Beta's in the animal kingdom means 2nd in command
Alpha (ethology) - Wikipedia
Beta animals often act as
second-in-command to the reigning alpha or alphas and will act as new alpha animals if an alpha dies or is otherwise no longer considered an alpha.
In some species of birds, males pair up in twos when courting, the beta male aiding the alpha male. It has been found that the social context of the animals has a significant impact on courtship behavior and the overall reproductive success of that animal.
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