ARDEIDJE: HERONS. 655 
in vogue have been successively detached from Ardea, the typical one, with which many 
of them should be reunited. The Night Herons" {Nyctiardea and Nycterodius) differ some- 
FlG. 456. —Herons, idealized from Ardea cinerea. (From Michelet.) 
what in shortness and especially stoutness of bill; while the Bitterns (Botauriis and Ardettd), 
the South American genera Tigrisoma^ Zebrilus, and a few others, are still better marked. 
