He then bowed and prolonged very much his bowing. He then bowed and prolonged his bowing, but it was less than the first bowing. Muslim prayer involves bowing, kneeling and prostration. It is the female equivalent of male bowing or genuflecting in Western cultures. This causes a bowing of the back, seen as a slouching posture. Males also give a bow display, bowing with wings lowered and tail fanned. The three most common techniques are plucking, bowing, and striking. The most essential part of bowing technique is the bow grip. Ruku' is bowing down in the standing position during daily prayers (salat). The faithful often venerate relics by bowing before the reliquary or kissing it. The procession ends with the groom bowing to the bride's father. Anjali mudra is normally accompanied by a slight bowing of the head. The planking of the ship's port side was bowing inwards by up to . Birds also engage in mutual bowing, trumpeting, and preening. Courtship involves bowing, billing and nibbling.