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Mating glass frogs (family Centrolenidae) in the characteristic amplexus position, with the male grasping the female from behind.

Pre-K - Higher Ed
Glass frogs are named for their translucent skin, which allows internal structures to be seen. The female's yellow eggs are prominent here. Glass frogs live in the moist tropical forests of Central and northern South America. Filmed in...
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CU Monitor Lizard ear, hole behind eye and edge of mouth, Kenya

Pre-K - Higher Ed
CU Monitor Lizard ear, hole behind eye and edge of mouth, Kenya
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CU sequence of Head lice feeding, shows blood inside gut, United Kingdom; SEQUENCE OF CLIPS, SPECIAL TERMS APPLY

Pre-K - Higher Ed
CU sequence of Head lice feeding, shows blood inside gut, United Kingdom; SEQUENCE OF CLIPS, SPECIAL TERMS APPLY
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Butterfly, CU newly emerged blue and black butterfly on underside of plant stem, Panama

Pre-K - Higher Ed
Butterfly, CU newly emerged blue and black butterfly on underside of plant stem, Panama
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CU sequence of Head lice feeding, shows blood inside gut, United Kingdom; SEQUENCE OF CLIPS, SPECIAL TERMS APPLY

Pre-K - Higher Ed
CU sequence of Head lice feeding, shows blood inside gut, United Kingdom; SEQUENCE OF CLIPS, SPECIAL TERMS APPLY
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BCU African Bull Frog (Pyxicephalus adspersus) removing protective skin of estivation, Africa

Pre-K - Higher Ed
BCU African Bull Frog (Pyxicephalus adspersus) removing protective skin of estivation, Africa
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CU adult elephants, Elephas maximus, ear and eye, Western Ghats, India

Pre-K - Higher Ed
CU adult elephants, Elephas maximus, ear and eye, Western Ghats, India
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Mating glass frogs (family Centrolenidae) in the characteristic amplexus position, with the male grasping the female from behind.

Pre-K - Higher Ed
Glass frogs are named for their translucent skin, which allows internal structures to be seen. Glass frogs live in the moist tropical forests of Central and northern South America. Filmed in the Ecuadorian Amazon rainforest
Stock Footage0:14
Getty Images

Mating glass frogs (family Centrolenidae) in the characteristic amplexus position, with the male grasping the female from behind.

Pre-K - Higher Ed
Glass frogs are named for their translucent skin, which allows internal structures to be seen. Glass frogs live in the moist tropical forests of Central and northern South America. Filmed in the Ecuadorian Amazon rainforest
Stock Footage0:11
Getty Images

Mating glass frogs (family Centrolenidae) in the characteristic amplexus position, with the male grasping the female from behind.

Pre-K - Higher Ed
Glass frogs are named for their translucent skin, which allows internal structures to be seen. Glass frogs live in the moist tropical forests of Central and northern South America. Filmed in the Ecuadorian Amazon rainforest
Stock Footage0:14
Getty Images

BCU African Bull Frog (Pyxicephalus adspersus) eating skin shed after estivation, Africa

Pre-K - Higher Ed
BCU African Bull Frog (Pyxicephalus adspersus) eating skin shed after estivation, Africa
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BCU African Bull Frog (Pyxicephalus adspersus) eats skin shed after estivation, Africa

Pre-K - Higher Ed
BCU African Bull Frog (Pyxicephalus adspersus) eats skin shed after estivation, Africa
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BCU Eye of African Savannah Monitor Lizard, Kenya

Pre-K - Higher Ed
BCU Eye of African Savannah Monitor Lizard, Kenya
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Sleeping dragon. Close-up portrait of a resting vibrant Lizard. Selective focus. Green Iguanas are native to tropical areas of Mexico, Central America, South America, and the Caribbean

Pre-K - Higher Ed
Sleeping dragon. Close-up portrait of a resting vibrant Lizard. Selective focus. Green Iguanas are native to tropical areas of Mexico, Central America, South America, and the Caribbean
Stock Footage0:16
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Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot

Pre-K - Higher Ed
Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot
Stock Footage0:11
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Sleeping dragon. Close-up portrait of a resting vibrant Lizard. Selective focus. Green Iguanas are native to tropical areas of Mexico, Central America, South America, and the Caribbean

Pre-K - Higher Ed
Sleeping dragon. Close-up portrait of a resting vibrant Lizard. Selective focus. Green Iguanas are native to tropical areas of Mexico, Central America, South America, and the Caribbean
Stock Footage0:21
Getty Images

Sleeping dragon. Close-up portrait of a resting vibrant Lizard. Selective focus. Green Iguanas are native to tropical areas of Mexico, Central America, South America, and the Caribbean

Pre-K - Higher Ed
Sleeping dragon. Close-up portrait of a resting vibrant Lizard. Selective focus. Green Iguanas are native to tropical areas of Mexico, Central America, South America, and the Caribbean
Stock Footage0:09
Getty Images

Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot

Pre-K - Higher Ed
Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot
Stock Footage0:16
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Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot

Pre-K - Higher Ed
Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot
Stock Footage0:13
Getty Images

Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot

Pre-K - Higher Ed
Close-up of a mosquito sucking blood on human skin, Mosquito is carrier of Malaria/ Encephalitis/ Dengue, Macro shot
Stock Footage0:19
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Newly born

Pre-K - Higher Ed
Tiny common midwife toad (Alytes obstetricans) getting out of the egg
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Little common toad

Pre-K - Higher Ed
Little common midwife toad (Alytes obstetricans) in frontal view
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WS Chouwara traditional leather tannery in Old Fez, vats for tanning and dyeing leather hides and skins / FEZ, Morocco

Pre-K - Higher Ed
WS Chouwara traditional leather tannery in Old Fez, vats for tanning and dyeing leather hides and skins / FEZ, Morocco
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CU Grass Snake laying an egg, UK

Pre-K - Higher Ed
CU Grass Snake laying an egg, UK