Taking birds for example, for each avian successfully captured in the wild, often as many as 20 die as a result of shock, injury in traps, or other factors.
以鳥類為例，野地成功捕捉一隻鳥類，過程中因驚嚇、撞網等因素無辜傷亡的數量，常是倖存數的二十倍以上。