As a means to spot prey, both snow leopards and owls have developed extraordinary night vision. This is an example of:

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Convergent evolution. Both species have developed a similar characteristic for a similar purpose.
Key Takeaway: Convergent evolution occurs when two distinct species become similar in some way as a result of similar pressures. In the case of both the snow leopard and the owl, the pressure is the need for food. As nocturnal animals, both animals have evolved a distinct selection advantage which allows them to hunt at night and conserve energy that would be used during sunlight.

As a Means to Spot Prey, Both Snow Leopards and Owls