" (Warning: You can get into something of a tangle with these birds. Many people use the words sparrowhawk and kestrel interchangeably, but kestrels, Eurasian or American, are all falcons, while not all sparrowhawks are kestrels, or vice versa. You see what I mean? I am only sorry we lost the beautiful British name windhover. But we have G. M. Hopkins’s poem.) "

― Ursula K. Le Guin , No Time to Spare: Thinking About What Matters