Zaid b. Khalid al-Juhani reported that Allah's Messenger (ﷺ) was asked about picking up of stray things, whereupon he said
Make announcement of that for one year, but if it is not recognised (by the owner), then recognise its big and strap, then eat it; and if its owner comes, then give that to him. This hadith has been narrated on the authority of Al-Dahhak b. Uthman with the same chain of transmitters but with a slight variation of words.