Why does a pigeon have an exoskeleton?

Do cormorants stay in UK over winter? What is the most popular vulture and why? How long is a Parrot's life span? Where does the Hawaiian Myna bird nest? You have small lumps on the back of your head and there are bald patches round them? Why do penguins not like bread? Do camels bury their head in the sand to counter the wind in the desert? How often do you clean your nest-box? What does it mean if your necklace is upside down? Does a lion eat a parrot? What does a female Pheasant look like? Is zipper a two syllable word? What is a girl Turkey called? Did the French word poulet get created because chicken is poultry? Can pet birds eat carrots? What is another word for a drupe? How any times does a great blue heron wing beat his wings per second? Do eagles have a nucleus? How many times does a eagle flap its per hour per min? How long will it be before yellow warbler eggs hatch?