A Harpy or Siren depending on what you mean. Harpies don't have beautiful singing voices, but Sirens do.
This creature could be inspired by the legend of the harpy, a winged creature from Greek mythology with the body of a bird and the head of a woman. Harpies are often depicted as vicious and cruel beings who would snatch and torment humans. Their hybrid form is meant to symbolize a disturbing blend of animal and human traits, evoking primal fears associated with the unnatural.
Harpy or Siren
or a Sphinx (like the one who asked tricky riddles in Ancient Greece, not like the Egyptian one).
a harpy
Callapus
Head of a woman and body of a bird? I believe you happen to mean a hagraven or a harpy.
a harpy
The Sphinx
Siren
Lamia...body of a serpent...breasts and head of a woman
Possibly the Egyptian Hawk-God Horus, identified with Time.
A mallard is a bird that has an iridescent green head and brown on the body. The ring necked pheasant is another bird with a brown body, and an iridescent green head.
THE SPHINX (or Phix) was a female monster with the body of a lion, the breast and head of a woman, eagle's wings and, according to some, a serpent-headed tail
a hippogriff
love bird
Blue bird