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Three species of trees are commonly referred to as redwoods: California’s coast redwood (Sequoia sempervirens) and giant sequoia (Sequoiadendron giganteum), and China’s dawn redwood (Metasequoia glyptostroboides).

Spirals in Giant Sequoia Cones

If you look at a giant sequoia cone with the bottom end facing you, you will notice that the scales form spirals. This is the Fibonacci sequence found everywhere in nature: in the spiral of snail shells and in the shape of storms and breaking waves, for example.

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Did You Know This Salamander Rattles?

The California giant salamander (Dicamptodon ensatus) is one of only two salamanders in the world that vocalize. This large spotted amphibian lives in the coast redwood forests of primarily Mendocino, Napa, Sonoma and Santa Cruz counties. Listen on this video by David Wake.

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Fossilized Redwoods

Did you know that many fossilized redwood ancestors exist throughout the Southwestern US? About 34 million years ago, a close relative of the coast redwood and giant sequoia flourished in what is now the high desert of central Colorado. In Florissant, CO, an extremely unique petrified trio of redwood trees was found – the only fossil of a redwood “fairy ring” or family circle ever discovered. These fossils offer a detailed glimpse back in time at a fascinating period in climatic change, when the climate shifted in this region from a warm, subtropical environment to a more temperate and cool climate.

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Check out more fun redwood facts on the Interactive Fact Finder Map! You can see redwoods facts by region — Coast Redwoods or Giant Sequoias.