69818
It relates to the cuckoo , a bird which lays its eggs in another bird 's nest ) .
 cuckoo
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:
 cuckoo