ocr: PAIR BONDING - OME BIRDS spend a few minutes and stay together for years. During ) together before mating and going pair bonding, the two birds carry out their separate ways. But many long- rituals that help them to recognize each lived birds, such as swans, pair up other and work together as a team. HEAD-TO-HEAD CONTACT PAIR OF MUTE SWANS Pair bonding reduces the birds' instinctive aggression. - -