Anhinga

The Anhinga, sometimes known as the snakebird, darter, American darter, or water turkey, is a distinctive water bird inhabiting the warmer parts of the Americas. Its name, derived from the Brazilian Tupi language, translates to "devil bird" or "snake bird," a nod to its serpentine swimming style where only its neck protrudes above the water's surface. The Anhinga is part of the darter family, Anhingidae, and is a close relative to its Indian, African, and Australian counterparts. It is a large bird, with a length of about 89 cm and a wingspan of 1.14 meters, and it is known for its sharp, slender beak used for spearing fish.

Identification Tips

The male Anhinga boasts a glossy black-green plumage with wings and tail of a glossy black-blue, and a distinctive white tail tip. The back of its head and neck feature elongated feathers that are gray or light purple-white, with the upper back and wings adorned with white spots or streaks. The female, on the other hand, has a pale gray-buff to light brown head, neck, and upper chest, with a chestnut lower chest or breast and a back that is browner than the male's. Juveniles are mostly brown until their first breeding season.

Habitat

Anhingas are typically found in warm, shallow waters, where they can be seen swimming with only their necks visible above the surface.

Distribution

The species is widespread, with the American Anhinga divided into two subspecies: A. a. anhinga, found mainly east of the Andes, and A. a. leucogaster, located in the southern United States, Mexico, and some Caribbean islands. Migration patterns are influenced by temperature and sunlight, with birds moving towards the equator during winter.

Behaviour

Anhingas are adept swimmers, using their webbed feet to pursue prey underwater. They spear fish with their sharp beaks and are known for their unique drying behavior, where they spread their wings to dry their non-waterproof feathers and absorb heat, often standing in a posture that resembles a male turkey.

Similar Species

The Anhinga is often mistaken for the double-crested cormorant due to its size and shape. However, it can be distinguished by its longer and wider tail and sharply pointed bill, as opposed to the cormorant's shorter tail and hook-tipped bill.

Diet and Feeding

Anhingas feed on a variety of aquatic prey, including fish, amphibians, invertebrates, and insects. They are skilled hunters, stalking fish underwater and spearing them with their beaks. Larger fish are repeatedly stabbed and then released, while smaller catches are brought to the surface and swallowed head-first.

Conservation status

The Anhinga is protected under the Migratory Bird Treaty Act of 1918 in the United States. With a vast global range and frequent occurrence, the species is classified as Least Concern by the IUCN Red List.