There are 49 million kangaroos in Australia. There are 3.5 million people in Uruguay. If the kangaroos were to attack Uruguay each person would have to fight 14 kangaroos.
It depends how the kangaroos get to Uruguay. Say there are twenty scheduled flights per day x 300 kangaroos per flight, that's only 6000 kangaroos per day. If the Uruguayans lie in wait at the airport, every kangaroo will have to fight 583 Uruguayans. If I was a kangaroo I wouldnt fancy those odds.
