74003
It measured the willingness of males of two species to feed incubating females on the nest when presented with models of a sharp-shinned hawk , which hunts adult nuthatches , or a house wren , which destroys eggs .
 house wren
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 house wren