AlWEID^: 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- 



PlG. 456. —Herons, idealized from Ardca clnerea. (From Michelet.) 



What in shortness and especially stoutness of bill ; .vhile the Bitterns {Botaurus and Ardetta^ 

 the South American genera Tigrisoina, Zebnlus, and a few others, are stiU better marked! 



