Darter Or Snakebird Anhinga In Flight. Stock Photography

Darters are large birds with sexually dimorphic plumage. They measure about 80 to 100 cm 2.6 to 3.3 ft in length, with a wingspan around 120 cm 3.9 ft, and weigh some 1,050 to 1,350 grams 37 to 48 oz. The males have black and dark-brown plumage, a short erectile crest on the nape and a larger bill than the female. The females have much paler plumage, especially on the neck and underparts, and are a bit larger overall. Both have grey stippling on long scapulars and upper wing coverts. The sharply pointed bill has serrated edges, a desmognathous palate and no external nostrils. The darters have completely webbed feet, and their legs are short and set far back on the body.