The Institutes 535 CE part 28

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Of course any one who enters the ground of another for the sake of hunting or fowling, may be prohibited by the proprietor, if he perceives his intention of entering. Whatever of this kind you take is regarded as your property, so long as it remains in your power, but when it has escaped and recovered its natural liberty, it ceases to be yours, and again becomes the property of him who captures it. It is considered to have recovered its natural liberty, if it has either escaped out of your sight, or if, though not out of your sight, it yet could not be pursued without great difficulty.

13. It has been asked, whether, if you have wounded a wild beast, so that it could be easily taken, it immediately becomes your property. Some have thought that it does become yours directly you wound it, and that it continues to be yours while you continue to pursue it, it then ceases to be yours, and again becomes the property of the first person who captures it. Others have thought that it does not become your property until you have captured it. We confirm this latter opinion, because many accidents may happen to prevent your capturing it.

14. Bees also are wild by nature. Therefore, bees that swarm upon your tree, until you have hived them, are no more considered to be your property than the birds which build their nests on your tree; so, if any one hive them, he becomes their owner.

Right to prevent his entering

Any one, too, is at liberty to take the honeycombs the bees may have made. But of course, if, before anything has been taken, you see any one entering on your land, you have a right to prevent his entering. A swarm which has flown from your hive is still considered yours as long as it is in your sight and may easily be pursued; otherwise it becomes the property of the first person that takes it.

15. Peacocks, too, and pigeons, are naturally wild, nor does it make any difference that they are in the habit of flying out and then returning again, for bees, which without doubt are naturally wild, do so too. Some persons have deer so tame, that they will go into the woods, and regularly again return; yet no one denies that deer are naturally wild.

But, with respect to animals which are in the habit of going and returning, the rule has been adopted, that they are considered yours as long as they have the intention of returning, but if they cease to have this intention, they cease to be yours, and become the property of the first person that takes them. These animals are supposed to have lost the intention, when they have lost the habit, of returning.

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