Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Keyword: tadpole

Photo: A torrent frog tadpole (Telmatobius hintoni) at Museo De Historia Natural "Alcide d'Orbigny". This species is listed as vulnerable on the IUCN Red List.

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A torrent frog tadpole (Telmatobius hintoni) at Museo De Historia Natural “Alcide d’Orbigny”. This species is listed as vulnerable on the IUCN Red List.

Photo: A torrent frog tadpole (Telmatobius hintoni) at Museo De Historia Natural "Alcide d'Orbigny". This species is listed as vulnerable on the IUCN Red List.

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ANI110-00249

A torrent frog tadpole (Telmatobius hintoni) at Museo De Historia Natural “Alcide d’Orbigny”. This species is listed as vulnerable on the IUCN Red List.

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

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ANI078-00338

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

Marbled newt larvae (Triturus marmoratus) at Conservation Fisheries. These animals are common in Europe, esp. France. These individuals were brought in as eggs from a North American breeder.

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Marbled newt larvae (Triturus marmoratus) at Conservation Fisheries. These animals are common in Europe, esp. France. These individuals were brought in as eggs from a North American breeder.

Picture of a three-month old tadpole of a Diablito (Oophaga sylvatica) San Lorenzo, Ecuador locality, from a private collection.

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Three-month old tadpole of a Diablito (Oophaga sylvatica) San Lorenzo, Ecuador locality, from a private collection.

Hourglass treefrog tadpoles (Dendropsophus or Hyla ebracatta) that are a month old at Henry Vilas Zoo in Madison, WI.

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Hourglass treefrog tadpoles (Dendropsophus or Hyla ebracatta) that are a month old at Henry Vilas Zoo in Madison, WI.

Hourglass treefrog tadpoles (Dendropsophus or Hyla ebracatta) that are a month old at Henry Vilas Zoo in Madison, WI.

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Hourglass treefrog tadpoles (Dendropsophus or Hyla ebracatta) that are a month old at Henry Vilas Zoo in Madison, WI.

Photo: An endangered mint morph of the terrible poison dart frog (Phyllobates terriblis) from a private collection.

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ANI078-00347

An endangered mint morph of the terrible poison dart frog (Phyllobates terriblis) from a private collection. This is a male and on his back are several tadpoles, which he carries until he can find a suitable wet place to drop them off so they can develop into young frogs. In the wild this would be inside water-filled bromeliad plants high up in trees and away from predators. Some tropical amphibians carry their tadpoles to water.

Chiricahua leopard frog (Lithobates chiricahuensis), a vulnerable (IUCN) and federally threatened species, at the Phoenix Zoo.

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Chiricahua leopard frog (Lithobates chiricahuensis), a vulnerable (IUCN) and federally threatened species, at the Phoenix Zoo.

Chiricahua leopard frog (Lithobates chiricahuensis), a vulnerable (IUCN) and federally threatened species, at the Phoenix Zoo.

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Chiricahua leopard frog (Lithobates chiricahuensis), a vulnerable (IUCN) and federally threatened species, at the Phoenix Zoo.

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

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ANI078-00337

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

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ANI078-00339

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

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ANI078-00333

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

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ANI078-00334

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

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ANI078-00335

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

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ANI078-00336

An endangered, mint morph, male terrible poison dart frog (Phyllobates terribilis) from a private collection. The male carries several tadpoles on his back. In the wild, males carry tadpoles to places where they can grow protected from predators. Often, they use the pools of water that collect in bromeliad plants, high in trees.

A juvenile Shreve's Sarayacu treefrog (Dendropsophus sarayacuensis) collected near Pilalo, Ecuador.

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A juvenile Shreve’s Sarayacu treefrog (Dendropsophus sarayacuensis) collected near Pilalo, Ecuador.

A giant glass frog (Centrolene sp.) tadpole collected near Pilalo, Ecuador.

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A giant glass frog (Centrolene sp.) tadpole collected near Pilalo, Ecuador.

Photo: A tadpole (species unknown) collected near Pilalo, Ecuador.

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A tadpole (species unknown) collected near Pilalo, Ecuador.

An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

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An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

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An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

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An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

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An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

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An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

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An endangered San Lucas marsupial frog (Gastrotheca pseustes) tadpole collected near Pilalo, Ecuador.

A vulnerable Pebas stubfoot toad (Atelopus spumarius) tadpole collected near Pilalo, Ecuador.

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A vulnerable Pebas stubfoot toad (Atelopus spumarius) tadpole collected near Pilalo, Ecuador.

A vulnerable Pebas stubfoot toad (Atelopus spumarius) tadpole collected near Pilalo, Ecuador.

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A vulnerable Pebas stubfoot toad (Atelopus spumarius) tadpole collected near Pilalo, Ecuador.

A vulnerable Pebas stubfoot toad (Atelopus spumarius) tadpole collected near Pilalo, Ecuador.

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A vulnerable Pebas stubfoot toad (Atelopus spumarius) tadpole collected near Pilalo, Ecuador.

Rana Mono Amazonica tadpole (Hylomantis hulli), collected near Pilalo, Ecuador.

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Rana Mono Amazonica tadpole (Hylomantis hulli), collected near Pilalo, Ecuador.

Rana Mono Amazonica tadpole (Hylomantis hulli), collected near Pilalo, Ecuador.

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Rana Mono Amazonica tadpole (Hylomantis hulli), collected near Pilalo, Ecuador.

A slender-legged treefrog (Osteocephalus sp.) tadpole collected near Pilalo, Ecuador.

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A slender-legged treefrog (Osteocephalus sp.) tadpole collected near Pilalo, Ecuador.

An upper Amazon treefrog (Dendropsophus bifurcus) tadpole collected near Pilalo, Ecuador.

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An upper Amazon treefrog (Dendropsophus bifurcus) tadpole collected near Pilalo, Ecuador.

Photo: Tadpoles are preserved in formulin for future study in Limon, Ecuador.

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Tadpoles are preserved in formulin for future study in Limon, Ecuador.

A month-old hourglass treefrog tadpole (Dendropsophus or Hyla ebracatta) at the Henry Vilas Park Zoo.

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A month-old hourglass treefrog tadpole (Dendropsophus or Hyla ebracatta) at the Henry Vilas Park Zoo.

Vulnerable (IUCN) and federally threatened Chiricahua leopard frogs (Lithobates chiricahuensis) at the Phoenix Zoo, Phoenix, Arizona.

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Vulnerable (IUCN) and federally threatened Chiricahua leopard frogs (Lithobates chiricahuensis) at the Phoenix Zoo, Phoenix, Arizona.

An egg containing a tadpole of a blue poison frog (Dendrobates azureus) from a private collection.

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An egg containing a tadpole of a blue poison frog (Dendrobates azureus) from a private collection.

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