ABBEIB^: HERONS. 



655 



in vogue have been successively detached from Ardea, the typical one, vrith which many 

 of them should be reunited. The "Night Herons" (NycUa/rdea and Nycterodms) differ some- 



Fig. 456, — Herons, idealized from Ardea cinerea. fFrom Miohelet.) 



what in shortness and especially stoutness of bill; vrhile the Bitterns (Botawrus and Ardetta), 

 ■the South American genera Tigrisoma, Zebrilus, and a few others, are stiU better marked. 



