muticus) which were more or less widely distributed until 70 or 80 years ago, have virtually disappeared from Bangladesh.
Ornithology in the Indian Subcontinent' The sources of information regarding Indian birds of the pre-Mughal period are not very revealing.
Birds appeared more than 150 million years ago during the Jurassic period.
They are often considered feathered dinosaurs; this realisation arose as a result of the discovery (in Bavaria, southern Germany in 1861) of the fossil of the oldest known bird, Archaeopteryx lithographica.
Some names are based on calls, others are based on colouration, habits, gait, method of feeding, and so on.
Some names are identifiable easily enough, while others are obscure.Birds possess 2 major anatomical adaptations: feathers, probably evolved from reptilian scales, which provide an insulating coat and give them the ability to maintain a constant body temperature; and considerably modified forelimbs, from the five-fingered form of their probable reptilian ancestors to a wing covered with specially adapted feathers, which give birds the power of flight.Today the class Aves consists of approximately 9,000 species, grouped into 24 orders.Birds associated with forests of some sort or with a swampy habitat have declined, and their places taken over by other birds.The Pinkheaded Duck (Rhodonessa caryophyllacea), the Nukta or Comb Duck (Sarkidiornis melanotos), the Common Peafowl (Pavo cristatus), and the Burmese Peafowl (P.Bird (pakhi) warm-blooded, egg-laying, vertebrate animal of class Aves having its body covered with feathers and forelimbs modified into wings.They have a relatively large brain, keen sight, and acute hearing, but little sense of smell.The result was the pioneering work of Brian Hodgson, TC Jerdon and Edward Blyth.But scientific ornithology, more or less as understood today may, for practical purposes, be said to commence with the publication of the two volumes of Jerdon’s classic Birds of India between 18.The Mughal Emperors, at least from Babur to Shah Jahan, were renowned athletes and lovers of Nature in all its forms.Among them the two most outstanding naturalists were Babur and his great grandson Jahangir.