High Quality Content by WIKIPEDIA articles! Hemitriccus is a genus of small South American birds in the Tyrannidae family. They are commonly known as tody-tyrants or bamboo-tyrants, but the former name is (or was) also shared with several members of the genus Poecilotriccus. Several species from the genus Hemitriccus are very similar, and consequently best separated by their voice.The tyrant flycatchers (Tyrannidae) are a family of passerine birds which occur throughout North and South America, but are mainly Neotropical in distribution. They are now considered the largest family of birds on Earth, with around 400 species. In every country in the Americas, except for the United States and Canada, they are the most diverse avian family. As could be expected from a family this large, the members vary greatly both in shape, patterns and colours. Some Tyrant flycatchers superficially resemble the Old World flycatchers. They are members of suborder Tyranni (suboscines) that do not have the sophisticated vocal capabilities of the songbirds.