The great tail- and wing-fanning courtship display of the male Great Argus is among the most remarkable on Earth. At rest, the long feathers and tail feathers give the male an excessively lengthy, freight-train-like appearance. Female more warmly colored than male but lacks long plumes and has paler blue head. Rare Crested Argus similar but has striped brown head. Inhabits lowland to foothill forests with a relatively thin understory and mature trees, from which the male’s lovelorn-sounding courtship call “kow-WOW” resonates loudly, even as it remains frustratingly hidden.