Can you tell which giraffe doesn’t have a twin with matching spots?

Which giraffe is the odd one out?

Gergely Dudás/Dudolf

In this brainteaser by Gergely Dudás, there are 19 giraffes — nine pairs with identical spots and one outlier with different spots. Can you tell which one doesn’t match?

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This giraffe is the odd one out.
There it is.

Gergely Dudás/Dudolf

The second giraffe from the right’s pattern of spots is unmatched by any of the other giraffes.