Its posture consists of perching upright on wire fences and high perches. This enables passerines to sleep while perching without falling off. Malaria mainly affects passerines (perching birds). She terminates these unwanted advances by exiting the nest and perching nearby. Like other lapwings they are ground birds that are incapable of perching. Sharpened spikes to deter perching and loafing are commonly used. They are a group of perching birds named for their bobbing or dipping movements. A songbird is a bird belonging to the clade Passeri of the perching birds (Passeriformes). The passerines (perching birds) alone account for well over 5,000 species. Various Passeriformes (perching birds) are commonly referred to as warblers. The car slowly drives away as thousands of birds are ominously perching. The leg of passerine birds contains an additional special adaptation for perching. These types of legs help with perching and/or climbing and clinging. The golden lancehead's diet consists mostly of perching birds. Darter vocalizations include a clicking or rattling when flying or perching.