Not at all. No Australian native birds hibernate.
If your budgie is sitting with its head buried in its feathers all day, it is either too cold for the bird, or your budgie is sick.
Yes
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.
when can baby budgies eat on their own
Yes, budgies can certainly imitate whistling sounds.
snakes eat budgies so you better watch out
Yes, lots of people have pet budgies.
The collective noun is a chatter of budgies.
budgies can be different clolours like blue white and yellow
Budgies have very poor sense of smell
Budgies are as smart as a 3 or 5 year old person.