Northern pygmy mouse
（重定向自Baiomys taylori）
The northern pygmy mouse (Baiomys taylori) is a species of rodent in the family Cricetidae. It is known as ratón-pigmeo norteño in the Spanish-speaking areas of its range. It is found in Mexico and the United States.
Parasites of the northern pygmy mouse include the intestinal nematode Pterygodermatites baiomydis.