Little Cormorant

The little cormorant is about 50 centimetres (20 in) long and only slightly smaller than the Indian cormorant (Phalacrocorax fuscicollis). The Indian cormorant has a narrower and longer bill which ends in a prominent hook tip, blue iris and a more pointed head profile. The breeding adult bird has a glistening all black plumage with some white spots and filoplumes on the face. There is also a short crest on the back of the head. The eyes, gular skin and face are dark. In the non-breeding bird or juvenile, the plumage is brownish and the bill and gular skin can appear more fleshy. The crest becomes inconspicuous and a small and well-marked white patch on the throat is sometimes visible. Towards the west of the Indus River valley, its range can overlap with vagrant pygmy cormorants (Microcarbo pygmaeus), which can be difficult to differentiate in the field and are sometimes even considered conspecific. The sexes are indistinguishable in the field, but males tend to be larger. Some abnormal silvery-grey plumages have been described. The species was described by Vieillot in 1817 as Hydrocorax niger. The genus Hydrocorax literally means water crow. It was later included with the other cormorants in the genus Phalacrocorax but some studies place the smaller "microcormorants" under the genus Microcarbo.

The little cormorant is found across India, Sri Lanka, Bangladesh, Pakistan and lowland Nepal. It is also found in parts of Myanmar, Thailand, Laos, Cambodia and Indonesia. It is not found in the Himalayas, but vagrants have been seen in Ladakh. It inhabits wetlands, ranging from small village ponds to large lakes, and sometimes tidal estuaries.

Little cormorants tend to forage mainly in small loose groups and are often seen foraging alone. They swim underwater to capture their prey, mainly fish. A study in northern India found that the little cormorant fished in water which was less than a metre deep and captured fishes of about 2–8 centimetres (0.79–3.15 in) length. They propel themselves underwater using their webbed feet. Captured fishes are often brought up to the surface to swallow them and during this time other birds including other little cormorants, painted storks, gulls and egrets may attempt to steal them. Indian cormorants tend to fish communally in larger groups. Like all other cormorants, they will emerge from water and will hold out their wings and stay immobile for a while. The behaviour has been suggested to be for wing-drying, but this interpretation is debated. A study in Sri Lanka found that the time spent with spread wings was always after they had spent some time underwater, and that the duration was related to time spent underwater and inversely related to the temperature and dryness of air. These observations support the theory that the studied behaviour aids drying of the wings.

The breeding season of the little cormorant is between July and September in Pakistan and northern India and between November and February in southern India. In Sri Lanka it is December to May. …