7993
Their diet appeared varied in the winter , and was less tied to one mammal than was the long-earred owl ; at times , northern saw-whet owls hunted larger prey , such as the meadow vole ( " M. pennsylvanicus " ) .
 animal: meadow vole
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 animal: meadow vole