The Fauna Archive
Wildlife facts worth keeping — checked, sourced, and plainly told

Animals That Mate for Life: 12 Species That Pair Bond

Animals that mate for life include gray wolves, beavers, gibbons, prairie voles, bald eagles, mute swans, Laysan albatrosses, sandhill cranes, black…

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Animals That Mate for Life: 12 Species That Pair Bond

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Ocean Life

How Do Dolphins Sleep Without Drowning?

Dolphins sleep by resting one brain hemisphere at a time, a pattern called unihemispheric sleep.

6 min read
Mammals

How Fast Can a Cheetah Run? Top Speed and Sprint Facts

A cheetah can reach roughly 60 mph in a short sprint. Wild tracking research recorded 58 mph, while Cincinnati Zoo reported a 61 mph maximum for Sarah.

10 min read
Mammals

How Long Do Elephants Live? An Honest Range

Elephants can reach their 50s, and a small number live longer, but a simple 60–70-year average is too confident.

6 min read
Ocean Life

How Long Do Sea Turtles Live? Lifespan of All 7 Species

Sea turtles live roughly 30 to 70 years or more, depending on the species.

8 min read
Mammals

What Makes an Animal a Mammal? The 3 Traits That Count

An animal is a mammal if it has three traits no other living animal shares: hair at some stage of life, mammary glands that make milk for its young, and…

8 min read
Ocean Life

Marine Invertebrates Examples: Recognize the Main Groups

Marine invertebrates are sea animals without a backbone. Familiar examples fall into six main groups: sponges; cnidarians such as jellyfish, sea anemones…

8 min read

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