Encyclopedia.

Zoologicvm.

A <n>Frilled Lizard</n> displays its defensive frill.

A portrait of a <n>Parablepharis kuhlii</n> mantis.

A <n>Crested gecko</n> licks its eyeball clean. Photo by <n>David Weiller</n>.

U.K. photographer Mark Bridger took these remarkable images of chameleons, geckos, and frogs. Bridger employed a technique known as macro...

The <n>Maranon poison frog</n> (<n>Excidobates mysteriosus</n>), also known as the <n>Galaxy Frog</n>.

A male <n>Rough-nosed horned lizard</n> in Sri Lanka. Photo by <n>Shanelle Wikramanayake</n>.

A <n>Rough-nosed horned lizard</n> in <n>Sri Lanka</n>'s <n>Sinharaja Forest Reserve</n>. Photo by <n>Tharindu Makuloluwa</n>.

A <n>Red-backed poison dart frog</n>. Photo by <n>ZTH Photography</n>.

Red-backed Poison Frog (Ranitomeya Reticulata)

A male <n>rough-nosed horned lizard</n> (<n>Ceratophora aspera</n>). Photo by <n>Dinal Samarasinghe</n>.

A <n>Grizzly Bear</n> snarling in the USA, photographed by <n>NHPA</n>.

A portrait of a <n>Brown basilisk lizard (Basiliscus vittatus)</n> with an <n>ant</n> on its head.

Brown basilisk lizard (Basiliscus vittatus) with ant portrait

A four-month-old <n>Margay</n> kitten, photographed by <n>Joel Sartore</n> for the <n>Photo Ark</n> project.

A <n>Bolitoglossa colonnea</n> salamander from Panama and Costa Rica. Photo by <n>Francesco Munoz</n>.

A baby <n>mountain goat</n> jumps over its sibling on <n>Mount Evans</n>, Colorado. Photo by <n>Verdon Tomajko</n>.

A <n>Basin tree frog</n>. Photo by <n>libutron</n>.

A macro photograph of a <n>Trilobite Beetle (Platerodrilus ruficollis)</n>.

A rare black leopard in India's <n>Tadoba Andhari Tiger Reserve</n>, June 2020. Photo by <n>Anurag Gawande</n>.

A <n>Golden-handed Tamarin</n> at the <n>San Diego Zoo</n>, photographed by <n>Logan Pierce</n> in 2007.

A portrait of the jaguar <n>Pirata</n> in the Pantanal, Brazil. Photo by <n>Marlon du Toit</n>.

A <n>Sunda flying lemur</n> clings to a tree. Photo by <n>iStock</n>.

A male <n>Malagasy leaf-nosed snake</n> from Madagascar, photographed by <n>Sachin Rai</n>.

A <n>Bare-throated Bellbird</n> in Brazil, which has one of the loudest calls of any bird.

A <n>Common Reed Frog</n> in Nanyuki, Kenya, photographed by <n>Steve Jurvetson</n> in 2005.

The <n>Devil's Flower Mantis</n> (<n>Idolomantis diabolica</n>), a species of praying mantis native to Africa.

Devils Flower Mantis - Idolomantis diabolica

<n>Emperor penguins</n> in McMurdo Sound, Antarctica. Photo by <n>Bill Curtsinger</n> for <n>National Geographic</n>, 2006.

The <n>Amu Darya sturgeon</n> (*<n>Pseudoscaphirhynchus kaufmanni</n>*). Photo by author <n>V. J. Birstein</n>.

A <n>Green Iguana</n> photographed by <n>Petr Bambousek</n>.

A <n>male rough-nosed horned lizard</n>. Photo by <n>Shanelle Wikramanayake</n>.

A <n>Black Rain Frog</n> (*Breviceps macrops*), a species known for its perpetually grumpy expression.

The <n>Tailed Emperor caterpillar</n> (<n>Polyura sempronius</n>), also known as the <n>Dragon Head Caterpillar</n>.

A <n>Wallace's flying frog</n> in Borneo, photographed by <n>Tim Laman</n> for <n>National Geographic</n>.