Posture
Watching a bird's posture helps place the bird in a specific group. Examples are horizontal, standing and vertical postures.
Horizontal Posture
Crows, kinglets, vireos and warblers perch with their tails pointing out at an angle.
Standing Posture
Robins and other members of the thrush family hold their breasts forward and have an alert, upright posture.
Vertical Posture
Flycatchers, hawks and owls are some of the birds with a vertical posture. They sit upright with their tails pointing straight down.