A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Dolphins have names for one another.
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A puppy is born blind, deaf, and toothless.
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A new born kangaroo is small enough to fit in a spoon!
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