here's some history on platypuses outside Australia. The first successful attempt to send any out of the country alive was by animal dealer Ellis S. Joseph in 1922. In 1910 Harry Burrell had became the first person to successfully keep platypus alive (in Australia), using a cleverly-designed "platpusary" incorporating a tank of water and artificial burrows fitted with tight rubber gaskets to squeeze the water from the platypuses' fur as they left the water. Joseph used a modified mobile version of this design to ship five male platypuses to the Bronx Zoo in New York, although only one actually survived the trip. It went on display for an hour per day for 47 days before dying.
In 1943 Winston Churchill decided he wanted six platypuses sent over to England. In the event only one (a male, named Winston) was sent, but as mentioned in earlier posts it died just before reaching its destination due to depth charges being dropped by the ship it was on.
In 1947 two female and one male platypuses were again sent to the Bronx Zoo. Supplies for the animals' voyage included 7000 frozen yabbies (freshwater crayfish), 136 000 frozen earthworms, 23 000 live earthworms, 22 000 live grubs, 45 frogs and numerous duck and hen eggs. Even so they ran out of food before journey's end and the zoo had to fly 10 000 more earthworms to meet the ship in Panama. One of the females survived less than a year. The other female stayed at the zoo until August 1957 but then escaped and disappeared. The male died a month later, after being in captivity for 10 years, 4 months and 24 days.
In 1958 another two females and one male were again dispatched to the Bronx Zoo, but all three were dead within the year. These were the last platypus to leave Australia alive, and the Bronx Zoo remains the only non-Australian zoo to ever keep the species.