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Joel is the founder of the Photo Ark, a groundbreaking effort to document species before they disappear—and to get people to care while there’s still time.

Explore the Photo Ark

Search the 34,681-picture Photo Ark for an animal or species. Scroll down to see every species in the Ark … if you’ve got all day.

  • 10000 species in Photo Ark as of today
    Explore the Photo Ark Search the [photoark_count]-picture Photo Ark for an animal or species.
  • 25 years to document every species in human care
    Red-eyed tree frog (Agalychnis callidryas) at the Miller Park Zoo. These frogs sit completely still all day long and blend in with the surrounding leaves. They have the ability to change the green tint of their skin to make it harder for predators to see them.