ANHINGA. 203 
“The fully adult female (if the sex of several specimens in the British 
Museum is correctly determined) appears to be perfectly similar in 
plumage to the male, the only difference being that the bill is decidedly 
shorter, 79 to 81 mm. In some females, however, which appear to be 
perfectly adult, the black bases of the fore neck and the chest are divided 
on either side from the back by a whitish buff band, as in immature birds. 
“Immature birds—General color as in the adult, but neck much lighter 
and of a pale brownish white, becoming white down the middle of the 
fore neck; black at base of fore neck and chest bordered on each side by 
a whitish buff band; streaks on the upper plumage of a more yellowish 
white, long pointed scapulars absent or half developed; quills and tail- 
feathers pointed and narrowly margined at the tips with pale whitish 
brown; ribs on innermost scapulars and tail-feathers but slightly indi- 
cated; back, rump, and upper tail-coverts brownish black. 
“Young in down.—Head, neck, upper back, and under parts covered 
with white down, amongst which the plumage of the immature is more 
or less visible; quill- and tail-feathers half grown, pointed and narrowly 
margined at the extremity with pale brownish white; scapulars and wing- 
coverts much like those of the adult, but fringed externally with brown. 
Length, 724.” (Grant.) 
“Hxceedingly abundant about Lake Naujan in Mindoro, where it 
breeds. Rarer about fresh-water streams in the interior of that island. 
Not met with by us outside of Mindoro. 
“Always swims with its body entirely immersed, and can remain 
under water an incredibly long time. Flies with difficulty when it first 
rises from water. Makes straight for some good roosting place, preferably 
a stump or log in the edge of the water, where it alights, turns its back to 
the sun, spreads its wings, and remains until thoroughly dry. When dry 
it flies rapidly, and may often be seen during the heat of the day soaring 
at a considerable height.” (Bourns and Worcester MS.) 
“Very abundant on the upper waters of the Rio Grande de Cagayan 
in Isabela Province, and on the upper Agusan River and its lake system 
in Mindanao.” (Worcester.) 
The Indian darter is fairly abundant along the Baco River in Mindoro 
and on the Cagayan River in the vicinity of Aparri, Luzon. Clemens 
collected: specimens on Lake Lanao, Mindanao. 
Family SULIDA. 
Bill stout and pointed, tapering gradually, the tip slightly curved but 
never hooked; a groove along each side of culmen; nostrils completely 
closed in adults; wings long and pointed, first primary longest; tail long 
and wedge shaped; tarsus short and stout; outer and middle toes nearly 
equal; claw of middle toe broad and pectinate. 
