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Eggs of Maria's Giant Glass Frog (Nymphargus mariae) in the Ecuadorian Amazon with a waterfall in the background

Pre-K - Higher Ed
Glass frogs (family Centrolenidae) lay their eggs on vegetation overhanging streams and the tadpoles drop into the water once they have developed, thus avoiding aquatic egg predators. Listed as Endangered by the IUCN.
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Eggs of Maria's Giant Glass Frog (Nymphargus mariae) in the Ecuadorian Amazon.

Pre-K - Higher Ed
Glass frogs (family Centrolenidae) lay their eggs on vegetation overhanging streams and the tadpoles drop into the water once they have developed, thus avoiding aquatic egg predators. Listed as Endangered by the IUCN.
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Sulphur-crested Cockatoos Raiding Trash Cans, Australia

Pre-K - Higher Ed
A flock of sulphurcrested cockatoos (Cacatua Galerita) raiding garbage bins, New South Wales, Australia. Native Australian bird.
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Two Sulphur-crested Cockatoos, Australia

Pre-K - Higher Ed
Two Sulphur-crested cockatoos, (Cacatua Galerita) in the Royal National Park south of Sydney, New South Wales, Australia
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Cats Mating

Pre-K - Higher Ed
Cats Mating
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Two Boat Tailed Grackle birds calling

Pre-K - Higher Ed
Two Boat Tailed Grackle birds calling
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Dog sitting in armchair

Pre-K - Higher Ed
Dog sitting in armchair
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Two boat-tailed Grackles clucking

Pre-K - Higher Ed
Two boat-tailed Grackles clucking
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A humpback whale (Megaptera Novaeangliae) in the North Pacific Ocean engages in lobtailing, slapping its flukes on the surface of the water.

Pre-K - Higher Ed
A humpback whale (Megaptera Novaeangliae) in the North Pacific Ocean engages in lobtailing, slapping its flukes on the surface of the water.
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Love

Pre-K - Higher Ed
Love
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A humpback whale (Megaptera Novaeangliae) slaps the surface of the water with one of it's pectoral fins. Possible reasons for this behavior, known as pec slapping, include dislodging parasites, stunning prey, or simply play.

Pre-K - Higher Ed
A humpback whale (Megaptera Novaeangliae) slaps the surface of the water with one of it's pectoral fins. Possible reasons for this behavior, known as pec slapping, include dislodging parasites, stunning prey, or simply play.
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Puppies Drinking from Tap Water

Pre-K - Higher Ed
Puppies Drinking from Tap Water
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HA Crocodile in shallow water

Pre-K - Higher Ed
High angle shot of a crocodile swimming in a shallow water by the river bank. Costa Rica. Central America, The Americas. Also available in 4K resolution.
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Burrowing Owl

Pre-K - Higher Ed
an Owl uses a fence post to catch meals from near Three Forks, Montana
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Desert Elephant; mother defensive of calf, Ugab River Basin, Namibia: desert-dwelling population of African Bush Elephant though not distinct subspecies

Pre-K - Higher Ed
Desert Elephant; mother defensive of calf, Ugab River Basin, Namibia: desert-dwelling population of African Bush Elephant though not distinct subspecies
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Human sperm swimming, Interference contrast

Pre-K - Higher Ed
Human sperm swimming, Interference contrast
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Semenal plasma - cells and Human sperm in semen, Interference contrast

Pre-K - Higher Ed
Semenal plasma - cells and Human sperm in semen, Interference contrast
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Deformed two headed Human sperm, Phase contrast

Pre-K - Higher Ed
Deformed two headed Human sperm, Phase contrast
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Human sperm swimming, Interference contrast

Pre-K - Higher Ed
Human sperm swimming, Interference contrast
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Human sperm, single sperm swimming with difficulty

Pre-K - Higher Ed
Human sperm, single sperm swimming with difficulty
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Human sperm, single sperm swimming strongly, track along with sperm

Pre-K - Higher Ed
Human sperm, single sperm swimming strongly, track along with sperm
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Human sperm swimming, Interference contrast

Pre-K - Higher Ed
Human sperm swimming, Interference contrast
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Single Human sperm swimming in semenal plasma, Interference contrast

Pre-K - Higher Ed
Single Human sperm swimming in semenal plasma, Interference contrast
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Human sperm, single sperm swimming

Pre-K - Higher Ed
Human sperm, single sperm swimming