On the parakeet is a colored patch above the beak (cere); in males light to dark blue and female pinkish to tan, or brown if breeding; immature of both sexes are pinkish to pinkish blue.
Probably when they are very affectionate with one another or you have baby parakeets.
to tell you look at there nostrill if it is blue or purple
female
Maybe
sometimes
Depends on the male if it usually goes in the nest then yes
The female and male parakeet do a cloaca kiss and make a baby bird deedadee
you can leave them together all the time
Female parakeet may be aggressive and sighted the bird as a territory threat or vice-versa. Female birds become anxious if they have eggs
I don't think so. I read that adult female parakeets noses are brown and that adult male parakeets noses are blue. But, young female parakeet's noses are "bluish" and a young male parakeet's nose is pink.
Talk about your serious, Erection
By the way it's spelled parakeet not "parakett" anyway the way you can tell is by the breathing holes, if it is blue then he's a male if it is any other color then she is a female. That is all to know.