White ibis, like many other bird species, engage in behaviors such as touching beaks as a part of their social interactions.
 
Touching beaks, referred to as "billing," is a common behavior among bonded pairs of birds. It serves as a form of mutual grooming and reinforces the pair bond. For white ibis, this behavior might be observed between mated individuals, helping to maintain a strong connection between partners.
 
Touching beaks can be a way for ibis to communicate affection, reassurance, or a desire to strengthen social bonds within a group.
 
For birds that live in colonies or groups, such as white ibis, touching beaks can contribute to social cohesion within the flock. It helps maintain a sense of unity and cooperation among individuals.
 
Allopreening is a behavior where birds groom each other's feathers, and it often involves the beak. While not exactly touching beaks, this form of mutual grooming is a way for birds to strengthen social bonds, enhance hygiene, and remove parasites.