CONTENTS. 



Pago. 



Introduction 7 



Distribution 8 



Migration 9 



North American herons and their allies 10 



Flamingo (Phoenicopterm ruber) 10 



Roseate spoonbill (Ajaia ajaja) 12 



White ibis (Guam alba) 14 



Scarlet ibis (Guara rubra) 16 



Glossy ibis (Plegadis autumnalis) 17 



White-faced glossy ibis (Plegadis guarauna) 19 



Wood ibis ( Mycteria americana) 22 



Cayenne ibis (Harpiprion cayennensis) 24 



Jabiru ( Jabiru mycteria) 24 



Bittern (Botaurus lentiginosus) 26 



Pinnated heron (Botaurus pinnatus) 29 



Least bittern (Ixobrychus exilis) 29 



Cory least bittern (Ixobrychus neoxenus) 32 



Great white heron (Ardea occidentalis) 33 



Great blue heron (Ardea herodias herodias) 33 



Ward heron (Ardea herodias wardi) 36 



Treganza heron (Ardea herodias treganzai) 36 



Northwestern coast heron (Ardea herodias fannini) 36 



California great blue heron (Ardea herodias hyperonca) 37 



West Indian great blue heron (Ardea herodias adoxa) 37 



Mexican great blue heron (Ardea herodias lessoni) 37 



Lower California great blue heron (Ardea herodias sanctilucae) 38 



Galapagos great blue heron (Ardea herodias cognata) 38 



European heron (Ardea dnerea) 40 



Egret (Hvodias egretta) 40 



Snowy egret (Egretta candidissima) 45 



Readish egret (Dichromanassa rufescens) 49 



Louisiana heron (Hydranassa tricolor ruficollis) 51 



Demi -egret (Hydranassa tricolor tricolor) 52 



Little blue heron (Florida caerulea) 52 



Zeledon boatbill ( Cochlearius zeledoni) 55 



Pileated heron (Pilherodius pileatus) 55 



Green heron (Butorides virescens virescens) 56 



Anthony green heron (Butorides virescens anthonyi) 58 



Frazar green heron (Butorides virescens frazari) 59 



Green heron (Butorides virescens subspp) 59 



Lembeye green heron (Butorides brunescens) 60 



Striated heron (Butorides striata) 60 



Black-crowned night heron (Nycticorax nycticorax naevius) 60 



Agami heron (Agamia agami) 64 



Yellow-crowned night heron (Nyctanassa violacea) 64 



Lineated tiger-bittern ( Tigrisoma lineatum) 67 



Nicaraguan tiger-bittern ( Tigrisoma excellens) 67 



Mexican tiger-bittern (Heterocnus mexicanus) 67 



Index 69 



5 



