stake-driver

from The Century Dictionary.

• noun The American bittern, Botaurus mugitans or lentiginosus: so called from its cry, which is likened to driving a stake into the ground with a mallet. Also pile-driver, pump-thunder, thunder-pumper, etc.

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

• noun (Zoöl.) The common American bittern (Botaurus lentiginosus); -- so called because one of its notes resembles the sound made in driving a stake into the mud. Called also meadow hen, and Indian hen.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a kind of bittern