Median Egret, வெள்ளைக்கொக்கு

Common name: Median Egret
Scientific name:  Mesophoyx intermedia

Photo credit: Manoj Kumar

Photo shot at: Backyard of Cauvery hostel, BDU. 

This species, as its scientific name implies, is intermediate in size between the Great Egret and smaller white egrets like the Little Egret and Cattle Egret, though nearer to Little than Great. It is about 56–72 cm (22–28 in) long with a 105–115 cm (41–45 in) wingspan and weighs c.400g (14 oz), with all-white plumage, generally dark legs and a thickish yellow bill. Breeding birds may have a reddish or black bill, greenish yellow gape skin, loose filamentous plumes on their breast and back, and dull yellow or pink on their upper legs (regional variations). The sexes are similar.

Differences from Great Egret:

The non-breeding colours are similar, but the Intermediate is smaller, with neck length a little less than body length, a slightly domed head, and a shorter, thicker bill. The Great Egret has a noticeable kink near the middle of its neck, and the top of its longer bill nearly aligns with the flat top of its head. Close up, the bare skin of the Great Egret's gape line extends in a dagger shape behind the eye, while the Intermediate's is less pointed and ends below the eye. The Intermediate tends to stalk upright with neck extended forward. The Great is more patient, often adopting a sideways-leaning "one-eyed" stance.Differences from Little Egret.Little Egrets have yellow-soled feet and black bills. They often run after fish in shallow water. Breeding birds have long nuptial plumes on the back of their heads.