File:The south polar skua (Stercorarius maccormicki) in the 'long call' pose.jpg

English: The photograph shows a South Polar Skua (Stercorarius maccormicki) in a posture characteristic of the “long call” — a prolonged vocalization display with distinct behavioral and communicative significance. The bird holds its body elongated, neck raised, and beak wide open, corresponding to the phase of maximal acoustic output. This posture ensures efficient propagation of the sound signal across the open Antarctic landscape. Partially spread or slightly lowered wings may enhance the visual component of the display and serve a demonstrative function. The long call is typically associated with territorial or defensive behavior, particularly during the protection of a nesting area. Capturing this posture in a photograph is important for the accurate interpretation of bioacoustic and ethological observations.