blencher

from The Century Dictionary.

• noun A scarecrow, or whatever frightens or turns aside or away.
• noun In hunting, one placed where he can turn the deer from going in a particular direction; a blancher.
• noun One who blenches or flinches.

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete One who, or that which, scares another; specifically, a person stationed to prevent the escape of the deer, at a hunt. See blancher.
• noun One who blenches, flinches, or shrinks back.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun obsolete One who, or that which, scares another; specifically, a person stationed to prevent the escape of the deer during a hunt.
• noun obsolete One who flinches or shrinks back.