Iranian workers deliver one of two Siber

Iranian workers deliver one of two Siberian tigers, sent by Russia in a swap deal with Iran in which Moscow has procured two Persian leopards, at Tehran's Eram Zoo on April 23, 2010. The official IRNA news agency reported on April 24, 2010 that the swap was agreed earlier this year during a visit of Russian Natural Resources Minister Yury Trutneve to Tehran. The head of Iran's environmental body, Mohammad Javad Mohammadizadeh, said the two animals will remain under observation at the Zoo for nearly a month, and then be taken to a habitat in the northern Mazandaran province. AFP PHOTO/STR (Photo credit should read -/AFP via Getty Images)