He has been besieged by birds, had 120m crabs try to crawl up his trouser leg and stayed cool beside an erupting Icelandic volcano. As David Attenborough turns 100, we celebrate his most extraordinary adventures

Un'icona vivente. (ANSA)

People often ask who might replace the nature broadcaster, who turns 100 this week. The truth is that he’s irreplaceable, but a wide range of voices are attempting to fill his…