<p> British television naturalist David Attenborough joined Instagram on Thursday at the age of 94, quickly racking up more than one million followers in his first few hours.</p>.<p>The veteran broadcaster, who has enjoyed a stellar 60-year career chronicling the natural world for audiences, used his inaugural post on the photo- and video-sharing platform to warn "saving our planet is now a communications challenge".</p>.<p>"I am making this move and exploring this new way of communication to me because, as we all know, the world is in trouble," he said in a one-minute 12-second video message that attracted nearly 20,000 comments within six hours.</p>.<p>"Continents are on fire. Glaciers are melting. Coral reefs are dying. Fish are disappearing from our oceans. The list goes on and on," he added.</p>.<p>Attenborough joined the US social media site, which is owned by Facebook, ahead of the release of his latest film, "A Life On Our Planet", on Netflix from October 4.</p>.<p>The Instagram account will be managed by the documentary's makers and host further video messages from Attenborough in the coming weeks, they said in a message posted on the site.</p>.<p>"Join me, or as we used to say in those early days of radio, stay tuned," he added as he concluded his first and so far only post.</p>.<p>Earlier this month, he gave his starkest warning yet on the need for humanity to safeguard species from mass extinction for the sake of humankind's own survival in a one-hour film, "Extinction: The Facts".</p>.<p>It aired on the BBC in Britain in the same week as international experts warned in a report that global animal, bird and fish populations have plummeted by more than two-thirds in less than 50 years due to humans' rampant over-consumption.</p>
<p> British television naturalist David Attenborough joined Instagram on Thursday at the age of 94, quickly racking up more than one million followers in his first few hours.</p>.<p>The veteran broadcaster, who has enjoyed a stellar 60-year career chronicling the natural world for audiences, used his inaugural post on the photo- and video-sharing platform to warn "saving our planet is now a communications challenge".</p>.<p>"I am making this move and exploring this new way of communication to me because, as we all know, the world is in trouble," he said in a one-minute 12-second video message that attracted nearly 20,000 comments within six hours.</p>.<p>"Continents are on fire. Glaciers are melting. Coral reefs are dying. Fish are disappearing from our oceans. The list goes on and on," he added.</p>.<p>Attenborough joined the US social media site, which is owned by Facebook, ahead of the release of his latest film, "A Life On Our Planet", on Netflix from October 4.</p>.<p>The Instagram account will be managed by the documentary's makers and host further video messages from Attenborough in the coming weeks, they said in a message posted on the site.</p>.<p>"Join me, or as we used to say in those early days of radio, stay tuned," he added as he concluded his first and so far only post.</p>.<p>Earlier this month, he gave his starkest warning yet on the need for humanity to safeguard species from mass extinction for the sake of humankind's own survival in a one-hour film, "Extinction: The Facts".</p>.<p>It aired on the BBC in Britain in the same week as international experts warned in a report that global animal, bird and fish populations have plummeted by more than two-thirds in less than 50 years due to humans' rampant over-consumption.</p>