Budgies normally sleep on one leg with their head tucked under their wing, standing up!
Most budgies will sleep at a certain part of a cage. If you have one of those small swing perches they might sleep there every night. It is nothing to worry about.
This is rare behaviour, but not completely unknown. Usually they sit on their perch.
they close thier eyes but they in fact do not sleep
This question is a matter of opinion. Some people like English budgies better than regular budgies or other people like regular budgies better than English budgies.
Yes, budgies are parakeets.
Budgies are parakeets. They eat seed
Yes, they're called gay budgies, ey.
Yes, budgies can certainly imitate whistling sounds.
when can baby budgies eat on their own
snakes eat budgies so you better watch out
Yes, lots of people have pet budgies.
The collective noun is a chatter of budgies.