a person who does this

rambler

a person who, bird which, migrates

person who moves to a foreign place

a member of a community that wanders from place to place with no fixed home

person who wanders from place to place

a person who stops ships at sea and steals from them

buccaneer

(North America) a policeman on horseback; a forest keeper

patrol person

a person or animal that wanders

person who travels aimlessly

a traveller, especially one who is walking

traveler