This tells me (that the mitzvah obtains) only in the private domain. Whence do I derive (the same for) the public domain? From "on the way."
Whence do I derive (that the mitzvah obtains with a nest found) on trees? From "on any tree."
Whence do I derive (the same for a nest found) on the ground? From "or on the ground." "on the way": What is the intent of this? Just as the "way" is not "in your hand" (i.e., at your disposal), so (the mitzvah obtains with) all that is not "in your hand" — whence they ruled: Doves of a dove-cote and doves of a loft and birds that nested in jars or in towers, and geese and hens that nested in an orchard and rebelled (i.e., flew away) are subject to the mitzvah of sending away. (Birds that) nested in the house and Herodian doves, which are thoroughly domesticated, are not subject to the mitzvah, (being considered "in your hand.")