In cases like the Great Crested Grebe, the pairs form life (or at least long-lasting) partnerships. In that case, there are also pair-bonding dances throughout the mating season, and through the whole period of raising the young. If pairs get separated, there are exceptionally vigorous dances when they come together. There are a number of "dance routines" which occur in the different circumstances of life. All this behaviour is inherited, though the individual bird remembers the place and the partner permanently.