Animals migrate to breed , feed , mate , and various other essentials to survival . Sometimes , migrations attract predators , as with the sardine run in South Africa . Some communities , like in Pacific Grove , California , impose fines on anyone disrupting the local fauna . Comment:
Animals migrate to breed , feed , mate , and various other essentials to survival . Sometimes , migrations attract predators , as with the sardine run in South Africa . Some communities , like in Pacific Grove , California , impose fines on anyone disrupting the local fauna . Locals on Christmas Island kickback with a beer during the annual crab migration .