No, cockatiels should only be housed with other cockatiels. Not only do other types of birds have different types of diets, but they also have different personalities and will sometimes clash with cockatiels.
It's not asafe to put finches in with cockatiels. Unless its an aviary, you want to keep hook-beaked and straight-beaked birds apart
In their native habitat, cockatiels do flock with other cockatiels. This is a natural behaviour which is primarily for defence against larger birds of prey.
Cockatiels can eat crackers, except they make them put on weight. They have no nutritional content in crackers for cockatiels. Despite the movies where birds eat crackers, cockatiels eat vegetables and seeds (as a treat). Your cockatiel should eat everything in moderation. As for crackers, as an occasional treat - cockatiels love them!
I'm pretty sure that cockatiels should be about 18-24 months when they start to breed. In other words, cockatiels mate after they age about a year or two.
they are not satisfied with it put another one and wait
yes
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.
Yes, cockatiels can get parasites.
Cockatiels are a type of cockatoo.
Before they have been weaned, cockatiels can eat wheat-bix and other soft foods. After they are weaned, cockatiels can eat anything that adult cockatiels eat. Cockatiels love lettuce! (Not too much - it acts as a laxative in large amounts). Your cockatiel will also enjoy carrot and brocolli. DO NOT FEED YOUR COCKATIEL AVOCADO OR TOMATO!
Cockatiels are parrots, and members of the cockatoofamily.