Following the trail of a helicopter overhead, a massive herd of walkers begins to form and migrates from the city to the countryside.
Amidst the pits, a herd migrates north.
My guess is that this herd is migrating.
Birds, fish, and herds of animals migrated hundreds or thousands of kilometers-farther than any prion could teleport.
The northern herd migrates west into southwestern Montana in the winter.
A routine salt mission: the great herds were migrating, and the smell was worse than the memory of it.
Before 1870, herds of several 100,000 bison (buffalo) periodically migrated across the Platte in following seasonal pasture.
Five years pass, and a herd of Diplodocus are migrating across the prehistoric salt lake.
It turned out that the main surviving herd of northern right whales migrates along the East Coast.
When the North Sea was an ice age tundra, vast herds of animals migrated to the UK.