Definition

Military slang for helicopters or other aircraft. Because 'rotary-wing aircraft' takes too long when you're requesting emergency extraction.

Example Usage

We've got two birds inbound for troop transport, ETA ten minutes.

Origin

Natural metaphorical extension from aircraft to flying creatures

Fun Fact

Different types have specific nicknames: Blackhawks are 'hawks,' Chinooks are 'hooks,' and Apaches are 'snakes.'

Source: Military aviation slang

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