to peck is a form of:

Peck



ENGLISH MEANING
noun
1.
The fourth part of a bushel; a dry measure of eight quarts; as, a peck of wheat.
2.
A great deal; a large or excessive quantity.
3.
A quick, sharp stroke, as with the beak of a bird or a pointed instrument.
verb
1.
To strike with the beak; to thrust the beak into; as, a bird pecks a tree.
2.
Hence: To strike, pick, thrust against, or dig into, with a pointed instrument; especially, to strike, pick, etc., with repeated quick movements.
3.
To seize and pick up with the beak, or as with the beak; to bite; to eat; -- often with up.
4.
To make, by striking with the beak or a pointed instrument; as, to peck a hole in a tree.
5.
(INTRANSITIVE) To make strokes with the beak, or with a pointed instrument.
6.
(INTRANSITIVE) To pick up food with the beak; hence, to eat.