Hoatzin (Opisthocomus hoazin) favor the leaves of giant arum; both are acclimated to a riparian habitat. The plant itself grows to ~ ft & typically can grow to a massive 8 ft tall & the leaves can be as big as 13 ft.
Royal Botanic Garden Edinburgh :: :: Amorphophallus Titanum's Corm, Weighing for Guiness Book of Records Aug 2010 - Record breaker! - the corm weighs in at a record. The previous largest recorded weight was
The Titan arum is one of the biggest plants on earth and we have our own growing here at Eden. This plant only flowers for 48 hours and attracts insects to pollinate it with its powerful stench of rotting flesh.