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No alien species have yet been found or identified as such, therefore no definite answer can be given. If we want to speculate, in an infinite universe there will be a chance that headless species will occur, as headless species occur on Earth. They might even be intelligent!
What else can I help you with?
Do some alien races have less body parts?
Yes. Some alien races have less body parts (i.e. headless, eyeless, noseless, mouthless, earless, etc.). But currently, it is unknown.
Do some alien races have two hearts?
Yes. Some alien races have two hearts.
Do some alien races have two pupils in each eye?
Two pupils in the eye would be eerie,and perhaps some alien races have them.
Do some alien races have five arms?
Some alien races, if they exist, may have five arms.
Do some alien races have ten arms?
From the data we have, we have not discovered any alien races.
Do some alien races have reptavian characteristics?
If aliens exist there could be some alien races that have reptavian characteristics.
Do some alien races have multiple heads?
Yes. Some alien races have multiple heads. But currently, it is unknown.
Do some alien races have multiple hearts?
Yes. Some alien races have multiple hearts. But currently, it is unknown.
Do some alien races have upside-down faces?
Yes. Some alien races have upside-down faces.
Do some alien races have multiple legs?
Yes. Some alien races have multiple legs. But currently, it is unknown.
Do some alien races have peculiar characteristics?
If aliens exist, some alien races could possibly have simian characteristics, such as monkeys, gorillas, etc.
Do some alien races have multiple ears?
If there are alien races they indeed might have multiple ears.
