This reminds me of the sad situation we often encounter in Hong Kong where birds swallow fish hooks left around ponds in the Deep Bay area. This has sadly led to the suffering and death of birds in the past, including Black-faced Spoonbills. See the following links for examples:
http://www.hkbws.org.hk/BBS/view ... &extra=page%3D3
http://www.hkbws.org.hk/BBS/view ... &extra=page%3D3
http://www.hkwildlife.net/viewth ... p;extra=&page=1