shrew
North American shrew with tail less than half its body length.
北美洲鼩鼱,尾巴比其身体的一半还短。
The relationship between food niche breadth or niche overlap and body size was also insignificant.
此外各种鼩鼱的食性宽度和种间食性重叠度和体型大小的关系亦不明显。