vortiegg.blogg.se - Shoebill stork diet

With stiltlike legs and splayed feet, the shoebill can wade in shallow water, or stand on floating vegetation, ready to strike with its extraordinary bill.Īt 20″ long, the hamerkop (Scopus umbretta) is dwarfed by the shoebill. Usually quiet, the bird defends its nest with vigor, clapping its bill loudly and even leaping onto the back of an intruding shoebill. This heavy bird is, however, a reluctant flier because it depends on thermals (warm air currents) on which to soar: In flight it-draws its neck back, pelican-style, to bring the mighty bill closer to the body’s center of gravity. The shoebill is sometimes forced by droughts to seek new food sources. Even breeding pairs seldom feed alongside each other each one’s territory may extend a few miles. The shoebill has a solitary, sedentary nature. The messy hunter skillfully empties water and plant matter from its bill while keeping a firm grip on the prize.Īfter a successful strike, the shoebill takes a drink and then moves to another undisturbed site. The bird attacks a catfish in a stand of reeds, toppling forward as it thrusts out its bill. When the shoebill hunts, it uses various tactics: periods spent standing motionless alternate with a stealthy stalk. Normally only one juvenile fledges from each brood.īoth parents incubate the eggs and rear the young.

Each juvenile leaves the nest at 13 weeks, but still cannot fly and relies on its parents for another few weeks. The chicks learn to handle fish and eat them head first. The parents dutifully tend their silvery-gray, downy hatchlings, supplying them with prechewed fish and dousing them with billfulls of cooling water on hot days. Although breeding pairs may nest close to one another they never form a social colony. The breeding pair continually adds fresh plant material to the nest, which may become so heavy that it sinks slowly into the marsh. The shoebill lays two or three chalky-white eggs on a bulky mound of aquatic plants trampled on floating marshy vegetation. By mating in the dry season, the shoebill ensures its young a supply of lungfish, which are trapped in dwindling pools. The shoebill adapts its breeding behavior to suit the movements of floodwaters. Fishermen disturb the bird during its breeding season, and juveniles are illegally collected for zoos. Cattle farmers are burning marshes, using the land for their stock. The population is thought to be about 11,000, with roughly half occurring in the Sudd.This region is being drained, along with other wetlands, to create land for crop production. The IUCN (World Conservation Union) has declared the shoebill a species of special concern because of its restricted range in Africa and poorly understood biology. Their method is spectacular but often unsuccessful, obliging the bird to move a few yards and try again. Shoebills may fish near each other, but do not hunt communally. Food & huntingįish dominate the shoebill’s diet it also hunts frogs, lizards, turtles and snakes, as well as the odd waterbird or young crocodile.įeeding starts by late morning. The shoebill shares with the storks the habit of defecating on its legs on hot days.

The shoebill follows the sitatunga, an aquatic antelope it stirs up lungfish, the bird’s favorite food, as it walks.

The shoebill is found in marshes and swamps. It is often most numerous in areas where the water has a low oxygen level - lungfish, a favorite food, then must surface more often, making the shoebill’s foraging a lot easier The bird uses this vegetation for nesting material and to conceal its vast shadow from the fish below. In Uganda, the shoebill is found on marshy lake margins thick with reeds, papyrus and grasses. The bird is most often seen in flooded regions where the deep, sluggish waters carry large quantities of fish toward the great lakes of Victoria and Tanganyika. In northeastern Africa, the shoebill frequents the Sudd, a 52,000-sq. Its mighty bill is a specialized weapon for hunting in the water. Although given to nesting in remote spots, the shoebill is one of the most distinctive birds of African wetlands.