Expressions (phrases, clauses, etc.)
it is simply common courtesy to clean up after yourself; a bird does not foul the nest it is about to leave; on leaving a place, one should see that all is in good order
Proverbsee 跡を濁す
Also written 立つ鳥あとを濁さず【たつとりあとをにごさず】、立つ鳥後を濁さず【たつとりあとをにごさず】