Parrot parents "name" their children with a signature call.
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In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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The cat brain weighs about 30g.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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