Wired points out that squirrel espionage -- Sky News reports 14 squirrels were kitted out with lisetneing devices, according to Iran's official Islamic Republic News Agency -- would of course not be without precedent. Other members of the animal kingdom have been tagged as possible spies, including pigeons. During the Second World War, the Allied Forces used pigeons to fly vital intelligence out of occupied France.
Cats have also been used as spies and US marines stationed in Kuwait recently used chickens as a low-tech chemical detection system.
A UK Foreign Officer source reportedly told Sky News: "The story is nuts."