Female budgies have a brown beak. Male budgies have a blue beak
any colour
not sure butif you do get budgies dont put a a male and a male and a female together one male will eat the male then it will eat the female and then it will eat the eggs and then it will die.
I don't think that is true. It's like saying a blonde is dumb, but they aren't. But female budgies are more aggressive than males.
you see which one is a darker green if its darker its female and lighter is male.
they shouldn't fight. if male and female fight, there is a problem.
If it is a female the belly is darker
Male budgies tend to speak better then females. Although don't count the females out, some can learn to talk and females are also very good whistlers!
This is typical pre-nesting behaviour. The budgies, in particular the female, are preparing the nesting box for nesting. Some pairs of budgies never successfully breed, but they still display all the signs and behaviour of wanting to nest.
male-blue, grey, black, white female-green, yellow, black, white
It depends on the behavior of your budgies. If they are aggressive or like to stick around by the 2 mating budgies, I would suggest separate them because the female won't be comfortable with the distraction of the other 2 budgies. However, if the other 2 rarely come by the 2 mating budgies or completely ignore them, I suggest keep the two there.
If the brown area is restricted to the cere, this is normal, as it indicates a female that is ready to bed. If it is a crusty discharge, the budgie is suffering from a respiratory infection, and must be taken to a vet.