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Ultimate SwarmsIn pictures: The ultimate swarms

See George and the team chasing some of the ultimate swarms

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George amongst a bat swarm

Over 10 million female Mexican free-tailed bats fly to these caves to raise their young.

  • Cold and toxic conditions underground
  • George amongst a bat swarm
  • Big business bees in California
  • The new queen bee
  • A bee hat and cloak
  • Asian silver carp causing havoc in Illinois
  • A hazardous journey
  • Christmas Island red crabs

This gallery is from

  • Ultimate Swarms

    Zoologist and explorer George McGavin searches for the world's most spectacular swarms.

    BBC One

Gallery