Jacana : long-legged water birds

 The jacana is a family of colorful and long-legged water birds hailing from the tropical wetlands around the world. There are eight documented species, plus four more extinct species known from the fossil record. Collectively, they are part of an order that includes waders, gulls, and auks. 

                                         

           

Jacana Facts

• The wattled jacana of South America shares a fascinating mutual relationship with the capybara by picking the ticks directly off its body.
• Most species of jacanas have a short or non-existent tail, but the pheasant-tailed jacana is an interesting exception.
• This aptly named bird has an elongated tail that grows only in the breeding season.
• The African jacana sometimes undergoes temporary molting periods in which it cannot fly at all.

                                        

wattled jacana of South America

                                            

capybara 

Where to Find the Jacana

The jacana can be found in warm tropical locations all over the world, including Africa, southern Asia, Australia, Mexico and Central America, and South America. It also sometimes wanders as far north as the United States. They are specifically adapted to life in swamps, marshes, lagoons, and shallow lakes.

Jacana Nests

The female constructs a simple nest from the available plant material on floating islands.

                                            

  

Scientific Name

The scientific name of the jacana family is Jacanidae. This is derived from the name of the bird. The eight known species are divided into six different genera.

                                  

Size, Appearance, and Behavior

There are eight known species of jacana.

The jacana is a medium-sized bird, measuring anywhere between six and 12 inches tall. The most prominent feature to aid with identification is the long, spindly legs (the feet, toes, and claws look a bit like twigs and branches). These birds come in all manner of different colors, including brown, cinnamon, white, and black, sometimes accompanied by yellow or green flight feathers. Females can measure up to twice the size of the males, but their plumage is otherwise almost identical, making identification somewhat difficult. Some species also have little red wattles or crowns near the beak.

The jacana is very well-adapted for the wetland ecosystem in which it lives. Their long legs and feet enable them to walk across lily pads and other floating vegetation without sinking. When threatened by a predator, they can stay underwater for long periods with the bill sticking above the surface to properly breathe. While they aren’t capable of long, sustained, powerful flights, they do glide gently for short distances over the surface of the water. The feathers also provide insulation to keep the bird warm and comfortable.

The jacana’s social system appears to be fairly basic. They complete much of their foraging and hunting alone, but they do come together for breeding. These are also highly noisy birds that make a variety of different calls. Whether soothing a chick or spotting a predator, its verbal repertoire includes squeaks, whistles, cackles, coos, and twitters.

Diet

The jacana is an omnivore, though much of what it consumes is meat.

What does the jacana eat?

The jacana feeds mostly on small insects. It supplements this with snails, worms, crabs, fish, mollusks, and seeds. They use their beaks, toes, and claws to turn over aquatic vegetation in search of food.

Predators, Threats, and Conservation Status

Seven of the eight species are classified by the IUCN Red List as least concern. Only the Madagascar jacana is endangered. The greatest threat is the loss of its natural wetland habitat to agriculture and livestock. Wetlands are some of the most vulnerable ecosystems on the planet.

What eats the jacana?

This bird is preyed upon by otters, turtles, crocodiles, snakes, birds of prey, and large fish. As mentioned previously, these birds can run away or hide underwater upon sensing danger. The wattled jacana of the Americas also has sharp claws or spurs on the elbow wing to provide extra defense, and the bare, fleshy area on the front of the body may reflect light to provide camouflage.

Reproduction, Young, and Molting

One of the most fascinating facts about the jacana is that it has evolved a polyandrous breeding relationship in which the female keeps multiple mates at a time rather than the opposite. Only the lesser jacana forms entirely monogamous breeding pairs. After mating, the female will produce a clutch of three or four eggs at a time. These glossy eggs have complex markings to help keep them safe and camouflaged among the vegetation. The father then assumes much of the responsibility of care, literally taking the eggs under his wing to keep them warm, while the female will often choose to mate again with another male to prepare the way for a new brood.