46 IBIDID^E 



Adult female nuptial. Similar in plumage to the male. 



Adult winter, male and female. Similar to the nuptial 

 plumage. 



Immature, male and female. Head and neck streaked 

 and blotched with greyish-white, and the plumage exhibits 

 no gloss. 



BEAK. Brown and decurved. 



FEET. Brown. 



IRIDES. Hazel ; bare skin round the eyes, greenish-grey. 



AVERAGE MEASUREMENTS. 



TOTAL LENGTH 22 in. 



WING 10-75 



BEAK 5 ,, 



TARSO-METATAESUS 4 ,, 



EGG 2 x 1-5 in. 



Allied Species and Representative Forms. P. guarauna, 

 with the feathers which surround the bare space on the 

 forehead edged white, is the American representative, but 

 the Old World bird has been found in the Eastern United 

 States. 



