sentences:  On the other hand, it is not a universal trait of gleaning birds to join with other species or even to be gregarious with their own kind.The leafbirds of Asia are foliage-gleaners, but are often found singly or in pairs.Also, where multiple species of gleaning birds forage in the same area, they may show niche segregation; for example, one species may stick to conifers while another species inhabits broadleaf trees, or they may even divide up a habitat, with smaller species feeding among higher, smaller tree branches and larger species staying on lower, larger branches.