Generally, no - parrot species cannot interbreed, with the exception of macaws in the Arinae sub-family.
However, macaws are neither cockatoos, nor cockatiels, as the question asks.
There have been instances of cockatiels cross breeding with galahs, which are small members of the cockatoo family. If the question refers to the cross-breeding of cockatiels and the sulphur-crested cockatoo, commonly kept as a pet, then to date, no such hybrid has been produced.
See the related link below for an article on the dubious practice of breeding hybrid parrots.
No, They cannot.
They can not be fertile and get pregnant the way a female can.
It must be noted that no bird, parrot or otherwise, gets pregnant. Birds are egg-layers, and do not have a "pregnancy" in the usual understanding of the word. Even while the egg is developing in the female bird's body, prior to being laid, it is not termed "pregnancy".
No cockteils and parakeets have different genetic makeups and cannot reproduce together.
There is no such thing as the biggest cockatiel beacause all cockatiel are small but cockatiels are from the cockatoo family, so its relative ( the cockatoo) will be the biggest.
The average weight of a cockatiel is 93 grams.
The Cockatiel (Nymphicus hollandicus) is indigenous to Australia and is a popular pet cockatoo variety.
Yes, they can and my favorite type is a mix between the cockatiel and the galah cockatoo, it makes a beautiful bird!
Cocktails or cockatiels? If the writer meant cockatiel or cockatoo - the answer is no! Salt can be toxic to either of these birds!
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".
The oldest living cockatiel died at the age of 36.
Cockatiels do not need anything to have a mate. Just put him/her in the cage with your cockatiel, however, if you want them to mate, they will not mate if you do not have a nesting box. In order to breed cockatiels, you will need a nesting box.
A budgie, a cockatiel, a lovebird, a sun conure, and an African grey. I think you can get a rose-breasted cockatoo (Galah), but I'm not quite sure.
No way. They are both different species, and completely different sizes.
Yes galahs and sulphur crested cockatoos are known to mate
small parrots (parakeet, parrollet) a parakeet mix. medium (conures, cockatiels, love birds)cockatiel mix larger (cockatoo, macaws) a large parrot mix