Crest (feathers)

[3] The recumbent crest has feathers that are straight and lie down essentially flat on the head until the bird fans them out to where they stand up.

[3] The recursive crest is noticeable even when it is not fanned out because it features feathers, that, when lying down, curve upward at the tips, and when standing up, often bend slightly forward toward the front of the head.

Crest feathers in domestic birds include a wide range of variations in form across species.

The underlying molecular and genetic mechanisms that are responsible for crest feather formation in domesticated bird species are not well understood.

As such, crest feathers are widely studied in morphological research and other related biological disciplines, particularly concerning domesticated species.