Tmetothylacus References Tmetothylacus bird genus Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: pipitin the genera Anthus and Tmetothylacus in the family Motacillidae (order Passeriformes, suborder Passeri [songbirds]). They are found worldwide except in polar regions. Read Morein the genera Anthus and Tmetothylacus in the family Motacillidae (order Passeriformes, suborder Passeri [songbirds]). They are found worldwide except in polar regions. Read More