| zinc toxicosis in a free-flying trumpeter swan (cygnus buccinator). | a trumpeter swan (cygnus buccinator) was observed near a mill pond in picher, oklahoma, usa. it became weakened and emaciated after about 1 mo, was captured with little resistance, and taken into captivity for medical care. serum chemistry results were consistent with hepatic, renal, and muscular damage. serum zinc concentration was elevated at 11.2 parts per million (ppm). the swan was treated for suspected heavy-metal poisoning, but died overnight. gross postmortem findings were emaciation and ... | 2004 | 15650098 |