Clocking the Flock—Makeshift
Subscribe and save 37%
off the single-issue price
menu View issues
cart 0 Issues

Herds of amateur scientists track the shifting patterns of migratory animals

— Clocking the Flock

07. Crowds Dispatches
For millennia, herds, flocks, and schools have zigzagged the planet to find food, warmth, and a cozy place to procreate. Yet the natural instincts that tell animals where to zig and when to zag remain a total mystery to humans. How do butterflies that live for just weeks know to fly north—and when to stop? And what makes a bird start gorging on worms before it migrates?

Subscribe or purchase this issue

The full version of this article is available to digital edition customers. Subscribe from only USD 18/year for full access to all articles.


With more commuters than capacity allows, Tokyo needs to maximize every square inch for their journey to work. Clad in white gloves, “train pushers” lend a hand to fill the gaps

— Tokyo, Japan

07. Crowds Observed