The smallest known bird egg belongs to the hummingbird, measuring only about 10-13 millimeters (0.39-0.51 inches) long and weighing less than a paperclip.

The Japanese spider crab (Macrocheira kaempferi) holds the record for the greatest leg span of any arthropod, reaching up to 3.7 meters (12 feet) from claw to claw, and can live up...

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The gray whale (Eschrichtius robustus) undertakes one of the longest annual migrations of any mammal, traveling up to 20,000 km (12,430 miles) round trip from Arctic feeding ground...

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The Goliath Birdeater (Theraphosa blondi) is the largest spider by mass, with a leg span of up to 30 cm (12 inches) and weighing over 170 grams (6 oz), though its venom is relative...

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The ocean sunfish (Mola mola) lays more eggs than any other vertebrate, producing up to 300 million eggs at a time, though only a tiny fraction survive to adulthood.

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The longest known lifespan for an individual terrestrial animal is held by 'Jonathan' the Seychelles giant tortoise, who is currently alive and estimated to be 192 years old in 202...

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