Most Populous Bird Species

Give the common name (NOT taxonomic classification) of the bird species with the largest population worldwide.
Source = http://www.worldatlas.com/articles/most-populous-bird-species-in-the-world.html
Quiz by joez
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Last updated: May 4, 2017
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First submittedMay 4, 2017
Times taken28
Average score20.0%
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Population
Answer
24 billion
domestic chicken
173 million
common pheasant
168 million
common quail
145 million
great spotted woodpecker
120 million
common swift
Population
Answer
63 million
common cuckoo
50 million
Antarctic prion (petrel)
40 million
willow ptarmigan
27.5 million
black grouse
27.5 million
blue-crownded motmot
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Level 72
May 4, 2017
I would have expected to see seagull and Canada goose based on personal experience.