it is either morphological or plylogenetic. I am leaning more to the morphological side.

Depends on species and gender.

One bird described as "bald" because of the white feathers on its head is the American Bald Eagle, a protected species that is the official bird of the nation as a whole.

The bird described is a coot. There are 12 extant (living) species of coot.

Around 1.7 million species are currently described by science, however it is believed that there are at least 5 - 7 million more species that are as yet undocumented.