Flightless bird cassowary is found in
A. Australia
B. New zealand
C. Indonesia
D. Mauritius

Hint: Cassowaries feed mainly on fruit, even if all species are truly omnivorous and will take a range of other plant food, including shoots and grass seeds, as well to fungi, invertebrates, and small vertebrates. Cassowaries are very suspicious of humans, but if provoked they are capable of inflicting serious, even fatal, injuries to both dogs and people. The cassowary has often been labeled the world's most dangerous bird.

Complete Answer:
- Cassowaries genus Casuarius, are ratites that is flightless birds devoid of a keel on their sternum bone, that are native to the tropical forests of New Guinea (Papua New Guinea and Indonesia), East Nusa Tenggara, the Maluku Islands, and northeastern Australia.
- There are about three in existence species. The most common of these are the southern cassowary. It is the third-tallest and second-heaviest living bird, and which is smaller only than the ostrich and emu.
- Cassowaries are part of the ratite group, which also includes the emu, rheas, ostriches, and kiwi, in addition to the extinct moas and elephant birds. Three in existence species are recognized, and one destroyed. Characteristically, all cassowaries are shy birds that are found in the deep forest. They are skillful at disappearing long before a human knows they were there.
- Females are larger and more intensely colored than the males. Adult southern cassowaries are 1.5 to 1.8 m (5–6 ft) tall, Even if some females may reach 2 m (6.6 ft), and weigh 58.5 kg (130 lb).
- All cassowaries encompass feathers that consist of a shaft and loose barbules. They do not have tail feathers or a preen gland. Cassowaries comprise small wings with 5–6 large remnants. These are condensed to stiff, keratinous quills, resembling porcupine quills, with no barbs.
- A claw exists on each subsequent digit of the feet. The furcula and coracoid deteriorate, and their palatal bones and sphenoid bones touch each other. These, along with their wedge-shaped body, are thought to be adaptations to ward off vines, thorns, and saw-edged leaves, allowing them to run speedily through the rainforest.

So the correct answer for this question is option A: Australia.

Note: The genus Casuarius was erected by the French scientist Mathurin Jacques Brisson in his Ornithologie which was published in 1760. The kind species is the southern cassowary . The Swedish naturalist Carl Linnaeus introduced the genus Casuarius in the sixth edition of his Systema Naturae published in 1748. But Linnaeus dropped the genus in the imperative tenth edition of 1758 and put the southern cassowary cooperatively with the common ostrich and the greater rhea in the genus Struthio.