You've been designing brilliant new contenders for the Astonishing Amazon Animal Showdown – piranhas with jaws that regrow in whole quarters, a hoatzin that ferments its dinner in a throat pouch, a tailless whip scorpion that senses danger through its legs, and a jaguar with one of the most powerful bites of any mammal. Thank you to every reader who did the research and made the case for their champion.
Capuchin monkey

Pink river dolphin – ‘The Amazon’s Einstein’

Poison dart frog – ‘Jewel of the Rainforest’

Scarlett, age 10, Upton
Piranha – ‘Small but Deadly’

Amazon horn frog

Hoatzin bird

Scariest creature in the Amazon

Aquatic coral snake

Comi-chua

Tailless whip scorpion
Yellow-spotted Amazon River turtle

Tapir

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This competition asked you to design a secret egg hidden somewhere in nature, and your entries went far beyond the obvious nests and burrows. Eggs arrived disguised as pine cones, floating on leaf boats, perched on volcano ledges, tucked into cloud cover and even masquerading as chocolate Easter eggs to fool foxes. Thank you to every reader who took up the challenge and thought like a parent bird, fish, reptile or imaginary creature trying to keep their precious egg safe.
We were swept away by the response to this competition. Letters arrived from rivers across the world – the Thames, the Mississippi and many more unnamed waterways – each one brimming with personality, passion and a genuine love of the natural world. You gave your rivers voices that were worried, hop...