This is a simple pictorial list of the 25 commonest birds (in my opinion) that one is likely to see in urban Bombay. In greener areas like IIT and the Borivali National Park, one is obviously likely to see many more species. Pictures are from Wikipedia and each species has a link to the relevant Wikipedia page for further information.
Size: Sparrow 15± cm.
Associated Colours: black, chestnut, white
more info... WikipediaSize: Pigeon 33± cm.
Associated Colours: black, glistening purple and green
more info... WikipediaSize: Kite 61± cm.
Associated Colours: single colour
more info... WikipediaSize: Myna 23± cm.
Predominantly: black, grass green, rose
Associated Colours: black (pink in male), rose
Tail: 23 cm.
more info... WikipediaSize: Bulbul 20± cm.
Predominantly: brown, white
Associated Colours: black, red, white
more info... WikipediaSize: Bulbul 20± cm.
Associated Colours: red, white
more info... WikipediaSize: Myna 23± cm.
Associated Colours: white (wing patch)
more info... WikipediaSize: Crow 43± cm.
Predominantly: black (male), brown (female)
Tail: 20 cm.
more info... WikipediaSize: Sparrow 15± cm.
Predominantly: crimson, green, purplish, yellow
Associated Colours: green, metallic crimson, purple, yellow
Bill: 2.5 cm.; curved, black
more info... WikipediaSize: Sparrow 15± cm.
Predominantly: olive green, white
Associated Colours: rusty red, white
Tail: 4-8 cm.
more info... WikipediaSize: Village Hen 46-76± cm.
Predominantly: earthy brown, white
Associated Colours: white
Bill: 6 cm.; straight, pointed, brown and yellow, greenish yellow, blue at base
Legs: dull green
more info... WikipediaSize: Village Hen 46-76± cm.
Predominantly: white
Bill: 10 cm.; straight, pointed, black
Legs: black
more info... WikipediaSize: Sparrow 15± cm.
Associated Colours: white
more info... WikipediaSize: Pigeon 33± cm.
Predominantly: black, grass green, maroon, pink
Associated Colours: black, maroon, pink
Tail: 36 cm.
more info... WikipediaSize: Bulbul 20± cm.
Predominantly: black
Tail: 17 cm.
more info... WikipediaSize: Myna 23± cm.
Predominantly: blue, brown, chocolate, white
Associated Colours: blue, chocolate brown, white
Bill: 7.5 cm.; straight, pointed, red
more info... WikipediaSize: Sparrow 15± cm.
Predominantly: green, rusty
Associated Colours: black, rusty brown
Bill: 3 cm.; curved, slender, brownish black
Tail: 14 cm.
more info... WikipediaSize: Bulbul 20± cm.
Associated Colours: black, grey
more info... WikipediaSize: Partridge 33± cm.
Predominantly: bronze brown
Associated Colours: red lappets, white
Bill: orange red and black
Legs: yellow
more info... WikipediaSize: Bulbul 20± cm.
Predominantly: black on head (adult male), chestnut, chestnut (immature), white, white (adult male)
Tail: 20 cm.
more info... Wikipedia