the world > animals > mammals > group Ungulata (hoofed) > group Ruminantia (sheep, goats, cows, etc.) > bos taurus or ox > [noun] > sound made by > making sound
1844 W. M. Thackeray i A huge penful of Durham oxen..maintain an incessant mooing and bellowing.
1888 Apr. 738 The mooing of the waters seemed to deepen.
1986 J. Bauman viii. 175 I stay in bed and listen to the mooing and squawking.