of these trips as only annual flights south in fall and north in spring. Migration spans a spectrum from a weeks long pilgrimage to a short meander. A bird might depart on the same day every year to a specific destination or follow irregular cycles. Most birds fly, but some walk, swim, or even stomach slide. Understanding migration means embracing a range of unique, astounding, and downright weird strategies.
The Many Styles of Bird Migration Are More Varied Than You Think
The Many Styles of Bird Migration Are More Varied Than You Think