The lark’s head is a simple knot that is useful on its own and as a component of many larger ties.
The lark’s head is a great way to tie a doubled rope to a bedpost or to add a new rope to a harness.
It’s also the starting point for many reverse tension cuffs.
There are numerous clever ways to tie the lark’s head in special situations: one handed, onto a ring, onto a pole if the end is accessible, etc.
1Pass the bight over and around the pole.
2Go through the bight.
3Snug the knot.
This knot is ABOK # 1673 (Cow Hitch)
Ashley would like us to remind you that all true Englishmen refer to this knot as a cow hitch: the term “lark’s head” was imported from France by the dastardly Tom Bowling in 1866 (c.f. ABOK 3).
There’s a bad tendency to give the lark’s head different names depending on how it’s tied. Ashley calls it a bale sling hitch (ABOK 1694) when it’s tied in a sling, and some riggers refer to it as a cow hitch when it’s tied by threading the end.
For clarity and consistency, we always call it a lark’s head.