100+ Animal Riddles To Challenge Your Brain

My firsts in old but never in young, my second's in whistled but never in sung. My third's in lunar and in light, my whole is a creature that flies at night.

I live upside down, and on Halloween, I will give you a big surprise. I see with my ears and not my eyes.

I look like you, except I have a tail; I am a good tree climber. I can mimic you very easily. I eat fruits, insects and flowers. My favourite food is bananas.

My name comes from the Greeks and means river horse. I am one of the most dangerous animals in Africa and can outrun humans.

I am a large unique cat found all around the world.
But being black in color, in the dark night I may startle you.

What goes in the water black and comes out red?

What animal would you get crossed a duck, a beaver, and an otter?

A prickly house a little host contains;
The pointed weapons keep back from pains,
So he, unarmed, safe in his fort remains.

I'm not a bird, yet I can fly. I have no feathers, but scales am I. What creature might I be?

I have wings but I am not a bird. I am small, colorful, and beautiful. I live in gardens and fields and forests. I used to be a caterpillar. 

It has eight legs and weaves with flair,
Catching meals right out of the air.

It hops and jumps, avoids the street,
Long ears twitching, fast on its feet.

In colonies I march in line,
Lift many times my weight just fine.

In the jungle, it swings from tree to tree, using its tail like a limb — wild and free.

Without making a sound, it glides through the night, seeing its prey in very low light.