In dog ethology the leader is called 'alpha'; after that it continues with 'beta' and 'gamma'.
インコやオウムと仲良く楽しく健やかに暮らすために、飼鳥の行動学やペットロスについて考える。
In order to live happily and healthily with parakeets or parrots, you should understand the science of animal behavior for domesticated birds, and consider the emotional effect of losing them eventually.