luis coloma images - Joel Sartore

A scientist shows the deep freeze in his lab, which contains the DNA of all the frogs in their collection, a kind of frozen ark.

A scientist shows the deep freeze in his lab, which contains the DNA of all the frogs in their collection, a kind of frozen ark.

Scientists examine frogs at the captive breeding facility known as Balsa de los Sapos, or Amphibian Ark, at Quito’s Catholic University, Ecuador.

A biologist at the amphibian lab of Pontificia Universidad Catolica del Ecuador in Quito.

Three scientists examine the previous evening’s collection of amphibians in their hotel room in Limon, Ecuador.

Two scientists examine a ravine demolished by a road-widening/gravel mining project in Ecuador. The spot was once prime amphibian habitat.

A biologist at the amphibian lab of Pontificia Universidad Catolica del Ecuador in Quito.

National Geographic Photographer and Speaker