I think this is the Po Toi bird, it doesn't say so in English but I recognise the bird.
Yes, well done for releasing it. But it isn't an illegal trap, its an old fishing pot which has been left from the days when over 1000 people lived on the island. There are many of them lying around on Po Toi, I sometimes find small birds in them and release them, not much else you can do.
Actually there was something wrong with this bird. It kept crawling around on the ground, which is why it got caught in the pot. Regrettably, I think it has since died.