Hawks were the swiftest birds of prey, smaller than Eagles, but just as sharp-eyed.
Spirits in the shapes of hawks and eagles were the servants of Manwë Súlimo, continually flying over Middle-earth to gather information for their master. Above many flocks of crebain, Aragorn noticed hawks, flying high in the sky, during the War of the Ring.
Christopher Tolkien noted that one of two possible readings for the unintelligible entry PHI in The Etymologies could be "hawk" (the other being "haste"). Carl F. Hostetter and Patrick H. Wynne argue that "hawk" is the more likely reading, especially given the onomatopoeic suitability of the form of the base to the cry of a hawk, and the possible relation to the root PHILIK, "small bird". The Quenya word for "hawk" would then be fion, plural fiondi.
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Quenta Silmarillion: Of the Beginning of Days"
- J.R.R. Tolkien, The Lord of the Rings, The Fellowship of the Ring, "The Ring Goes South"
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", Root PHI
- J.R.R. Tolkien, "Addenda and Corrigenda to the Etymologies — Part Two" (edited by Carl F. Hostetter and Patrick H. Wynne), in Vinyar Tengwar, Number 46, July 2004, p. 9
- J.R.R. Tolkien, "Qenya Noun Structure", in Parma Eldalamberon XXI (edited by Christopher Gilson, Patrick H. Wynne and Arden R. Smith), p. 8