Not necessarily. Both males and females can have yellow tails.
There is also an urban myth that males have striped/barred or spotted tails and females do not. There is no evidence to substantiate this. There seems to be more evidence to support the contrary theory, that males have a solid slate grey underside to their tail, while females have a barred or mottled underside. However, it need to be noted that, with the many variations that have been bred into cockatiels since they became popular aviary birds, both males and females can have variegated tail feathers. Reputable bird identification websites will show that this is not always the case.
No. not neccessarily. Male cockatiels usually are more vocal than females so start with that. If you still can not determine the sex. Look to see if he/she has lots of yellow around the face. If there is alot of yellow they are usually male. Then there the tail thing. Usually alot of the feathers will have the stripes but not all. If you still dont know, i suggest you take it to a vet and have it sexed.
Young grey cockatiels will usually get yellow wing and tail feathers, and coloured cheek patches as they mature.
It is probably a male, as the males have bright colors and is much more colorful than the female.look at his/her tale to see if there is bars across it, and if it mimics or talks its most likely a malee. but the way you described your cockatiel it sounds like a male with the yellow and red cheeks. :)
Yes. Your female cockatiel may lay an egg however without a male it will not be fertilised and therefore a dud.
This does not mean anything. Some sites will claim this is an indication of whether the bird is male or female, but the presence of spots has nothing to do with its gender.
FEMALE
A male finch can't really live with a female cockatiel as you should not mix straight-beaked and hooked-beak birds.
mine has a yellow+black spotty tail but they can be practicly any color
i need help with this question
You cannot. A female cockatiel needs a male cockatiel to mate with her before she will produce fertile eggs. And incidentally, birds do not "fall pregnant".
Yellow-tail was created in 1775.
Yes, that's how you get more cockatiels.