See quotation 1792.
1784. We saw the culheags, or log-traps, which the hunters set for sables.Jeremy Belknap, Tour of the White Mountains (1876), p. 13. (N.E.D.)
1792. The culheag, or log-trap, is used for taking wolves, bears, and martins. [A description follows.]The same, New Hampshire, iii. 90.