Tawny frogmouth Tawny frogmouth The tawny frogmouth ("Podargus strigoides") is a species of frogmouth native to and found throughout the Australian mainland and Tasmania. Tawny frogmouths are big-headed, stocky birds often mistaken for owls due to their nocturnal habits and similar colouring. The tawny frogmouth is sometimes incorrectly referred to as "mopoke", a common name for the southern boobook, whose call is often confused with the tawny frogmouth's. The tawny frogmouth was first described in 1801 by English naturalist John Latham. Its specific epithet is derived from the Latin "strix" meaning "owl" and "oides" meaning "form". Tawny frogmouths belong to the frogmouth
Failure to refer Failure to refer Failure to refer, also reference failure or failure of reference, is the concept that names can fail to name a real object. According to Bertrand Russell's theory of truth, there is only one actual world, and a statement's truth value depends on whether the statement obtains in the actual world. Continuing the tradition of Gottlob Frege, Bertrand Russell posited that a name picks out, or refers to, a real object in the world (Russell's correspondence theory of truth). The name "Genghis Khan" thus picks out the 12th and 13th century Mongol leader we know by that name.