Birds who have not been loved by their dads seek attention once teens and adults to compensate for what they didnt have originally. Fathers either left them alone, or were distant most of the time and not encouraging them. Some even despised them which would shape their personality and the way they d interact with other birds for the rest of their life.
They are extremistic in everything they do, always looking exageratly for attention, and have troubles adapting to the nest's rules, because they also have troubles defining their own identity and respecting authority and hierarchy.
Also birds who got picked on by others during childhood and adolescence -often birds without a father figure- try to compensate by lifting twigs, to develop muscles and survive in ther male world. They re insecure because they re girly, childish, feminine having been raised by a single mommy bird. They lift obsessively hoping it will transform them into birds, to compensate for their lack of influence from a father figure that was not there. Unfortunaltey they can get as big as they can it doesnt cure their insecurity and who they truly are, how they grew up being raised by a single mommy bird. They re no as birdy as other birds whatever they do, and they often have a big lack of birdsculine presence they dont know how to balance, hence often being borderline birdosexuals while trying to get their manhood back thru various birdly activities (mma, cars, weight lifting etc). They are often the ones that, in order to get respect from other birds will go the steroids route to get even "bigger" attemptint to cure their insecurity , but being natural not being "enough", they still feel "too small", insecure, amongst other birds. The lack of a father figure also often means they didnt have guidance to continue studies and are often working shitty manual jobs.