With few exceptions, bee-eaters are gregarious and social. Only about five species are likely completely solitary. Fifteen species are colonial or loosely colonial. Physical body contact is not common among birds, but with bee-eaters it is characteristic. A branch catching the early morning sun will attract first one, then another, and finally a whole family of bee-eaters
that will huddle closely together, all facing into the sun. Colony sites are centers of high activity, and there is a cacophony of sound as family members greet each other, fuss over the proximity of intruders to their nesting hole, or fight to remove an unwanted visitor.
Complex social relationships might be quite common among bee-eaters, particularly those with sedentary populations, but few species have been studied in enough detail to
know for certain. Detailed studies of the white-fronted bee-eater (Merops bullockoides) in Kenya by Stephen Emlen, Robert Hegner, and Peter Wrege revealed one of the most complex societies known for any species of bird.
Populations of white-fronted bee-eaters spend the entire year roosting together at a colony that may contain from 30 to 450 birds, and the population is structured into extended family groups or "clans" that include several generations. During the non-breeding season, all members of a clan, as many as 15 individuals, may roost together in one burrow at the colony. For breeding, clans often split up into nuclear family sub-groups. Members of a clan interact frequently, joining and greeting one another on perches near the colony, roosting together, or visiting each other's roosting burrows.
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