An owl in a forest hears two different sounds: one is the rustle of leaves, the other is an echo of its own hoot. Which sound tells it it's not alone?
Category: Brain · Difficulty: expert
Hint: Consider the nature of echoes and their sources.
Answer
The rustle of leaves
Explanation
The rustle of leaves indicates the presence of another creature, while the echo is merely a reflection of the owl's own sound.
This is a expert brain riddle — one of the harder riddles here. The answer is The rustle of leaves.
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