Light and the gonadal cycle of the black-headed Munia, Munia malacca malacca.
D000818:Animals; D001717:Birds / Q000502:physiology*; D008027:Light; D008297:Male; D012621:Seasons; D013094:Spermatozoa; D013737:Testis / Q000254:growth & development*; D013961:Thyroid Gland; D013997:Time Factors