They always walk with a sneaky, alert posture.

When surveying an area for predators, zebras will stand in an alert posture; with ears erect, head held high, and staring.

First, to further reduce tensions, I am directing that all United States strategic bombers immediately stand down from their alert posture.

This can be as a pre-planned event or on demand from an alert posture (ground or airborne).

He could tell by the lad's alert posture and constant checking that the starship was on course, on speed.

He immediately ordered all of his companies to be on full alert posture and directed them to take cover and be prepared for an attack.

She glanced at him, then looked thoughtfully toward a Pnumekin in the center of the room: a tall haggard man with an unusually alert posture.

Muscles rippled in his shoulders as he flexed them, seeking an alert posture in the deep couch.

Suddenly, he assumed a more alert posture.

Males assume an alert posture, ready for a challenge from another male, or from a predator.