Asian Openbill Stork
Encyclopedia
The Asian Openbill or Asian Openbill Stork, Anastomus oscitans, is a large wading bird in the stork
family Ciconiidae. It is a resident breeder in tropical southern Asia
from India
and Sri Lanka
east to Southeast Asia
.
Asian Openbill Stork is a broad-winged soaring bird, which relies on moving between thermals of hot air for sustained flight. Like all storks, it flies with its neck outstretched. It is relatively small for a stork at 68 cm length. They breed near inland wetlands and build stick nest in trees, typically laying 2-6 eggs
.
Breeding adults are all white except for the black wing flight feather
s, red legs and dull yellow-grey bill. The mandibles do not meet except at the tip, and this gives rise to the species' name. Non-breeding adults have the white of the plumage
replaced by off-white. Young birds have brown tinge to the plumage.
The Asian Openbill Stork, like most of its relatives, walks slowly and steadily on the ground, feeding on molluscs, frog
s and large insect
s.
Stork
Storks are large, long-legged, long-necked wading birds with long, stout bills. They belong to the family Ciconiidae. They are the only family in the biological order Ciconiiformes, which was once much larger and held a number of families....
family Ciconiidae. It is a resident breeder in tropical southern Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...
from India
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
and Sri Lanka
Sri Lanka
Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is a country off the southern coast of the Indian subcontinent. Known until 1972 as Ceylon , Sri Lanka is an island surrounded by the Indian Ocean, the Gulf of Mannar and the Palk Strait, and lies in the vicinity of India and the...
east to Southeast Asia
Southeast Asia
Southeast Asia, South-East Asia, South East Asia or Southeastern Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia. The region lies on the intersection of geological plates, with heavy seismic...
.
Asian Openbill Stork is a broad-winged soaring bird, which relies on moving between thermals of hot air for sustained flight. Like all storks, it flies with its neck outstretched. It is relatively small for a stork at 68 cm length. They breed near inland wetlands and build stick nest in trees, typically laying 2-6 eggs
Egg (biology)
An egg is an organic vessel in which an embryo first begins to develop. In most birds, reptiles, insects, molluscs, fish, and monotremes, an egg is the zygote, resulting from fertilization of the ovum, which is expelled from the body and permitted to develop outside the body until the developing...
.
Breeding adults are all white except for the black wing flight feather
Feather
Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds and some non-avian theropod dinosaurs. They are considered the most complex integumentary structures found in vertebrates, and indeed a premier example of a complex evolutionary novelty. They...
s, red legs and dull yellow-grey bill. The mandibles do not meet except at the tip, and this gives rise to the species' name. Non-breeding adults have the white of the plumage
Plumage
Plumage refers both to the layer of feathers that cover a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage vary between species and subspecies and can also vary between different age classes, sexes, and season. Within species there can also be a...
replaced by off-white. Young birds have brown tinge to the plumage.
The Asian Openbill Stork, like most of its relatives, walks slowly and steadily on the ground, feeding on molluscs, frog
Frog
Frogs are amphibians in the order Anura , formerly referred to as Salientia . Most frogs are characterized by a short body, webbed digits , protruding eyes and the absence of a tail...
s and large insect
Insect
Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...
s.