Vagrant

noun

1. A person who wanders from place to place; a nomad, a wanderer.
2. (specifically) A person without settled employment or habitation who supports himself or herself by begging or some dishonest means; a tramp, a vagabond.

   "Every morning before work, I see that poor vagrant around the neighbourhood begging for food."

3. Vagrans egista, a widely distributed Asian butterfly of the family Nymphalidae.
4. An animal, typically a bird, found outside its species' usual range.