We know from Big Bird’s extended family that his species has a wide spread of individual variation, and given that none of them reside in the wild none of them are likely to suffer predation due to what would otherwise be a mal-adaptation, providing a springboard for even more genetic variation from generation to generation.
Just look at how wildly different looking specific humans can be from one another, even within a single community.
We know from Big Bird’s extended family that his species has a wide spread of individual variation, and given that none of them reside in the wild none of them are likely to suffer predation due to what would otherwise be a mal-adaptation, providing a springboard for even more genetic variation from generation to generation.
Just look at how wildly different looking specific humans can be from one another, even within a single community.