Injuries to wild birds are not all caused by man. There are other reasons, such as injuries caused by the birds 'natural enemies like cats and dogs, or birds that are hurt because of poor nutrition from a static diet. These account for 16 % of the cases at the rescue center.
鳥類受傷不光是人為造成的，島被它們的天敵﹘﹘貓、狗追逐，或者因為食物來源太單一化、先天發育不足，造成鳥隻抵禦自然的能力較差而受傷等自然原因，也佔台北救傷中心收容傷鳥的百分之十六。