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"The riskiest group activity of all is warfare, and few animals other than humans and monkeys engage in it."

• bootload 10y ago
  "... few animals other than humans and monkeys engage in it" Birds, ants, killer-whales are but a few I can immediately think of.
  • deleted 10y ago
    [deleted]
  • reddytowns 10y ago
    Birds? I don't think so.
  • daemin 10y ago
    There's fighting to survive against a predator, there's fighting competitors for mating access, and then there's fighting between groups of the same animals. They mean that it's the third option that is rare among animals.
    • bootload 10y ago
      "then there's fighting between groups of the same animals." have you not seen same animals fighting in groups against each other? Take your point though.