1760  [They fare best towards Gabarus, where there is plenty of game, and where the woodcocks are so extremely tame, that you may knock them down with stones.]
1872  (1873)  The spruce partridge or fool hen, that is oftener knocked over with a stick than shot.
1921  ". . . They are fool hens--Franklin's grouse--and that means that they'll set all day and let you pepper at 'em. . . ."
1956  The fool hen, a kind of grouse, was so called because it would sit quite still while a hunter came up close with a long thin stick on the end of which was a noose of fine sinew. This noose he would slip gently over the sitting fool hen's neck and pull the bird down.
1965  It wasn't the least bit like grabbing a fluttering fool hen.