The real threat to global critical infrastructure is not enemy states or organisations but squirrels, according to one security expert.
Cris Thomas has been tracking power cuts caused by animals since 2013.
Squirrels, birds, rats and snakes have been responsible for more than 1,700 power cuts affecting nearly 5 million people, he told a security conference.
He explained that by tracking these issues, he was seeking to dispel the hype around cyber-attacks.
His Cyber Squirrel 1 project was set up to counteract what he called the “ludicrousness of cyber-war claims by people at high levels in government and industry”, he told the audience at the Shmoocon security conference in Washington.
Squirrels topped the list with 879 “attacks”, followed by:
birds - 434
snakes - 83
raccoons - 72
rats - 36
martens - 22
frogs - three