122 BRITISH GUYANA BIRDS EGGS. 
the bird itself is plentiful. They make a flat nest of sticks 
on the ground, or inside hollow trees, especially the 
hollow stem of the cabbage-palm: one nest was found 
inside the withered body of a dead cow. 
They lay two eggs. 
The egg —77 mm. by 50 mm. —is greenish white, 
marked with dark brown or light brown, large and 
small spots: the large spots form a ring round the egg 
near its large end. 
They hatch in January, February and March. — One 
egg (N°. 41). 
This vulture is called red-headed to distinguish it from 
the black-headed variety, but its head is not always red, 
as frequently they are seen with the head a dirty grey, 
especially on a wet day. 
16. Cathartes atratus (Bartram). 
Black-headed Carrion Crow. 
They build a flat nest of sticks on the ground at the 
foot of some tree, or inside hollow trees, either forest-trees 
or palms, or among the dry leaves of the sugar-cane where 
these are left between the rows of growing canes. 
They lay two eggs. 
The egg — 65 mm. by 45 mm. — is brownish white, 
marked with dark, dirty brown spots. There is one large 
splash of the same colour on one side of the egg near its 
large end. . 
They hatch in January, February and March. — One 
egg (N°. 40). 
17. Ardea agami Gm. 
King of the Herons. 
Their nests are flat and composed of sticks. They build, 
in colonies along with the other small herons, on low 
trees. Some years ago they were in the habit of building 
in the young Courida-trees, Avicennia nitida, along the 
Notes from the Leyden Museum, Vol. XV. 
