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1:53
This rare Persian leopard was the 5,000th entry in Joel Sartore's Photo Ark.
1:51
Scientists in New Zealand are working to save this curious-looking bird from extinction.
4:15
Joel Sartore and Tracey Dearlove go in search of a rare rowi kiwi.
2:22
Meet Alisha Sherriff, caretaker to Sirocco, a kākāpō.
3:58
Nabire passed away just days after her photo shoot with Joel Sartore.
1:36
It's hard to imagine a chameleon this small!
2:02
Watch Joel's photo shoot with this Von der Decken's sifaka.
2:12
Meet Sandra Sneckenberger, a biologist in the southeastern US.
1:28
The last Syrian brown bear was spotted in its namesake country more than 50 years ago.
0:44
This odd-looking creature was one of the first to board Joel Sartore's Photo Ark.
2:06
With fewer than 400 left in the world, Joel is lucky to photograph this fish eagle.
2:52
This brown mouse lemur is not thrilled about being in the spotlight.
