https://ijvst.um.ac.ir/article_46924.html
Changes in the Uropygial (preen) gland in Fulani ecotype chicken (gallus gallus domestica) a...
The Uropygial (Preen) gland, located dorsocranially to the pygostyle and rectrices in birds, is a bi-lobed structure responsible for secreting oil for plumage...
in thepreen glandchangesuropygialfulani