The snowy heron is a rare plume bird seen occasionally along the coast.
Abu '1 Kasim Mansur (or Hasan), who took the nom de plume of Firdousi, author of the epic poem the Shahnama, or "Book of Kings," a complete history of Persia in nearly 60,000 verses, was born at Shadab, a suburb of Tus, about the year 329 of the Hegira (941 A.D.), or earlier.
The young lack the ornamental plume, and in them the head and neck are clothed with short black feathers, while the bill is yellow.
Pulmonata are widely distinguished from a small number of Streptoneura at one time associated with them on account of their mantle-chamber being converted, as in Pulmonata, into a lung, and the ctenidium or branchial plume aborted.
Khosrau (1004-1088), whose nom de plume was Hujjat, the first great didactic poet of Persia, was born, according to his own statement, A.H.