This note
covers the following topics: Introduction to Birds, Bird Flight, The Geography
of Birds, Urinary System, Salt Glands, and Osmoregulation, Circulatory System,
Respiratory System , Nervous System, Mating Systems and Avian Reproduction.
This note covers the following topics related to Ornithology: What roles
have birds played in human history, How diverse are birds, basic features of
birds and how they have been influenced by flight.